Nitrotec R21 .21 Race Engine

[Losi_Insider]

Nitrotec - Performance-Engineered Nitro Racing Products

Developed by Team Losi Racing and manufactured by Novarossi World S.R.L., the Nitrotec R21 3.5cc/.21C.I. Race Engine (LOSR2800) (http://www.losi.com/Products/Default.aspx?ProdID=LOSR2800) was designed to produce a race winning power band and throttle response while delivering exceptional run time. The Nitrotec R21 is recommended for use with the 8IGHT family of vehicles, as well as any nitro vehicle that requires a .21 engine.

Visit the engine's overview page (http://www.losi.com/Products/Default.aspx?ProdID=LOSR2800) on Losi.com for more information.

http://www.losi.com/Content/ProductStatic/LOSR2800/engines.png

[VWVR6_T]

Any information on approximate power? How many ports?

[KevinM]

Is this engine a good race engine compatible with the Ninja and V-spec engine in power and performance? What tuned pipes would be used for this engine?

[Big Red]

Any information on approximate power? How many ports?

http://www.losi.com/Products/Default.aspx?ProdID=LOSR2800

[KevinM]

I keep checking on the engine and it seems to keep backing up its release date. Whats wrong lack of engines to US? When will they be released? I cant wait to hear how they are in action.

[AndyItalia68]

Is this R21 a revised/optimized version of the Nova P3XST? Or the internal is similar to 21-4 (Plus4)? Thx in advance

[Travis Dupree]

The engine is a whole new engine. It was released last week.

[Rookie]

should be a great alternative for a great price. Any plans on making this the release in the future Buggy's? as most classes require no larger then a .21 in a buggy for sanctioned racing.

[AndyItalia68]

The engine is a whole new engine. It was released last week.
Yeah, it's a new engine :). But....is it more similar to the P3XST or the 21-4T ?
Just to understand...

[Travis Dupree]

The Losi engine is not the same as any other Novasossi's.

Update on the R21...

I ran the Spring Sting at The Badlands in Myrtle Beach, SC.

I spent Friday all day completing break in. I was able to get almost 3/4 of gallon through the engine during practice. I tried the RE11 and RE10 pipes on the engine and found the RE10 to be the one I liked. It gave the engine the better bottom end of the 2 pipes. The top end was about the same on both. I did have a lean bog on particular section of the track, which was a high speed triple quad. It turned out that I was a few hours too lean on top. Once I fattened the top end a small amount, the engine was nearly perfect. I decided to make a fuel run before I called it a day later in the evening. I was able to do 11.5 minutes. All of my temps were right at 200 degrees F.

The engine ran great in qualifying and I was able to TQ 2 of 3 rounds. After each qualifier, I checked my fuel used. I calculated that I could do 12.5 minutes on a tank. The increase in time, was do to being able to get more run time on the engine. I have been told to give the engine up to 3 gallons to be at it's peak, which is scary.

In the main I made a stop at the 10 and 20 minute marks. During the 3rd leg of the race, the engine went through a break in phase and fattened up a bit. As I crossed the line with 5 seconds on the clock, the car ran out of fuel. I was able to take the win still, since I had almost a half of a lap lead on 2nd place. I was concerned going into the main, that the engine may go through a break in phase, so I was not surprised. The engine out performed in every manor.

I am heading to the track tonight to try another pipe to see if I can get a little more bottom end out of the engine. The engine has great bottom end as it is, but I like to have a little more bottom end power.

I hope this helps someone out there. If you have any questions, fee free to ask.

[1fastdude]

If you get a chance I would like to know what a .053 pipe with the 41021 header comparision would be?

[Travis Dupree]

The Novarossi 9853 with the long header should be a good pipe for bottom end. I am not super familiar with the Novarossi products. I do know the 9901 is a good all around pipe.

I ran the Truhe 2013 on the engine Tuesday night and found it to be very good on top and bottom end. The bottom end improved dramatically. The fuel mileage was very good also. I pulled the car off at 8.5 minutes and still had fuel up to the fuel tubing where it enters the tank.

[KevinM]

Travis i bought a .28 GRP in a version 1 8T with a matching GRP pipe. Would that pipe work well with the Engine? Or how about the OS 2060 pipe? I am very interested in this engine to run in my 8T 2.0. What restrictor come with the engine and what were you running in the engine?

