I'm not sure what effect a lighter flywheel will have with the supercharger. I don't launch the sand rail but use the throttle continuiosly to steer with the rear. 1700 lbs car and no stop and go traffic. Good idea or bad to have a local machinist trim a few pounds and how much?

 

I wouldn't machine anything off of the oem. I'm sure it can be done, but I wouldn't. There are aftermarket aluminum options out there if you want to go down that road.

 

Fidanza makes an aluminum flywheel. Can get em through zzp.

 

Do not machine an oem flywheel at all. The tolerences can easily be blown even by an experienced machinest. There just isnt enough meat there to make it worthwhile. Spec makes a good quality aluminum flywheel and are far superior to the fidanza

 

I just looked at it and there is not much to machine if any. Spec does not list a 2.0 flywheel only a 2.2L.

 

one problem you can run into is it will make the flywheel bolts go deeper in through the crank and then they could hit the main bed plate and damage it and lock the engine up

 

look again. They do

 

 

SPEC Aluminum Flywheel LSJ 04-07

 

I called there tec and yes they have them. He talked me out of it because of the power sucking tendency of the sand. In other word it would fall flat on its face every time I got out of the throttle. That's kinda what I wanted but just a little bit. I don't run turning brakes but instead go in hot and let off the gas as I initiate a slide. You have to slide or it won't turn. The V8 cars can't keep up in the turns but run me down on the straights so I gotta go fast as I can in and out of the turns. Spec said they work well on high tourqe engines but on small engines the negative tendency of a light weight flywheel is more noticeable. IDK it's just this car is lite, dialed and super fast compaired to a lot of expensive cars and they gun for me constantly. I've got to improve it so I can stay out front. Maybe I'll hook the laptop up and slow the idle unless you can think of a way to increase the response of engine breaking so I can stay in the throttle longer.

 

What do neutral balance shafts do as far as my questions? Any effect?

 

I don't think it would hurt you that much, especially you say you need to modulate the throttle a lot, so it should help the drivetrain spin up faster.

For what it's worth, from a road racing perspective, I went from a ~15lb stock flywheel to ~8.2lbs on my Toyota Echo and it made a noticeable difference; the engine started and revved up noticeably quicker, and was a definitely easier to shift quicker, especially when no lift shifting or heel toeing.