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Old 08-24-2010, 09:50 PM
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Originally Posted by Mikey 97Z M6
Tire pressure didn't make any difference. I tried as high as 22 and as low as 14 before the tire started to slip on the wheel. The 60' seemed to like 15 the best. Part of the problem was the short sidewalls on the 26" tires. I run 28" (s) now with Afco d/a's.

Mike
I think you're right on. I had this issue with my ET Streets at 14 pounds, crunching the sidewall and unloading, and those were 28x12.50 (10.50) with QA1 12 ways on 7. Stick cars need a DA on the rear to control that hit. AC... even when you go auto i'd stick a stiffwall slick on there, or if you want the QTPs throw a tube in there.
Old 08-24-2010, 09:52 PM
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Originally Posted by 98blueSScamaro
Ac here is some info. When the car has the first hit (you letting the clutch out) you want the tire to take the shock. Not the shock. Thats why with a well setup car off the line you will see the tire and rear and the body push away alittle bit. I know your m6 But watch this vid Of chris right at 2.15 sec to 2.16 you can see what i am talking about.http://www.youtube.com/watch?v=iYq4bOPDoaU

But alot comes into play. How the car sit's TQ arm angle LCA angle's and so on. Best way to get the car to hook Is find the live center of the car. Soon i will be doing this to my car. And scaling it.

And Steve Madman Whats the best way to go about and setting up the live center of a m6 Car??? I am new to this but I am learning.
Thanks for the video. It appears as if the body of the car is lifting in the rear on the take off.
Old 08-24-2010, 09:59 PM
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Originally Posted by Wicked94Z
I think you're right on. I had this issue with my ET Streets at 14 pounds, crunching the sidewall and unloading, and those were 28x12.50 (10.50) with QA1 12 ways on 7. Stick cars need a DA on the rear to control that hit. AC... even when you go auto i'd stick a stiffwall slick on there, or if you want the QTPs throw a tube in there.
And yes Any car that is hitting the tire hard or any car over 3100lbs i would run a stiff side wall
Old 08-24-2010, 10:00 PM
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Originally Posted by 02sleeperz28
Thanks for the video. It appears as if the body of the car is lifting in the rear on the take off.
Thats what mine used to do. Just found the old springs ill go to work on it soon.
Old 08-24-2010, 10:03 PM
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Originally Posted by AChotrod
Thats what mine used to do. Just found the old springs ill go to work on it soon.
And ac just so you know i run the stock in the rear and they work great.
Old 08-24-2010, 10:05 PM
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Originally Posted by AChotrod
Thats what mine used to do. Just found the old springs ill go to work on it soon.
Well get those springs back on ASAP. lol Take a video of it if you can.
Old 08-24-2010, 10:07 PM
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I just didnt like the ride height but now I think I need it no matter what.
Old 08-24-2010, 10:09 PM
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Originally Posted by AChotrod
I just didnt like the ride height but now I think I need it no matter what.
raising it will also add antisquat and change instant center.
measure the angle of your lca's before and after
Old 08-24-2010, 10:11 PM
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Will do!!
Old 08-24-2010, 10:12 PM
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Originally Posted by AChotrod
I just didnt like the ride height but now I think I need it no matter what.
Vid of my pass
http://s27.photobucket.com/albums/c1...ueSScamaro.mp4

And pics of how my car looks with stock springs uncut.
Old 08-24-2010, 10:18 PM
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The vid was old and definately discussed in his thread, those tires are really low and that was his biggest problem.
Old 08-24-2010, 10:18 PM
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pics of my car
Attached Thumbnails Damn suspension!!!!-dscf0540.jpg   Damn suspension!!!!-dscf0539.jpg  
Old 08-24-2010, 11:19 PM
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Springs are in hope it settles a bit, gonna check the front shocks now.
Old 08-24-2010, 11:46 PM
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Ok I must be crazy but it does say comp on the alum ****, maybe I didnt know or got confuzed which **** does what. Anyways it was set 6 clicks to the right on comp and 2 on the plastic **** I set it at 9 comp and 0 rebound. Hope that helps with the bottoming in the front wheel well.
Old 08-25-2010, 12:53 AM
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just turn the same two up and then push down on the car. not hard to feel which one does compression
Old 08-25-2010, 06:14 AM
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You can use the springs you want. Just throw in a set of air bags and you can adjust your ride height and stiffness at the track with just the bags. $100-easy :wink:

With a drag bar just be sure to run 2 separate fill lines so they don't share air.
It's a good alternative I think to guessing on a rear spring rate/height. I use them in my car. 1.29 60's
Old 08-25-2010, 10:53 AM
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98bluess Car looks good!

Tektrans If the stock springs dont work out and I just cant stand the look anymore airbags are in the near future.
Old 08-25-2010, 11:13 AM
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you guys and your aftermarket rear shocks & springs...

sorry had to haha

a4 life is alot easier, but my car is rockin a truck 4x4 ride height
Old 08-25-2010, 11:17 AM
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Originally Posted by 98blueSScamaro
pics of my car
i can't wait to tear into her soon
Old 08-25-2010, 12:08 PM
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Originally Posted by 98blueSScamaro
Ac here is some info. When the car has the first hit (you letting the clutch out) you want the tire to take the shock. Not the shock. Thats why with a well setup car off the line you will see the tire and rear and the body push away alittle bit. I know your m6 But watch this vid Of chris right at 2.15 sec to 2.16 you can see what i am talking about.
A clutch car does the exact same thing as the car in that vid you posted (anti-squat, also called separation), it just happens much more quickly and violently. If I posted up that vid of mine at normal speed you wouldn't even see that the tire is being flattend out. That is why it's more important to have a good d/a shock on a clutch car. You need to have the capability to slow down the compression once the tire plants so that it doesn't bounce up and unload as quickly. In the case with my video, you can also use the d/a shock to control how hard the tire plants by stiffening up the rebound (extension).

Mike


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