i have a 88 iroc puting a 383 in it is im looking at a 15lbs flywheel from summit but is that to light for my car plans 4 the car is to be turned into a mean steet car if this is to light what whould u sugest

 

if you are gonna be racing it with drag radials or slicks, it will be way too light.. you need the added rotational mass for high-rpm clutch dumps.. those are good for road racing, where you dont need to accelerate from a dead stop.. it will take away some "streetability" because it will allow your motor to rev-up really fast and just be hard to drive everyday.. just stick with the steel.. or if you can find something with around 30lbs, thats a good compromise.. just remember to have it balanced with the rotating assembly

 

I disagree. I'm running the GM lightweight flywheel for everyday use (no strip) without difficulties.

JamesC

 

well there you have it.. street useage.. no strip.. i meant to say, "correct me if i'm wrong" somewhere in my post but whatevers.. all the old-timers at the track say i need a heavy flywheel to launch a heavy car at part throttle on slicks.. or it just makes it easier and more consistant than having less inertia and the engine bogging down and leaving at different rpms.. i have a 3step now so it shouldnt really matter.. pedal is gonna be to the floor anyway..

 

Rule of thumb:

smaller motor, heavier car, highway gear, more traction, softer suspension setup = heavier flywheel

Bigger motor, lighter car, higher-# gear, less tire, harder tire hit = lighter flywheel

There's no ONE right answer. It's a tuning thing. Kind of like the people that post "what jets should I run".... you should run whatever makes YOUR COMBO work better. The guy in the other lane probably needs to run something completely else.