Factory 9 leaf spring
Thread Starter
Instructor
Joined: Feb 2009
Posts: 141
Likes: 0
From: Greer SC
Factory 9 leaf spring
My car was the base drivetrain car. 350 200 hp auto with 3.08 gears. Over the past few years I have rebuilt the front & rear suspension back to factory specs other than the adjustable strut rods. I put back a brand new 9 leaf spring. This past year I was rebuilding the engine but decided to increase the horsepower to the engine. I used the Comp Cams 274 hydraulic flat tappet. I put the Headman ceramic headers, edelbrock original torker intake with a Holley Street avenger 670 carb. I'm in the process of getting an MSD Destributor. I have the 6A box. Plugging this in to Desktop dyno just for giggles it says possibly around 330 hp at the fly wheel and assuming thats gross. The base 350 was 270 gross. I have thought about eventually changing the cylinder heads for more power. Should I go back and change the leaf spring and if so to what spring rate? Are there any other suggestions to also keeping the rear of the car from any other damage from increased horsepower?
Former Vendor
Joined: Apr 2009
Posts: 766
Likes: 3
From: Charlotte North Carolina 704-394-5150
You are not increasing it enough from factory top really worry about it....in my opinion.
Just make sure that you have good universals, ( I personally like the solid Spicers (part # 5-799x) for the half shafts. Can not remember the number for the drive shaft. Do not worry about the rear spring for the same reason above.. If you need info on it call Vette Brakes and Products 1-800-237-9991 and discuss your intention on driving style and what you are planning on doing with the Corvette and they can offer their suggestions on front and rear spring rates and shock absorbers.
"DUB"
Just make sure that you have good universals, ( I personally like the solid Spicers (part # 5-799x) for the half shafts. Can not remember the number for the drive shaft. Do not worry about the rear spring for the same reason above.. If you need info on it call Vette Brakes and Products 1-800-237-9991 and discuss your intention on driving style and what you are planning on doing with the Corvette and they can offer their suggestions on front and rear spring rates and shock absorbers.
"DUB"