[Travis Dupree]

KevinM - I have tried the RE10 and RE11 pipes on the engine. The RE10 is a bottom end pipe similar to the OS 2060. The RE11 is similar to the OS 2050. Keep in mind these are similar, but not identical. Both pipes performed well and as they should. I would say that the 2050 should be good, but if you want more bottom, go with the Truhe 2013 for now. I will be trying more pipes over the next few weeks.

I would try the GRP. I was talking to a friend just last night about the GRP pipe on the Losi Engine. Pipe performances will vary from engine to engine, so it hard to say exactly what they will do with one engine to another.

[Travis Dupree]

Report from the weekend...

I ran the Spring Cup race at Outlaw Raceway in Aiken, SC this past weekend. I decided to run the Truhe 2013 pipe for the weekend on the Losi R21. In qualifying the engine ran well. It had great bottom and top end. The track was flat with typcial jumps and bluegroove. There was one double directly out of a 180 degree corner, that I saw a number of racers struggle to make, but the R21 handled it with ease. I was using less than 10cc per minute in qualifying, so making 10 minutes should not have been a problem. In the main, I decided to stretch my first stop closer to 11 minutes and was able to do so. I made my second stop at the 20 minute mark. After I finished the race, I took an extra lap. I went 10.5 minutes on the 2nd stop. I checked the tank and found that I had about 1/4" of fuel in the bottom of the tank. This would have easily gotten me to 11 minutes again. The engine is performing well with the Truhe 2013 pipe and header. I plan to ty a Novarossi 9901 soon.

[Chuck Hicks]

I ran my R21 this weekend at the Nitro Pit for the finals of the ACS. I ran the RE11 pipe in practice and qualifying and got decent results. For me the engine did not have enough bottom for the technical Nitro Pit layout and seemed to get about average fuel mileage. For the main I decided to try a 9853/41021 combo and all I can say is WOW!! This really woke the engine up! Great bottom end and no lacking top end. I was able to pull a couple Plus4's down the front stretch. Also gained almost 2 minutes of run time.

[matt_fastcars]

i have a xxx-nt and i ordered a .16 cxp engine to go in it will it work?

[Travis Dupree]

matt_fastcars - If the engine made for 1/10, it should fit. We ran .12 engines in the XXXN-T's.

[KevinM]

Whats the normal break in period for the nitrotec? I ordered my 2013 pipe today and waiting to get it and buy the engine and go thru the break in process. What nitro percent are you using 25 or 30%? I think the rain is gonna rain out our race here this weekend.

[Chuck Hicks]

Well since the Nitrotec is made by NovaRossi it should take about 1-2gallons of fuel before the engine is completely broken in. I have about 3/4 of a gallon on mine and it still sticks at the top sometimes trying to start it.

[Travis Dupree]

Chuck - Kevin G. told me it could take up to 3 gallons. I am over a gallon now and it still has quite a bit of stick at top dead center.

KevinM - 30% Nitrotane

[Chuck Hicks]

I have never heard of one taking that long but hey, that just means that it will last longer over all. Got to love that novarossi quality.

[KevinM]

What clutch setup are you running with the nitrotec? Losi or aftermod?

[josecastano]

Hi any one has used the R21 with the nova 9901 and 41021 ??

Regards from the other side of the world.! ;-)

[Travis Dupree]

KevinM - Steel flywheel with 2 alum and 2 composite shows. Gold and Green Springs.

Jose - Will be tomorrow.

[josecastano]

Ok ! ;-) I will start break in today and see how is going with de 9901.! ;-)

Regards.

[Travis Dupree]

Jose - It will take a full gallon to get to a decent break in point, but it will take 2 to 3 gallon to be completely broke in.

[josecastano]

Thanks Travis, i just made about a galon, but it sill sounds like not complete break in, so i will continue tomorrow.

[KevinM]

KevinM - Steel flywheel with 2 alum and 2 composite shows. Gold and Green Springs.

Jose - Will be tomorrow.

Travis what shoe is the prefered alum shoe the blue or the long wear shoe? I have 4 blue shoes that came stock with the RR.

[Travis Dupree]

KevinM - Run the blue aluminum shoes.

I ran the 9901 and 9853 today. It was pretty much what I expected. The 9853 had a lot of bottom and mid range with a decent amount of top end. The 9901 had a little less bottom and good top end, but a smoother through the power band. If there was a tight track with jumps that were incredibly hard to make, the 9853 would be the pipe of choice. I would have to say the 9901 would be a very good all around pipe. The engine was today was a new one and getting 11.5 minutes. The power and fuel mileage will only get better with full break in.

The Truhe 2013 and Nova 9901 produce a similiar feel.

