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Old 21-11-2017
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Default KC setup advice needed - carpet

I need some carpet setup advice, I started with the kit setup for carpet and made some minor tweaks (front and rear roll bars), lighter diff oil.

Thing is, it's traction rolling mid corner. If i go easy, it's fine, plenty of steering in the sharp corners at lower speed, but that's not fast lapping! I tried adjusting the roll centre to prevent chassis roll, still traction rolls. Maybe the car is too 'locked' in and i need the back end to be more loose?
I'll upload the setup sheet when i'm on a computer that'll allow it.

Chassis is carbon, position 3
Front - yellow springs, 45wt, no internal limiters. 1.2mm roll bar, short upper link with 1mm spacer
Rear - Green springs, 35wt, no internal limiters. 1.1mm roll bar, long upper link, 2mm spacer
Ride height 15mm
Camber -1 all round

Question is, should i just copy the Orlowski Trencin setup for carpet? It's not like he was driving a badly setup car is it?!

Thanks in advance.
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Old 21-11-2017
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Thanks to Aiden for hooking me up will Allan O'Brien and David Snee, who are helping unravel my setup!

I'd raised the roll centre (shorter top links and lowering the inner link ball position) hoping it would stop the chassis rolling, what it was doing though, was increasing the grip so much that it caused traction roll! So lengthening the upper links (and raising the inner ball link) has lowered the roll centre. yes, the back is a little looser, but it's not traction rolling half as much. I can chase the local track rats through the infield now :-)
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Last edited by bish; 03-12-2017 at 01:17 AM.
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Old 09-12-2017
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I run a bit heavier oil. 50/40wt and 1.5mm droop limiters.
A can realy advise you to try position 2 on carpet.

I tried pos. 3 and found 2 way better with the same setup.

Can post my setup if you like.
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Old 09-12-2017
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My setup for EOS carpet.

Have to try some different springs, like blue front and rear.

No griproll on new tires. Think i can get some more cornerspeed out of it.
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Old 11-12-2017
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Oh cool, thank you. I've yet to try position 2! Think i'll have to try it soon. Appreciate the setup and oil weights.
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Old 11-12-2017
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Quote:
Originally Posted by Paultje040 View Post
My setup for EOS carpet.

Have to try some different springs, like blue front and rear.

No griproll on new tires. Think i can get some more cornerspeed out of it.
Thanks!
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Old 10-02-2018
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if anyone could help i am having an issue with my kc on carpet.
i am using the carpet starting setup and it seems ok but the rear end rises considerably under power. it seems to rise considerably and makes the car unstable on the fast corners when pushed. i have played with the anti squat but it still seems to do it. i am wondering if the motor rotation is the reason. dress anybody know of a way i can try to reduce this. many thanks
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Old 10-02-2018
stuey stuey is offline
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When the car is sitting at its ride height, what angle are the driveshafts? Are they at an angle pointing downwards towards the diff?
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Old 10-02-2018
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Quote:
Originally Posted by adey View Post
if anyone could help i am having an issue with my kc on carpet.
i am using the carpet starting setup and it seems ok but the rear end rises considerably under power. it seems to rise considerably and makes the car unstable on the fast corners when pushed. i have played with the anti squat but it still seems to do it. i am wondering if the motor rotation is the reason. dress anybody know of a way i can try to reduce this. many thanks
I like running a rear swaybar. It adds stability on corners when pushed. Even a thin one helps.
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Old 10-02-2018
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the driveshafts are pointing down towards the diff. i wondered if raising the diff would help the issue.
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Old 10-02-2018
stuey stuey is offline
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That's what I was going to suggest. A guy who knows his stuff told me recently that the driveshaft will try and straighten themselves under power, so if they are pointing down they are trying to lift the back of the car. If you can raise the diff so the driveshafts are about level at ride height it may help.
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Old 10-02-2018
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Quote:
Originally Posted by adey View Post
the driveshafts are pointing down towards the diff. i wondered if raising the diff would help the issue.
Yesssss high diff will help. Didnt mention that as high diff is kit standard
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Old 16-02-2018
Allan1875 Allan1875 is offline
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Quote:
Originally Posted by stuey View Post
That's what I was going to suggest. A guy who knows his stuff told me recently that the driveshaft will try and straighten themselves under power, so if they are pointing down they are trying to lift the back of the car. If you can raise the diff so the driveshafts are about level at ride height it may help.
This is more accurate with CVD driveshafts. With universal joints, they don't straighten so much under power and that's why they tend to ride bumpers better.
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