Would appreciate any advice from serious track guys here...THANKS
I am having trouble getting my gen 3 to pull down under hard brakeing with ABS interference and alot of sliding going into the corner before turn in with my new setup.
Ever since i changed to a coilover setup and more aggressive alignment it seems my front tires are either not laying flat or there is not enough weight transfer going to the front tires due to stiffer springs and the weight staying backward.
My new alignment is Front (-1.5 deg) 1mm toe out.....and Rear (-1.0 deg) 2mm total toe in
Brakes are HAWK HP+ on Stoptech Rotors w/braided lines
Tires are Nitto Invo's on stock gen 3 wheels(32psi front 28psi rear)
The only thing i was going to do is buy a new set of Forgeline wheels with a wider front wheel. Will step up to a 305 series front tire and probably going with Michilin Super Sport tires all around. But is my alignment good....I had heavy outside shoulder block wear on the stock alignment/suspension setup at the track before...completely destroyed a nice set of Michilin PS2's due to factory alignment and soft springs. Ran alittle more camber and the wear is better.
Now the car just won't pull down....and i can't just move brakeing pressure to the rear due to the brembo setup on this car....it is supposed to do it automaticly....but doesn't feel like much is happening.....i wish i could adjust the porporting valve and just do it manually.
Need some advice on where to go from here.....THANKS
This is what I am running on my gen 3 and I get around pretty well.
-2.5 front camber
-1.2 rear camber
.2 TOTAL toe in rear
0-.1 TOTAL toe in front
I use these specs for hoosier slicks, A-6's, and Sport Cups.
Steve A.
Quote:
Originally Posted by MambaViper
Would appreciate any advice from serious track guys here...THANKS
I am having trouble getting my gen 3 to pull down under hard brakeing with ABS interference and alot of sliding going into the corner before turn in with my new setup.
Ever since i changed to a coilover setup and more aggressive alignment it seems my front tires are either not laying flat or there is not enough weight transfer going to the front tires due to stiffer springs and the weight staying backward.
My new alignment is Front (-1.5 deg) 1mm toe out.....and Rear (-1.0 deg) 2mm total toe in
Brakes are HAWK HP+ on Stoptech Rotors w/braided lines
Tires are Nitto Invo's on stock gen 3 wheels(32psi front 28psi rear)
The only thing i was going to do is buy a new set of Forgeline wheels with a wider front wheel. Will step up to a 305 series front tire and probably going with Michilin Super Sport tires all around. But is my alignment good....I had heavy outside shoulder block wear on the stock alignment/suspension setup at the track before...completely destroyed a nice set of Michilin PS2's due to factory alignment and soft springs. Ran alittle more camber and the wear is better.
Now the car just won't pull down....and i can't just move brakeing pressure to the rear due to the brembo setup on this car....it is supposed to do it automaticly....but doesn't feel like much is happening.....i wish i could adjust the porporting valve and just do it manually.
Need some advice on where to go from here.....THANKS
What kind of coilover set up do you have and did you have it corner weighted when you did the alignment? Also, needs to have something like 1.5 in rake. Haven't run on Nitto's, good starting tire pressure is 29 all around, then hot pressure at 36 psi (adjust up or down cold). Front's cold at 32 seems real high. Good spring rate (track/street) for a non-aero car is 500 front, 800 rear. I have moton's with 700/1300 springs, 18" forgelines on R-6's, stopetech's with brakeman 3's.
What kind of coilover set up do you have and did you have it corner weighted when you did the alignment? Also, needs to have something like 1.5 in rake. Haven't run on Nitto's, good starting tire pressure is 29 all around, then hot pressure at 36 psi (adjust up or down cold). Front's cold at 32 seems real high. Good spring rate (track/street) for a non-aero car is 500 front, 800 rear. I have moton's with 700/1300 springs, 18" forgelines on R-6's, stopetech's with brakeman 3's.
1.5 in" rake is to much and that's what's causing the lack of rear bias. You should be between .5-.75" rake
1.5 in" rake is to much and that's what's causing the lack of rear bias. You should be between .5-.75" rake
That's why I said to the OP "something" like 1 1/2 , who know's how his is set up? Grabbed the ACR book, rough track recommendation is 1 1/8, smooth is 1 3/8 Hey I was close when I said 1 1/2. Non aero cars surely need less like you said, but it needs to be checked.
That's why I said to the OP "something" like 1 1/2 , who know's how his is set up? Grabbed the ACR book, rough track recommendation is 1 1/8, smooth is 1 3/8 Hey I was close when I said 1 1/2. Non aero cars surely need less like you said, but it needs to be checked.
You could try a little more rebound at the back to slow the rate of unloading the rear tires, and a litte more bump at the front. Non-aero cars on softer springs need a lot of careful thought on damping and driving inputs to make them work well. There's a lot of shaft stroke and body movement to control.
Everything's a compromise. The more initial negative camber you dial in, the less footprint you have to work with under braking. If your favorite track has long corners with a lot of load, then more camber is called for. If you have longer straights and tight corners, you can benefit from a more square footprint under accel/decel.
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96 GTS - some brake and handling mods.
You could try a little more rebound at the back to slow the rate of unloading the rear tires, and a litte more bump at the front. Non-aero cars on softer springs need a lot of careful thought on damping and driving inputs to make them work well. There's a lot of shaft stroke and body movement to control.
Everything's a compromise. The more initial negative camber you dial in, the less footprint you have to work with under braking. If your favorite track has long corners with a lot of load, then more camber is called for. If you have longer straights and tight corners, you can benefit from a more square footprint under accel/decel.
Thanks for all the respones.......i have already softened the compression more and will add a few more clicks of bump now....but i have a feeling things won't change untill i get a wider front tire (305-315) that is a softer compound with softer front springs.....i have the front so stiff right now.....i don't feel any weight transfer going to the front wheels.
I really wish i had the areo package at the track.....that is exactly what i feel i need is more downforce pushing on the front end to flatten the contact patch and pull the car down hard. I guess i realized there is a balance of just how stiff you can go with suspension on a street car and how agressive of a brake package you can run. I need a little more track time to dial it in.
Mamba, you never did answer about the actual coil over and spring set up you have. Let us know and the advice will become more useful. If you are increasing front tire or rim size I would say the 315 is the only way to go, the 305 sidewall is way to short IMO.
Mamba, you never did answer about the actual coil over and spring set up you have. Let us know and the advice will become more useful. If you are increasing front tire or rim size I would say the 315 is the only way to go, the 305 sidewall is way to short IMO.
Ya that would be helpful for you guys.....I am running the Aldan shocks with their own springs they sell them with new....i am currently trying to run down the spring rate of that package.
I initially just wanted to lower my car thats why i didn't buy the moton's or KW's....and now i wish i would of just bought the Moton's for the track time i am putting in.
I haven't blown out any of the shocks yet like the past problems the aldans had....so i know i have the newer design.....and i can't complain about the ride much.....the front just feels much stiffer and the rear feels about the same if not a little more plush than stock on the softer settings.
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