[Henrik]

How hot are you running your engine?

Where is your needles standing for now on top/bottom, flush bottom/1mm in top exempel?

[Travis Dupree]

Henrik - 200 - 210. The bottom end is about flush and the top end just below flush.

[KevinM]

Hey Travis ill pick up my engine and i bought the 2013 pipe. So far with the pipes you have tried which one do you like the best? I will be breaking it in this weekend and hope to have some good runs with it. Hey another quick question- Glow plugs what plugs can be run in the engine? I know its a turbo plug but just novarossi plug or will say an OS plug work or other plug? I want to keep the same type of plug for all my engines if i can.

[Travis Dupree]

KevinM - I like the Truhe 2013 the most currently. I think the Nova 9901 will be good too, but I need more time to get the feel of it. I am running the OS/Mugen P4 plugs. Take your time with the engine break in. Make sure to heat cycle it. Run a tank and let it cool to ambient temperature and then run it again. Do this for at least a quart and even a half gallon if you can.

Taz is correct, all engines will have a small difference in needle settings.

[KevinM]

Travis i picked up my new engine today. I plan on using a heat gun to help get the engine started its heat cycle. I was told that Odonell plugs are correct thread pitch. So if your saying the OS plugs will work thats great i can stock up on just the one plug. I run the P3 in my other engine. I will attempt to break it in this weekend ill let you know what i think of it when i can get a gallon thru it.

[Travis Dupree]

Kevin - I was told that once you use the OS plug, you can not go back to Novarossi plugs. I do not know if this is true or not. If you are happy with the Odonnell or OS plugs, I would assume that you would not need to change to another brand.

[KevinM]

Travis this weekend i was breaking in my new engine and i have about 3/4 gallon thru it and i am impressed with it so far. The 2013 pipe has great bottom end but im lacking the top end for now i can lean it out but i dont want to lean it too far. I did switch over to the 2060 pipe and now i have lots of top end. I need to finish off this gallon and work on my lap times here at the local track.

Now in begining of this thread people were asking about how many ports this engine has. It was stated that it has 3 ports but on the engine page itself it says it has 4 ports. How many ports does it have? Just curious.

[Travis Dupree]

Kevin - It sounds like you are doing everything right. The engine will not perform great until you get at least a gallon on it. Even after a gallon it will not be at 100%. I have been told it could take up to 3 gallons.

It is classified as a 3 port.

Starting this Saturday, I will be out of the country on vacation for a week. I will not have access to the internet. If you have any questions this week, feel free to ask.

[Don Vinkemulder]

I ran the Losi R21 engine for the first time this weekend. Ran great the whole time even though it is still under a gallon. It is easily getting over 10 minutes runtime. It has a lot of bottom end with the OS 2050 pipe. That is all I have for now. I have the 2013 pipe on back order. Can't wait to try that one. Hope it will even out the power band. TQ and 1st. in the main. A+ on this engine.:)

[KevinM]

Don i dont know what the OS 2050 pipe sounds like but i do like the sound the 2013 pipe makes. It has great bottom end burst and until i get the top end just right and broke in all i can do is keep driving it. My other team driver say it sounds great and its slowly coming alive. I dont know how you all feel as a pro driver class but i think it will be a great sportsman class engine. I look forward to hearing how you all do with this engine.

[Travis Dupree]

KevinM - The Nitrotec is a great engine no matter what class you run in.

[Kevin Wilson]

You can go back to nova plugs even if you try os plugs. That was a grp thing. I have ran both the os p4 and the nova c6. The nova plug tunes better and makes better power.

[Travis Dupree]

Kevin - Thanks for the info.

[Kevin Wilson]

Hi Travis, how have you been. I want to try and make a race out your way sometime this summer.

[Travis Dupree]

Things have been good. What about you? Are you going to be AMS in Alabama this June?

[KevinM]

Ok today i finally got a gallon of 30% thru the engine. Its running great and still WOW on that 2013 pipe and the bottom end. Lot of people are asking what i have in my car and how i am liking it. I hope that the rain holds off for our race this weekend.

[Kevin Wilson]

Things are good. I won't be able to make AMS. Good luck though.

[big dogg]

Ok today i finally got a gallon of 30% thru the engine. Its running great and still WOW on that 2013 pipe and the bottom end. Lot of people are asking what i have in my car and how i am liking it. I hope that the rain holds off for our race this weekend.

