Backend stepping out

[littlened]

Lazer ZX-5 SP

Just got the cones out and made a track on some fairly flat concrete. When powering out of corners I've noticed the back end it stepping out causing my to have to counter steer to correct it.

Just wondering what the usual cause of this is and how I'd go about correcting it.

Off the top of my head;

Too much grip at the front.
More power going to the rear wheels causing them to wheelspin while the front still retain some grip
Maybe the front diff is slipping under power, hence the reason why it seems to stay rooted?

I've got kyosho dark yellow springs on both the front and back, and the drive shafts are set level. So the suspension is pretty soft and doesn't sit too high.

Any advice?

I'm racing tomorrow night and it's indoor on a sports hall with a mixture of a slippery surface and some carpet. If the backend it stepping out on concrete, I'm pretty sure it'll go nuts on a slippery floor.

[Big G]

steer less

on a more serious note. soften the back end up. raise the links on the rear

[wacattack]

Longer wheelbase, lengthen the rear camber link position, raise the rear camber link position, put the rear shocks more upright (more of an outer hole on the tower, inner hole on the wishbone), softer springs.

Also do the opposite to the front to create less traction on the front of the car

[jcb]

don't know a lot about kyosho's but the following is pretty generic

could try a rear roll bar to help square things up as you apply power

increase anti squat tends to give better drive, but makes the car rotate more mid corner

I have always run the front diff tighter than the rear. But by tightening up the diffs it would make the car generate more forwards drive as the diff action will be restricted. (your diffs should never slip, thats why you have a slipper, which you could loosen off a bit)

[Col]

Stop driving on conrete!

The only way to set it up on sports hall floor is to drive on the sports hall floor.

[rallyjon]

Originally Posted by Col

Stop driving on conrete!

The only way to set it up on sports hall floor is to drive on the sports hall floor.

Makes perfect sense to me

[Big G]

Originally Posted by wacattack

Longer wheelbase, lengthen the rear camber link position, raise the rear camber link position, put the rear shocks more upright (more of an outer hole on the tower, inner hole on the wishbone), softer springs.

Also do the opposite to the front to create less traction on the front of the car

doesn't standing the shocks more upright and softening the springs work against eachother?

I thought hardening the rear was done to increase on power steering. In this example the OP's car is loose on power

Originally Posted by Col

Stop driving on conrete!

The only way to set it up on sports hall floor is to drive on the sports hall floor.

We have a guy like this at our club. "I can't understand it. The car is perfect in my workshop, but useless in the hall we race in"

[wacattack]

Originally Posted by Big G

doesn't standing the shocks more upright and softening the springs work against eachother?

I thought hardening the rear was done to increase on power steering. In this example the OP's car is loose on power



We have a guy like this at our club. "I can't understand it. The car is perfect in my workshop, but useless in the hall we race in"

More upright on the tower will make the rear end more stable entering the corner and exiting but a little loser mid corner. Generally the softer you go the more rear end you will have.

[discostu]

i would have to disagree with this if you go too soft with the rear suspention it will collapse under power basicly if the springs a soaking up all the weight transfer the tyres are not being pushed into the race track and the tryes are what give the grip like anti squat giving the car more anti squat will increase on power grip because it stops the weight transfer to the suspention and moves it on to the tyres were the grip is generated also standing the shocks up on the tower makes the car slightly stiffer but what this will also do is let the car square up quicker though chicanes and on throttle.

stu

[rich67]

Be more gentle on the throttle coming out the corner?

[Scoobster]

If you are going to be running at Seaham tomorrow its 100% carpet to stop the floor from being damaged so i would look for a good carpet set-up for it

[littlened]

Originally Posted by Scoobster

If you are going to be running at Seaham tomorrow its 100% carpet to stop the floor from being damaged so i would look for a good carpet set-up for it

ah, thanks for telling me, I didn't know that.

To those saying not to go on concrete because a sports hall will be different. I understand that, but I was practicing on conrete, it didn't feel right, and I want to understand why and how to correct it.

Once I get into the sports all, if I doesn't feel right, then from the bits I'm picking up, in my head I'll know what's causing it and what potentially to do to correct it.