suspension help

[dcino]

i'm becoming a real good drifter , unfortunately this is becoming obvious to me that this is not the fastest way around a circle track.my s-13 is extremely loose i can hardly step on the gas without spinning out. remember i am only turning left i've tried the tire pressure thing and spring rubbers. anyone got any ideas?

[0wn3r]

i'm becoming a real good drifter , unfortunately this is becoming obvious to me that this is not the fastest way around a circle track.my s-13 is extremely loose i can hardly step on the gas without spinning out. remember i am only turning left i've tried the tire pressure thing and spring rubbers. anyone got any ideas?

What kind of diff?

[nissanman04]

What is your sway bar setup? try going with a softer bar / no bar in the rear.

[crackler]

Whats your set-up?ShocksSpringsSway'sbushingsdifftirespressuresalignmentstaggered setup for circle track??????????

More info would help.

Dirt or asphalt?
Modified by cracker at 9:39 PM 7/31/2008

[dcino]

THIS IS A 1/3 MILE ASPHALT TRACK USING STOCK SUSPENSION WITH RUCUS AND A SLIGHTLY SHORTER AND STRONGER REAR SPRINGS POSITIVE CAMBER BOTH SIDES

RUNNING 205 60'S ON THE RIGHT AND 205 55'S ON THE LEFT

STAGE 3 CLUTCHONLY ALLOWED OPEN DIFF.TRIED ALL KINDS OF TIRE PESSURES AND SPRING RUBBERS IN THE FRONT15/2010/12 SO FAR BEST RESULTS BUT NOT EVEN CLOSE TO WHERE I HAVE TO BE

[crackler]

I assume this is a banked track, and that the rear of the car drifts up the banking, so you would have to counter steer to the right? (I bet that is exciting on a circle track!)

THIS IS A 1/3 MILE ASPHALT TRACK USING STOCK SUSPENSION WITH RUCUS AND A SLIGHTLY SHORTER AND STRONGER REAR SPRINGS POSITIVE CAMBER BOTH SIDES

So you have a higher spring rate in the rear than the front? How much more do the spring rubbers bump the front rate?

Is the car lower in the rear than the front?

Positive camber???? I assume this is common for circle track racing? Is the positive camber just in the rear?(I have no experience with circle track so excuse my ignorance.) Most the time on an autox / road course people run negitive camber at all four corner. I have never heard of people running positive camber, but like I said I am not famielure with circle track set ups. I am wondering if you should maybe have one side negative (drivers probably, since it loading the that side more than the right side) if not both. But that is just a guess.

What is your toe set at, front and rear?

Quote »RUNNING 205 60'S ON THE RIGHT AND 205 55'S ON THE LEFT[/quote]This is to get the car to turn left, correct? I doubt that is an issue.

Quote »STAGE 3 CLUTCHONLY ALLOWED OPEN DIFF.TRIED ALL KINDS OF TIRE PESSURES AND SPRING RUBBERS IN THE FRONT15/2010/12 SO FAR BEST RESULTS BUT NOT EVEN CLOSE TO WHERE I HAVE TO BE[/quote]The clutch and diff shouldn''t matter.

Try going the other way with the air pressure. run lower pressure in the rear compaired to front. I ran about A 2 to 4 pound split on my 240 from front to rear. So if I had 36 in the front I would have 34 to 32 in the rear.

You might try runinng stiffer springs in the front and the stocks in the rear, or leave the rears alone and run even stiffer in the front. Not sure what kind of split the 240 guys are running in spring rates front to rear. I know the spring rubbers should raise the front rate, but I am wondering if they are raising them enough in the front comaired to the rear.

I would be courius to compair your camber and toe at all for corners to what the fast guys are running (Assuming they all don't have live rear axles). Are there any local guys / shops that have a good knowledge on what a good base set up for a circle track car should be. And I mean some one you trust / respect. I have no real suggestions due to my lack of circle track exerperence. Are there any good circle track forums?

The only things I know are left / right set ups

lower rear air pressure compaired to the fronthigher spring rate in front compaired to the rearlarger sway bar in front, if you have enough roll resistance from your springs remove the rear bar possibley (the stock springs aren't nearly strong enough to remove the rear bar) Although, you may try removing the rear bar to see if freeing up the rear tires allows you to maintain rear grip better. You will have more body roll, but as long as you are smooth and the rear rates are strong enough it souldn't be to bad (do this at your own risk).negitive camber (front and rear)

That is all I can think of off hand. My main suggestion is to find out from the local guys (The fast one's)what they are running. If possible find some one with a similiar weight / IRS / RWD car. The guys with Live axles aren't going to be much help, at least on alighnment specs. Good luck.

I know a guy who use to run asphalt circle track, I'll try and pick his brain on where a good starting point should be.

[dcino]

THANKS, no one is really running rear wheel drive cars so there is no one locally to pck there minds. and sorry i am running negitive camber on all but the left front wheel which is set at factory specs. i'll remove the rear sway bar just to see what kind effect this has it seems like that will be the easiest/cheap change i can make. i'll keep you posted. and will adust the tire pressures around that for awhile.your right is is fun but scrubs alot of speed off when you are trying to go in a straight line.thanks for your input

[crackler]

Your not taking advice for air pressure from those FWD guys are you?

Good luck.
Modified by cracker at 5:26 PM 8/1/2008

[dcino]

NO WE ARE WAY BEYOND THAT.

[crackler]

lol

Did you race this weekend?

What class do you run in anyways? Pony stock?

[dcino]

JUST AN FYI WE HAVE MOVED OUR TIRES AROUND TRANSFERING THE 205-55,S TO THE REAR WHICH ,I GUESS IS TRANSFERING MORE OF THE WEIGHT TO THE REAR. THIS SEEMS TO HAVE ADDED GREATLY.THANKS FOR YOUR INPUT