Hi my name is ronald and I run losi where do you run

[KevinM]

Hi Ronald i run at Middle River Hobbies

[big dogg]

hi i have a c6 .21 engine for my losi and i like to know if thats a good engine.

[big dogg]

hi kevin i have a c6 .21 raceing engineing and i like to know is that good to run.

[Losinumber1fan]

I have one of these on my 8T 2.o. Running a Jammin JP-1 header. It has really good bottom end even with a 15 tooth clutch. I had to put 2 plastic clutch shoes in it to stop so much wheel spin when I squeeze it. It is awesome. It's the first "good" engine I bought. I had been running the really basic stuff....RTR stock engines and the basic O.S. engine. My buddy bought an O.S. VG-B-Spec so I had to do something. I have been very pleased. It took me two weeks to get the handling back because it has so much more pop than the engine I was running.

[Losinumber1fan]

I am running the Jconcepts cross hairs half ups on Jconcepts rulux wheels. They are really light and hook up great, or they did till i bolted up the new Nitrotec engine. I got it harnessed now and I love it!!

[KevinM]

hi i have a c6 .21 engine for my losi and i like to know if thats a good engine.

Hey Big the R21 is a great engine right out of the box. I started it up the first time and didnt have to mess with the idle at all. The only thing im not used to is the high idle the engine has but with a 2013 or 2060 pipe the engine runs great. I have my first race with the engine now and with the wackyness of the weather being cool and windy with track dry and dusty the engine performed very well. Others have said that they noticed a great improvement from initial break in. Well let me see what i have after this next gallon has gone thru the motor.
I run this motor in my 8T 2.0 and its doing great.

[big dogg]

thanks for getting back with me i have to run it. and i have a 427big bock to is that good allso because i'm looking for a good one to run on sat..

[KevinM]

thanks for getting back with me i have to run it. and i have a 427big bock to is that good allso because i'm looking for a good one to run on sat..

The truggy RTR comes with a 454 and that has alot of power but other say that the 454 gets better with a R11 pipe. I will not be racing this coming weekend due to work but the following weekend ill be at MRH doing their second points race.
THat R21 motor is a pretty good motor for budgets in mind. In a 30min main i was able to just pit 3 times and though i seem to be having bad luck this starting season the engine performed very well. I would recommend it to anyone.

[big dogg]

so you run at middle river hobbie if so i come out there alot like last sat.

[KevinM]

so you run at middle river hobbie if so i come out there alot like last sat.

Yes i was there running my truggy

[Don Vinkemulder]

A little update on my Nitrotec Losi engine. Have now about a gallon and the fuel economy is 11-12 minutes. I actually think I like the Losi RE11 pipe instead of the 2013. Runs 220 range with the RE11 compared to 200 range with 2013.
Just might be my personnal preferance. Will try it again back-to-back to get more time on it. So far, the engine is really coming to life already. Really happy with it.:D

[KevinM]

Ok I ran 2 races with my Nitrotec and finally had to change my first glow plug. It is running well with the 2013 pipe on my small technical home track. I did place second in the A main truggy. I am thinking about putting that engine into a buggy and race the buggy. I have another friend that has the Tec and 2013 in his buggy and we are both still in breaking in phases and both cars were showing staight away speeds that of the Ninja and other engines. I cant wait to see these engines fully thru the break in phases.

[KevinM]

Travis on your Notrotec are you running it in a buggy or truggy? Just curious on fuel time . My friend and i have the tec engine and with 2013 pipe we have different vehicles. I am getting about 10 min on a tank with a gallon and two races ran thru it. And to all other readers what are you running the nitrotec engine in buggy or truggy?

[Travis Dupree]

KevinM - I am running it in buggy, but will be running it in truck soon.

Update on the engines. I went to Round #1 of the RC Pro Series East Division this past weekend. The engine I ran was my second engine, so it had only 1/2 gallon. I ran the Novarossi 9901 pipe and really liked it. The engine performed flawlessly. I was doing 8 minute stops in the main since the engine was still so new and I was worried it may go through a break-in phase. I was using only 70 to 80CC's each stop, so fuel mileage was not an issue.

I will be in Alabama at the AMC race next weekend, so if anyone from the forums is there, feel free to come chat with me.

