Organized Drag Racing and AutocrossDrag racing and autocross discussions and questions. Techniques, tips, suggestions, and "what will I run?" questions.
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ok ive been searching for a bit now and havent found anything related to rear springs. im looking to stiffen up the rear suspension even more. i have lcas, relo brackets, tq arm, parhard bar, spohn sway bar. i was wondering what springs you are using to stiffen up the rear. car is mostly used for drag racing.
let me know. i really dont feel like spending the money on spohns coil over kit.
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__________________ 92 camaro rs
mods:
ls1/t56
some bolt ons
some suspension stuff
strange 12 bolt 4.10s
11.9@118.0 1.6 60'
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I had the same problem when doing the rear suspension on my car, the stiffest thing that I was able to find was stock Z28 springs. I have heard that if you check with the dirt slingers that there may be some options out there that would work. Maybe check out SPEEDWAY???
running stock v8 springs with 1/2 coil removed and the heater hose mod. More than adequate for what I'm doing. I also run 2 air bags instead of an anti-roll bar for now as the car isnt coming out of the hole hard enough to warrant the bags not working. More pressure in the pass. airbag than the 5 psi in the drivers obviously.
__________________ my car thats never done
"I'd rather be judged by 12 than carried by 6"
First Place Camaro Modified Thirdgenfest '05, Second Place Camaro Modified Thirdgenfest '06, Best Modified Camaro Thirdgenfest '07 , Second Place Camaro Modified Thirdgenfest '08
MFBA March 2008 Featured Calendar Vehicle
Springs only need to support the car at it's ride height. Squat and anti-squat is controlled by the shocks. Took weak of a spring and it can become completely compressed and the shock can bottom out. Too stiff of a spring and it won't compress enough to allow squat which you want for drag racing.
I ran V6 springs in the back of mine for years before switching to coil overs when I did my back half.
The first coil over springs I used were 150 pound spring rate. I now use 110 pound.
Stiff springs are good for road course or autocrossing because they won't compress as much when all the vehicle's load is put on them going around corners but a stiff spring is no good for drag racing.
__________________
87 IROC-Z
All engine, no power adders! Bests: 9.348@144.71
thanks for the info. here is my problem. i have 28x12.50-15s with 15x10 5.5bs. well the clearance on the outer fender well seems to be way to close even after i rolled the fenders. on the inside ive done a decent job with a hammer on making room. my father seems to think that i am going to make contact when i launch out of the hole.
i was leaving pretty hard before. enough to pull the front wheels on 255 drs. but i wanted more traction so i went with these huge tires. i have lakewood 50/50s and stock rs v8 springs. if you want i can post pics of my clearances and let me know what you all think. let me know.
__________________ 92 camaro rs
mods:
ls1/t56
some bolt ons
some suspension stuff
strange 12 bolt 4.10s
11.9@118.0 1.6 60'
imo, a properly setup car will push the wheel/tire AWAY from the car on the initial launch. you do not want the car to squat in the rear.
thats a pretty massive tire. i would look into running a 28x10.5.
this will sound funny, but im running a set of fox body mustang springs with a spring rubber (spacer), got the ride height where i needed it lol. 1.25 60 foots on stock suspension, just watch for the sky sometimes!
imo, a properly setup car will push the wheel/tire AWAY from the car on the initial launch. you do not want the car to squat in the rear.
thats a pretty massive tire. i would look into running a 28x10.5.
Actually, thats not an opinion thing, but rather a fact.
Squat means the rear axle is pulling up & away from the ground, which is why the car squats.
When the axle is pushing DOWN, into the ground, pushing all the engines power into the ground, the rear of a car actually lifts.
Front end rise you want, rear end squat you don't want.
If properly setup, there will be an action and reaction. The first action you want is squat which will quickly be followed by anti squat.
The back of the car will drop as the front end rises. As the weight is being transferred onto the rear wheels, they should dig in and push the back end of the body back upward as the diff is being forced downward driving the tires into the ground.
im thinking thats a 4th gen rearend. youve still got tons of room with bumpstops still in there. i had to remove all that mess from my car. i am running 28x10.50 hoosiers on 15x10's. 5.5 bs.
if that is indeed a 4th gen rear, you could go to a 6.5 or possibly 7.5 bs wheel to put the tire back inside the wheel well some.
5.5" backspacing for a 10" wide rim is correct for a stock width diff. Is your 12 bolt the width of a third or fourth gen diff?
I think you have lots of room.
im going to call strange about the dimentions and make sure its the same as stock. it may be the rims as well. greg welds im also running lt1 rear disc brakes which is apparently "impossible" when using greg welds. lol.
Quote:
Originally Posted by DIGGLER
im thinking thats a 4th gen rearend. youve still got tons of room with bumpstops still in there. i had to remove all that mess from my car. i am running 28x10.50 hoosiers on 15x10's. 5.5 bs.
if that is indeed a 4th gen rear, you could go to a 6.5 or possibly 7.5 bs wheel to put the tire back inside the wheel well some.
i was thinking of moving to a 6.0 or 6.5 my friend has a 6.5 on his thirdgen maybe i can get him to let me test fit his rim and see if it hits.
ive done multiple burnouts and launches in my driveway and it doesnt come close to rubbing at all from what my friends were checking for while i was doing so. but going to the track the car will leave harder and the tires may contact correct?
this is a vid of one of my cars passes from last year. if yours behaves similar i dont think youll have a problem. other than the tires sticking way out of the fenders. 1988+Trans+am+GTA++goes+10.14
well i can tell you my car doesnt lift that high off the ground. lol. i have yet to hit the motor with the 300shot thought. lol. this is a video of my car with 255 drs on it. and then my car this past weekend messing around in driveway.
u me and the tree!!!
, Second Place Camaro Modified Thirdgenfest '08
