RobsZ28

iTrader: (3)

I'm looking for input from others as to which front spring people are using on a mostly track car with a little street driving and if they're happy with the spring they chose.

I am going to be ordering a set of Strange single adjustable shocks for my car and either 275 or 300lb springs. With in the next few weeks I'll be ordering tubular control arms and K-member along with removing as much weight off the front of the car as I can. Since I am taking weight off the front of the car I don't want the front end to sit 4" over the tire which is one reason I was set on the 275's. I've had a PM conversation with ssvert99 about this. I was originally set on getting 275 spring but he has me second guessing and now unsure.

Would a 300lb spring help more to keep the front end up and transfer weight to the rear better then the 275 would? Would a 275 spring cause the front end to slam down harder if the car does a wheelie since the spring would be easier to compress? Anyone running 275lb springs with iron block engines or very light weight reduction and happy with the suspension set-up?

Ed Wright

iTrader: (1)

300 lbs will only help your rear tires spin.

I have used 250 & 275, and 330 lb springs. 250 hooked best, 330 worst. Difference was very noticeable. Average weight, 275 would be my choice.
Light car, no AC, etc, should like 250 lbs. if you order AFCO shocks, do NOT listen to the telephone salesman passing himself off as a tech advisor telling you they should be 330 lbs. Ask me how I know. LOL
Big mistake.

Mighty Whitey

I'm running an lq4, no ac, ps, tube k member and a arms, strange SA with stock 275lb springs. Right now, it seems to do fairly well. I have the front end set down fairly low (fender is 1" above tire).
I have done a rolling burnout right before a roll race (gay, I know, since I have a stalled auto, Smh...) and after lifting off the throttle and holding the brakes I have indeed drug the headers on the pavement.

Car seems to work really well tho, pulls the left front about 8" and carries it out for 30ft and sets down softly to a mid-1.4 60'

I'm with Ed, I think a 250 spring would be better, but fairly soft for anything but drag use.

RENE'S RAGE

iTrader: (96)

275 spring.

Ed Wright

iTrader: (1)

If you have a full weight car, you are correct.

RENE'S RAGE

iTrader: (96)

My opinion, a 275 would be too soft in a full weight car.
Most people run a 300 in a full weight car.

Ed Wright

iTrader: (1)

Most people I know would not agree with you. Guess it depends on what your doing.

BMR Sales2

iTrader: (40)

We like to use 300lb for a full weight car or even a car that has a little weight reduction off the front of the car. For example I have a local customer here that I help set up his car that has a 99 T/A with a nitrous assisted iron block stroker motor, BMR k-member and no A/C and he uses a 300lb spring with Strange single adjustable shocks on the front of the car and it regularly cuts 1.33-1.35 60ft times.

The only time we generally recommend anything beside 300lb springs is when there has been a considerable amount of weight taken off or added to the front end.

Ed Wright

iTrader: (1)

Soften up the front springs, and maybe it would 60' in the 1.20s like my little 350" NA car.

RENE'S RAGE

iTrader: (96)

Ed, I have great respect for you.
And I appreciate your knowledge about racing.
But sometimes, I think you "think outside the lines" alittle when it comes down to the
average F-body crowd. Most people goes by what has worked well in the last 10 years with these cars.
I know you race NHRA and have many friends in the business,
but that's a whole different world.

BMR Sales2

iTrader: (40)

Nah, it is a street car so we don't have any interest in throwing a softer spring in the front of the car.

TurboStangJON

iTrader: (27)

I agree Ed, most people who race these cars in competition don't run the typical LS1tech spring rate. We need an advanced drag racing section to weed out the street cars. I guess that's what Yellowbullet is for...

RENE'S RAGE

iTrader: (96)

I don't race on the street.

NW Iowa WS6

iTrader: (9)

I just switched to 275's from 300's because after AC delete, chromoly kmember, and rear mount battery the car raised over an inch and lost alot of "stored energy" and got very stiff feeling upfront, I'd go 250's if I had a more dedicated track car

Mighty Whitey

I'm about to swap in an ls2 block in my car and I can already tell I'll be wanting a softer spring up front (car is getting more race oriented as well)

I envy you ls1 block guys, and your light weight over the nose....

RobsZ28

iTrader: (3)

Thanks for the response guys, I'm going to order 275's since it's not a full competition car and see's about 500-800 miles a year street use.

RENE'S RAGE

iTrader: (96)

What did Eric recommend?

RobsZ28

iTrader: (3)

275's would be OK only if front end weight is reduced enough, I stay with aluminum block and wont be adding weight back on with a supercharger or turbo kit. Other than that the 300 are usually the most popular choice.

Reject

iTrader: (24)

so here is a question for you all, what WEIGHT (like actually putting the car on the scales and getting a front/rear number would determine getting XXX pound spring vs XXX pound spring.

i know people are saying yeah i removed this but then added this and moved this here and all sorts of different things, but that is just ball park figures. Id like to know what each spring would be ideal for a set amount of weight in the front.

Kingsize

iTrader: (13)

I like an extremely light spring (between #225-#250) for a dedicated track car, even without extreme weight reduction. I can control compression with my dampening settings with a dual adjustable, as well as allow for a quick rebound for the holeshot. An overly heavy spring has a lethargic reaction, and really leaves much to be desired for weight transfer.

Obviously if it is not a dedicated track car, compromises will have to be made for street use.

JMHO