Losi XXX-S No Grip??

[ChrisUK]

Hi

I have recently put in a 17t brushed motor in place of the custom 19t brushed motor on my XX-S touring car. The straight line speed is now fantastic, but I am having real trouble with grip at my local outdoor track. I have tried putting on slick tyres but am still losing the back end on many of the corners.

Is there anything else I should be doing? Do people use Tyre additive or anything for grip?

Thanks for any help

Chris

[TFrahm]

Try softer rear springs and/or lighter oil in the rear
OR
Stiffer front springs and heavier oil in the front...
(you can try doing both - softer rear and stiffer front, but I recommend you change one end of the car at a time so you know what the effects are...)

Have you tried moving the battery back?

Check your chassis' ride height (fully loaded with battery, etc.) -- you want the chassis to be level front to rear (no "rake") as a starting point. From there, you can try SLIGHTLY lowering the rear of the chassis (1mm at a time) to see if that helps...

You may also want just a bit more negative camber on the rear tires to help add side bite with the higher speeds you are getting now...

If it is worse when turning one direction than the other, the chassis may be "tweaked" -- the tires are not equally loaded -- check to see...?

There are subtle things like droop that can come into play, but start with the more basic things.

[da John Wee]

your tires are worn, get a new set. or weather got colder get a new set of softer tire.

[Briguy]

It`s been a long time since I played with touring cars but I do remember what TFram is talking about and remember we used traction compound .

[ChrisUK]

Hi whats traction compound?

[TFrahm]

Hi whats traction compound?

Something like Paragon, Trinity, Corally. etc. sell -- or any of the other special tire "sauces" sold for the purpose of treating the tire rubber to make it have more traction.. They tend to have exotic names like "Jack the Gripper" or "Red Dot" or "Buggy Grip", etc... -- many (most?) have some sort of Wintergreen smell to them, although some do claim to be "odorless"...

Some of the simpler approaches involve things like Simple Green (the spray bottle cleaning product) -- just cleaning tires and letting it soak into them before each run can do wonders.

Some tires and racing surfaces also seem to "like" things like WD-40 (yes -- the "lubricant") -- it can soften some tires quite effectively (wipe off well before running)...

I've heard of things like "belt dressing", etc. made for automotive or industrial use working too, but I've never tried those...

[Briguy]

I remember using a traction compound that was really sticky and some guys would use coca cola on their tires .

There are two types , ones that soften the rubber and others that stick to the rubber . The sticky stuff only works if you are on a clean asphault track .

[da John Wee]

changing set up here and there or adding, switching a traction chemical can be only good if you have a right set of tires on your car.

[YZFAndy]

If everything is the same except motor but now your losing rear grip it might be down to "drag brake" effect of the different gearing. Try slightly less rear drop or a lower drag brake setting or none at all if your speed controller supports it.

It may be just as simple as needing to be a bit more gentle on the throttle.

When is it losing rear grip? going into, coming out of a corner?