[Spiderman]

Hi Travis,

I bought and have tried Nitrotec with RE11 pipe and C6tgc. I found that it was too smooth on the bottom and it had no top end; meaning the engine seemed to be very slow. And also I could only get about 8.30 min run time (i usually get 9:30 mins with blue v spec). The over all performance seemed to be lower than my expectation. I believe, there is something missing here. I dont think the engine was giving me the full potential. I also tried to take out 1 shim (became 0,8mm) and use 2013 Sirio pipe; and helped a bit. The other concern is by using C6tgc, the idle was a bit sensitive but it got better with OS P4. I'm a bit lost here. Could you please guide me with the tuning, like how many turns out or in for high end and low end needles, best choice of plug (OS P3?), pipe, gear ratio (?) or even best breaking in process for this engine. I'd really appreciate your help. Thank you.

[Travis Dupree]

Spiderman - How much fuel do you have through it? The engine will not have the performance new as it will once it has broken in completely. You should wait until you have at least a gallon on it before taking a shim out. This will make it easier to keep the temps down during the break in process. I have just over a gallon on both engines and they still have a good bit of pinch on them. I have been told that it could take up to 3 gallons to get the pinch out and be completely broken in. I am getting 11 to 12 minutes without any issues.

I am running a P4 plug with the Novarossi 9901 pipe and 41021 Header. The Siro 2013 pipe works well. My low end needle is just below flush and the top end needle is about 1 turn in from flush. These are just guidlines, so your settings will not be exactly the same most likely.

[KevinM]

Travis I think the Nova 9901 and the OS 2060 are the same? I do like the 2013 pipe on tight tech track but havent raced it on a larger more open track yet but i think ill use the 2060 pipe on it. I hear the Blue Diamond up here at Deleware is a very nice large track and its a roar race on June 5. I wish i could come see the pros race and talk to yall on set ups and tech advise.

[Travis Dupree]

KevinM - I am not sure on the comparison of the 2060 to the 9901.

[Spiderman]

Spiderman - How much fuel do you have through it? The engine will not have the performance new as it will once it has broken in completely. You should wait until you have at least a gallon on it before taking a shim out. This will make it easier to keep the temps down during the break in process. I have just over a gallon on both engines and they still have a good bit of pinch on them. I have been told that it could take up to 3 gallons to get the pinch out and be completely broken in. I am getting 11 to 12 minutes without any issues.

I am running a P4 plug with the Novarossi 9901 pipe and 41021 Header. The Siro 2013 pipe works well. My low end needle is just below flush and the top end needle is about 1 turn in from flush. These are just guidlines, so your settings will not be exactly the same most likely.

Hi Travis, thanks for your reply. I've run the engine about almost a gallon already. If its true that it should take 3 gallons to break in the engine, its very long and not to mention it's going to cost us more (fuel is not cheap). Is there anyway to shorten the run in process? and how do you run in your engines (the routine)? Thank you.

[Travis Dupree]

Spiderman - There is no way to speed up the break in. I idle the first tank in the car at a cooler temp, say around 150. This is to just help flush the engine out. The next tanks is at idle between 180 and 200 degrees. I then run the engine easy for for about 4 tanks and let it cool between each one. You just have to run the engine repeatly after this. The engine should be between 200 and 220. The engine should run well and get good fuel mileage after a gallon, but it will get even better after that. Just give it time.

[Spiderman]

Spiderman - There is no way to speed up the break in. I idle the first tank in the car at a cooler temp, say around 150. This is to just help flush the engine out. The next tanks is at idle between 180 and 200 degrees. I then run the engine easy for for about 4 tanks and let it cool between each one. You just have to run the engine repeatly after this. The engine should be between 200 and 220. The engine should run well and get good fuel mileage after a gallon, but it will get even better after that. Just give it time.

Hi Travis, thanks for quick reply. When you mentioned run the engine easy for 4 tanks, what is the temp range? and when I have to repeat the process, do I have to cool it down each tank? Do you like the engine to have a bit of pinch after break in or no pinch at all? I'm sorry to ask you too many, I just want to stick with Nitrotec and follow the best procedure in order to get it right. Thanks again.

[Travis Dupree]

Spiderman - The engine should reach at least 190 each time. You want to let it cool after each tank. This will heat cycle the engine. The engine goes through expansion and contraction each time. This is what really helps with break in, especially when it is in the first half gallon. There may be very little to no pinch once break in is complete, but you should have good compression.

Maybe this will help...

1st Tank - Idle at above 150
2nd & 3rd - Idle at 180 to 200
4th - 7th - Run easy at 190 to 205. Let engine cool between each tank.
8th & on - Tune as you normally would, but do not try to overtune.

