Help with exiting corners

[barry]

Hi,

My Tamiya TA-05 spins very easily coming out of corners on my local asphalt track. As someone who has been away from the hobby for a while, I could do with some help. I've altered droop, toe-in, and camber, but still can't seem to solve this. I've heard of people changing to a lighter grease in their diffs to make it less likely to break traction - can anyone tell me if this is worth the effort? Is it possible to 'loosen' my rear diff somehow?

Many thanks,
Barry

[cjm_2008]

the first thing I'd look at is driving technique mate. it's an easy place to start. are you trying to nail it before the apex?

slow down. practice each corner individually each lap - build up speed gradually.

if it isn't your driving, you obviously need to gain some rear end grip. this could mean softening the springs, using a lighter grade shock oil, or using a piston with more holes. try one thing at a time.

[qatmix]

Here are some settings from ta05

I would set the front camber to 0degree, and the rear to around -3 degrees.

I would move the rear shocks into the most inward postion, the front ones more outward.

As to the diffs, you actually would be best to tighten the front up slightly. All you have to do is turn the diff screw about 1/2 turn. I wouldnt do any more as you can break them if they get too tight. Try it and if its still to loose, turn it again another 1/2 turn.

But as has been mentioned, the real key is to slow down into the corner and power out past the apex.

Cheers

[barry]

Thanks both.

I really appreciate the advice. I probably am giving it too much throttle too early.

Barry

[sosidge]

Originally Posted by qatmix

I would set the front camber to 0degree, and the rear to around -3 degrees.

I would move the rear shocks into the most inward postion, the front ones more outward.

That is VERY extreme camber and not something I personally would ever consider using. 1 degree negative all round is usually in the ball park, with the aim of getting even tyre wear.

Diff should be set a little tighter at the front, rear should be set to rotate smoothly and relatively freely. A tight or notchy rear diff will cause no end of traction problems.

I found the TA05 to have a fair amount of steering. Just running a stiffer grade of spring on the front seemed to calm it down a fair bit, say Tamiya blue front and yellow rear.

There are lots of other things to check too, obviously make sure the car is in good mechanical condition and that all the parts are aligned and move freely. Something as silly as a loose steering part will ruin the handling. If you find yourself a bit lost on setup go back to kit settings and start again, really you shouldn't need to veer to far from them to get the car to your tastes.

Oh, and tyres matter too!

[barry]

Originally Posted by sosidge

Diff should be set a little tighter at the front, rear should be set to rotate smoothly and relatively freely. A tight or notchy rear diff will cause no end of traction problems.

Thanks for the advice. So just to be clear, I can tighten/loosen the diffs by tightening/loosening the screw that holds the diff together (a long cap screw on the TA05, rather than having to change grease? How loose/tight can I go!?

Cheers,
Barry

[sosidge]

Originally Posted by barry

Thanks for the advice. So just to be clear, I can tighten/loosen the diffs by tightening/loosening the screw that holds the diff together (a long cap screw on the TA05, rather than having to change grease? How loose/tight can I go!?

Cheers,
Barry

That's right.

Diff tightness can be anywhere between very tight and free spinning, but you should never be notchy and always have zero to very little slip. A setting for rear diff would be free to rotate but not spinning free if you spin the wheel. A setting for front diff would be a little tighte, turning with a little resistance by hand, but not notchy.

Ball diffs are something of a black art, a little time to learn their nuances and effect on car handling is time well spent.