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1981 engine performance modification

M

Montreal

Guest
I'm pretty new atbeing a corvette owner, however I have a stock 1981 with exception of: Hooker Headers, true dual exhaust, no cat, and DynoMax Super Trubo mufflers. There is a slight gain in power however I would like to increase HP a little more (at low-end) (get some good kick of the line).
I was thinking of bringing the compression ration to 9.5:1, Edelbrock intake manifold with matching cam, rebuild stock carb, maybe a shift kit (have auto transmission)

Anyone have any good advice, I am at a loss....Need Advice!!!!
 
C

cmegga

Guest
The best thing would be a cam and alum. set of cylinder heads. I also unhooked the computer, threw in a msd ignition, with an edelbrock carb and manifold on my 81 . If youve lost the emissions on your exhaust already you may want to drop the air pump as well for some more extra power. Ive done quite a bit and still have a hard time getting "that low end kick". The only real way to get off the line power on these cars is in the rear end gear. I have about 375 hp and I can barrly spin them off the line. However I can cut them louse anywhere over 15 to 55 mph with ease.

Depending on how far you want to go you may want to look at a bottom rebuld as well. Especally if you change or boar the heads. I started with just the top half on my rebulid and 3 week later it burned up my crankshaft and bearings. I cost me about an extra $1200 to pull the engine and go back threw, plus the $1500 I had to out into the engine block.
 
Joined
Nov 4, 2000
Messages
946
Location
Scottsville, Kentucky
Corvette
08 Jetstream Blue Z51 coupe
cmegga has it exactly correct. Stock gears for the automatic in 81 were 2:87, hardley hole shot gears. I have a shift kit in my TH350 it does help, but if your looking for quick out of the hole you will need to be in the mid to high 3: for rear gears.
 

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