[Spiderman]

Spiderman - The engine should reach at least 190 each time. You want to let it cool after each tank. This will heat cycle the engine. The engine goes through expansion and contraction each time. This is what really helps with break in, especially when it is in the first half gallon. There may be very little to no pinch once break in is complete, but you should have good compression.

Maybe this will help...

1st Tank - Idle at above 150
2nd & 3rd - Idle at 180 to 200
4th - 7th - Run easy at 190 to 205. Let engine cool between each tank.
8th & on - Tune as you normally would, but do not try to overtune.

Hi Travis,

That is very clear. You've been very helpfull. I'll follow your advise and update you with the outcome. Really appreciate it. Thank you so much.

[1fastdude]

Just a reminder NOT to use an O.S. plug with the Nitrotec. The taper of the plug is different! Use a NovaRossi or Odonnel plug. O.S. plugs will work, but they ARE NOT recommended for a proper seal.

[KevinM]

Anyone using the engine in a Truggy yet other than me? Do the Novarossi plugs come in different temps like the OS?

[michel smith]

No idea,it would be easier just to buy it,i run top fuel 33% in my Traxxas,40% in my Ultra MBX Pro,20% in my HPI,Mugen Sekie and Serpent 710.

[Travis Dupree]

I found the Novarossi C6 plug to have more response and more bottom end than the OS P4.

I am now running the temps closer to 230. This is with either plug. Interchanging the plugs has not been an issue.

Dakota Phend is running the R21 in his truggy and it looks really good.

[KevinM]

Travis i bought a 2.0 RTR buggy from a friend and swaped out his 350 motor for the nitrotec. I hope to find out how well it works on our tight track. Will let you know tomorrow or sunday lol

[greenwood]

ok i know one of you said youre getting between 10 - 12 mins to a tank but there was no mention of venturi size all that was stated was the use of an RE11 pipe about 220 degrees i would like to know venturi size clutch type (3 or 4 shoe) and set up (springs) how much fuel have you got through it cause ive got this engine and have run about a gallon and a half through it and im lucky to get 8 mins to a tank at 230 +/- it does seem very promising but im losing my mind ive got the 6mm venturi in it RE11 pipe nitrotec plug 3 shoe with 1mm springs 2 fuel filters and a good amount of fuel line

plain and simple im lost

[Travis Dupree]

greenwood - This is what I run on the Losi Eight 2.0 with Nitrotec engine...

Losi 4 shoe Aluminum Flywheel
2 Composite and 2 aluminum shoes
green springs on the composite and gold springs on the aluminum
13/48 for the clutch bell and spur gear

Needle settings on the engine(these may change with air conditions and track type)...

Bottom end should be close to flush
Top end should be just below flush

I am currently running a 6.5mm venturi, but I will be testing a 6mm venturi this week. I am also running a Novarossi 9901 pipe with the Nova 41021 header. The Losi pipe will be fine for mileage, but may have a little less overall power.

[KevinM]

Travis i ran my nitortec in my 2.0 buggy with the 2013 pipe this weekend. I dont seem to be getting much top end but it has tons of bottom end. Should i try a different pipe? I was getting just 6-8 min of run time i still need to get more run time on it i think i have about alomost 2 gallons in it.

[Travis Dupree]

If your temps are low and the engine is running well, try leaning the top end a little. I have found 220 to 230 is pretty good.

[ahunt84]

Just got my r21 put on my B2.0 last night. Had just enough fuel to get it broken in. I went with the re10 pipe. The 4 or 5 laps I got in with it tuned it seemed to have plenty of bottom end and that was with and aluminum flywheel and 4 fiber clutch shoes. I will be racing it this weekend so I hope to have a better idea of what this motor will do by then. Waiting on fuel right now so I can run it some more and before then and hopefully the motor will have gone through all its major changes by the race Saturday.

[KevinM]

If your temps are low and the engine is running well, try leaning the top end a little. I have found 220 to 230 is pretty good.

Ill check my temps friday. I have maybe too much pop on bottom end. Should i change clutch shoes? I have all alum shoes on it now.

[Travis Dupree]

KevinM - The clutch shoes is your choice, but if you want a little less and smoother bottom, go to 2 aluminum with gold springs and 2 composite with green springs. Don't get too hung up on the temps. These are just a guide to be sure that you are not running too hot. You just want to be sure you are not lean bogging the engine or have a run on after you release the throttle.

