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Dec 1 2013, 12:20 AM
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#1
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Experienced Member ![]() ![]() ![]() Group: Advanced Members Posts: 1,099 Joined: 14-October 06 From: Mobile, Al Member No.: 1,410 |
First time on r comps.
The front end is chattering in the corner, get on the gas and it fixes it cant carry any entry speed because of it. Tires are BFG R1's, pressures to start are 30F 26 R, end of session 34F 33R. I took the rear spring rubbers out and lowered the rear. The ass end was all over the place, this helped a bunch and dropped 3 seconds off the lap time. Go up or down on pressure or what? You enter the corner, the car starts to push and the tires chatter, skip, gas pedal pedal helps it. All input welcome. My new best is 2:02 at NOLA. |
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Dec 4 2013, 08:54 PM
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#2
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Experienced Member ![]() ![]() ![]() Group: Advanced Members Posts: 1,099 Joined: 14-October 06 From: Mobile, Al Member No.: 1,410 |
I took my spring rubbers out of the rear, it dropped the rear an inch(at least). Made the rear have MUCH more grip.
My axle snubbers have been trimmed about an inch, I can push the car down in the rear with my hands about 1.5 inches and you can feel them hit. How much "free travel" should the rear have sitting still should they have? How far should I be able to push the rear down with my hands before they touch? This post has been edited by FASTFATBOY: Dec 4 2013, 10:51 PM |
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Dec 10 2013, 02:46 AM
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#3
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I build race cars ![]() ![]() ![]() ![]() ![]() Group: Advanced Members Posts: 4,748 Joined: 31-August 05 From: Central coast, CA Member No.: 874 |
I can push the car down in the rear with my hands about 1.5 inches If you can do this with shocks installed then the shocks are shot. With no shocks you can bounce the back of the car pretty good - hitting the bumps stops I think would be easy, but not a good metric for ride or bump stop height. |
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Dec 10 2013, 02:55 AM
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#4
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Experienced Member ![]() ![]() ![]() Group: Advanced Members Posts: 1,099 Joined: 14-October 06 From: Mobile, Al Member No.: 1,410 |
I can push the car down in the rear with my hands about 1.5 inches If you can do this with shocks installed then the shocks are shot. With no shocks you can bounce the back of the car pretty good - hitting the bumps stops I think would be easy, but not a good metric for ride or bump stop height. What about zero rake in the car? I drove it again today with the rear raised even with the front, still good rear grip just not as good as it was (it seems). No longer touching the bump stops on the street. |
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FASTFATBOY Neep some help, front tire chatter how do I fix it?? Dec 1 2013, 12:20 AM
nape Less front roll stiffness > Soften the front sw... Dec 1 2013, 05:21 AM
Blainefab Try backing off the front sb end link nuts a coupl... Dec 1 2013, 06:25 AM
Steve91T I don't think that's enough front tire pre... Dec 1 2013, 06:27 AM
Blainefab With Toyo/Hoosier/Yokohama, starting cold pressure... Dec 1 2013, 08:37 AM
Interceptor QUOTE (Blainefab @ Dec 1 2013, 01:37 AM) ... Dec 1 2013, 03:37 PM
ReEntryRacer QUOTE (Interceptor @ Dec 1 2013, 07:37 AM... Dec 1 2013, 09:17 PM
FASTFATBOY VID
http://www.youtube.com/watch?v=YaCRdy4mBVw...... Dec 1 2013, 11:22 AM
FASTFATBOY Listen at 4:44 and 8:56
https://www.youtube.com/w... Dec 2 2013, 03:56 AM
trackbird QUOTE (FASTFATBOY @ Dec 1 2013, 10:56 PM)... Dec 2 2013, 01:27 PM
robz71lm7 How are your caster bushings??? I've had weir... Dec 2 2013, 07:33 PM
PeteL Loose upper control arm bolts were the cause of my... Dec 2 2013, 09:59 PM
FASTFATBOY All of my front bushings are fine.
Would the 35/1... Dec 3 2013, 04:02 PM
FASTFATBOY Tire pics. They were rotated at the end of day 1.
... Dec 3 2013, 04:04 PM
trackbird QUOTE (FASTFATBOY @ Dec 3 2013, 11:04 AM)... Dec 3 2013, 04:48 PM
Steve91T You're on Strano springs, right? Seems like yo... Dec 3 2013, 05:05 PM
FASTFATBOY QUOTE (Steve91T @ Dec 3 2013, 05:05 PM) Y... Dec 3 2013, 05:24 PM
Steve91T QUOTE (FASTFATBOY @ Dec 3 2013, 12:24 PM)... Dec 3 2013, 06:13 PM
FASTFATBOY QUOTE (Steve91T @ Dec 3 2013, 06:13 PM) Q... Dec 3 2013, 09:50 PM
camarokid91 My car does this in Autocross on low speed tight c... Dec 4 2013, 06:38 PM
trackbird QUOTE (camarokid91 @ Dec 4 2013, 01:38 PM... Dec 4 2013, 08:46 PM
FASTFATBOY QUOTE (trackbird @ Dec 4 2013, 08:46 PM) ... Dec 4 2013, 08:50 PM
ReEntryRacer QUOTE (FASTFATBOY @ Dec 4 2013, 12:54 PM)... Dec 4 2013, 09:54 PM

mr.beachcomber QUOTE (FASTFATBOY @ Dec 10 2013, 02:55 AM... Dec 10 2013, 01:24 PM

FASTFATBOY QUOTE (mr.beachcomber @ Dec 10 2013, 01:2... Dec 10 2013, 01:47 PM
FASTFATBOY QUOTE (Blainefab @ Dec 10 2013, 02:46 AM)... Dec 10 2013, 01:50 PM
FASTFATBOY I put the Detroit TrueTrac in the car, trimmed the... Dec 8 2013, 11:48 PM![]() ![]() |
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