[ahunt84]

I raced this weekend and loved this engine. Held a tune great all day. A lot of the guys were having flameouts and tune problems I'm guessing from the extreme humidity here in KY but I never had single problem with mine. I ran it with the 6 venturi and got a little over 11 mins of run time. I was wondering if going to the 6.5 would make that much difference on fuel mileage and will I have to drasticlly change my tune when I change the venturi. I am assuming I will have to richen a little since this will allow more air. I was getting 220-225 temps all weekend in 95+ degree with 100+ heat index. Will changing the venturi change my temps as well? Thanks in advance for any help.

[Travis Dupree]

ahunt84 - Going to a bigger restrictor will give more power for sure. You will not have to pull the throttle as hard on bottom, so you should get pretty close to the same run time. Good to hear you are liking the engine.

[ahunt84]

Thats good to hear I am really wanting 10-11 minute run times so hopefully the 6.5 will be just what I am looking for in the motor. Thanks for the fast reply.

[Travis Dupree]

ahunt84 - I ran the 7mm this past weekend and really like the power, but did not get a chance to make a fuel run.

[ahunt84]

Thanks for the info Travis I will try both before the next race in a few weeks. I was hoping to get to go to Futaba Nitro Challenge but I have to work that weekend so a club race will be the next time I get a chance to race.

[Matt Chambers]

Myself and Dustin Evans both ran the Nitrotec R21 this past weekend at the ROAR Nationals. We took out a thin head shim and ran the 2013 pipe. I have to say my motor ran awesome! I tuned it at the start of the weekend and didn't touch it at all and it ran PERECT. I am very impressed with the powerband of this motor especially when using the 2013 pipe. :)

[Chuck Hicks]

I ran mine with a 9901 this past weekend and didn't have to mess with it either. Zero flame out issues like some other engines at the Nats. Awesome engine for sure!!!!

[305KILLA]

Ive been running mine with the 9853 and it rips ,i took off a shim(0.10) and been running 25% and i can go 14min. with no tunning issues,i tried all the pipes out there and i get the best performance and runtime with the 9853 with the 41021 header, i love it :)

[ahunt84]

I have a dynamite 053 pipe that I was running on my GRP before I got the nitrotec. Does anyone know if this pipe similar to the nova 9853? I am currently running a RE10 on my Nitrotec and love it but would love to get 13-14 minute run times out of it.

[305KILLA]

I have a dynamite 053 pipe that I was running on my GRP before I got the nitrotec. Does anyone know if this pipe similar to the nova 9853? I am currently running a RE10 on my Nitrotec and love it but would love to get 13-14 minute run times out of it.

it might be the same but the Nova 9853 is made with the super strong material and that can change the performance and runtime from one to another.

[Cappy]

Well.. I just bought a Nitrotec R21 and upon performing a leak test (with soap and water) quickly found out that the front bearing leaks like nobody's business. I now have $100.00 worth of Boca bearings on their way for replacements . Kepp this motor in your prayers. :(

[Travis Dupree]

cappy - No sure how you did your testing, but there is not a perfect seal on any engine bearings. They all will have some small amount of leakeage. It is impossible to have a 100% hermetically sealed front bearing. Non to mention that water and soap are thinner than oil.

[Cappy]

cappy - No sure how you did your testing, but there is not a perfect seal on any engine bearings. They all will have some small amount of leakeage. It is impossible to have a 100% hermetically sealed front bearing. Non to mention that water and soap are thinner than oil.


Thanks Travis. Good points. Not really a big deal though. Gives me a chance to break it down and take a look at it. The test i used was .. blow air into the carb and brush soapy water around the joints. Carb neck, backplate etc. Just seemed like alot of bubbles coming from the front bearing as compared to my Dynamite Mach 2 where there was no leakage at all.

[Travis Dupree]

cappy - It is not a good idea to pressurize the engine in that manor. You are introducing the chance of blowing a seal out and starting leaks. Unless you see a heavy oil residue coming from the front bearing during running, I would not worry about it. If you need anymore help, just holler.

[Cappy]

Travis - There better not be any leaks when im done. If there are then i screwed up LOL . The whole motor is torn down. I will reseal upon assembly.

[Curtis May]

I have to say I've been very happy with this engine,I've got over 4 gallons on it now and its still tight as can be and the run time is awesome...I've been averaging 11-12 minutes even on the larger outdoor tracks using the RE11 pipe and header with the 7mm insert.

[Cappy]

..I've been averaging 11-12 minutes even on the larger outdoor tracks using the RE11 pipe and header with the 7mm insert.

Great cant wait !! Also gonna try out the RE10 ...;)

Update...
So far so good. I got about 3 tanks through it already. Having issues keeping it @ 200.
I can tell its ready to rip. Gotta restrain myself from pushing it.

[warpig]

I'm glad everyone is having such good luck with this engine. I, however, am not. The engine does not produce good power. It feels like I'm pulling a trailer behind my car. I've tried all the venturi inserts, I took a head shim out, I put a long header on it and nothing. The engine feels totally dead when I'm driving it. I went with a 9901 pipe with a short header to start. I'm very disappointed. I have had countless Novarossi and O.S. engines and this is the worst one by far. I'm not sure what to do at this point.

[Cappy]

I'm glad everyone is having such good luck with this engine. I, however, am not. The engine does not produce good power. It feels like I'm pulling a trailer behind my car. I've tried all the venturi inserts, I took a head shim out, I put a long header on it and nothing. The engine feels totally dead when I'm driving it. I went with a 9901 pipe with a short header to start. I'm very disappointed. I have had countless Novarossi and O.S. engines and this is the worst one by far. I'm not sure what to do at this point.

Thats not good at all. Make sure theres nothing draggin in your drivetrain. Brakes etc..
Got good compression ?

[warpig]

Yep.. everything is very smooth. I've been doing this for a long time. When an engine is too weak to engage the clutch 100% then, you know something is wrong. I have dynamite max life shoes that are in need of replacing after one race day. It just doesn't have the power engines normally have.

[Travis Dupree]

warpig - How much fuel do you have through the engine? If you are running a Losi Eight 2.0, we are running the aluminum flywheel with 2 blue aluminum and 2 composite shoes. Gold springs on the aluminum and green on composite.

[warpig]

Travis,

that is a good question. I don't have even a gallon through it. It is far from broken in. So, you could conclude that it is because it is not producing optimum power at this point. The trouble with that is I've ran many engines and have yet to have one not race able after heat cycling. I can barely clear jumps that I can with my SCT truck. The clutch is built well and slips like it doesn't have enough power to keep it engaged. It has a sort of sick sound to it when I'm driving it. All of this makes me think something is wrong. I plan on calling Losi (not sure if it's them or Horizon) to see if there is anything that can be done. I haven't ruled out the pipe yet either. It's all brand new equipment. It's hard to imagine my pipe being defective or even the engine. But, I cannot find anything wrong. I have a vspec coming to keep me happy until this is cleared up.

[Chuck Hicks]

Travis,

that is a good question. I don't have even a gallon through it. It is far from broken in. So, you could conclude that it is because it is not producing optimum power at this point. The trouble with that is I've ran many engines and have yet to have one not race able after heat cycling. I can barely clear jumps that I can with my SCT truck. The clutch is built well and slips like it doesn't have enough power to keep it engaged. It has a sort of sick sound to it when I'm driving it. All of this makes me think something is wrong. I plan on calling Losi (not sure if it's them or Horizon) to see if there is anything that can be done. I haven't ruled out the pipe yet either. It's all brand new equipment. It's hard to imagine my pipe being defective or even the engine. But, I cannot find anything wrong. I have a vspec coming to keep me happy until this is cleared up.

warpig- This engine does take an extraordinarly long time to break in. It is due to the new CNC pistons that Novarossi have come out with. Mine took 2 1/2 gallons before it really woke up. It just take a little patience. The good thing is that this engine will last you a long time and perform throughout its life span. I have a little over 4 gallons on mine and it is still hard to turn over by hand. Ran it at nationals and it still has plunty of power.

[Travis Dupree]

warpig - What are you high and low needle settings? Flush, out from flush, or in from flush?

Also, what is your location? Maybe we have a Team Driver in that area.

[RC_Addicted]

Sounds cool....:-)

[smokedsalmonkid]

hi guys what nova plug do i need with the nitotec engine

i know its a six but i have seen two options

C6TGF and C6TGC whats the difference ?

thanks

[Todd Hodge]

hi guys what nova plug do i need with the nitotec engine

i know its a six but i have seen two options

C6TGF and C6TGC whats the difference ?

thanks

The C6TGF are a short plug which is colder then the C6TGC

The F plugs are cold, mostly for on road
The H plugs are medium mostly for on road
The C plugs are hot mostly for off road

[smokedsalmonkid]

The C6TGF are a short plug which is colder then the C6TGC

The F plugs are cold, mostly for on road
The H plugs are medium mostly for on road
The C plugs are hot mostly for off road

awesome thats cleared that up for me perfect thanks

[KevinM]

I am using the Odonnel plugs is thier a difference in the NOva and OD plugs