Twin turbo car--lightweight flywheel or not??
 

I currently have a 15.4lb Chromoly flywheel that needs to be surfaced...OR would a 25-30lb billet steel be better for a turbo car? (408 CID) I just firgure the heavier flywheel would help with turbo spool/launches and be better/easier to drive on the street...

168 tooth, right? Not at home to count the teeth. I just see a good deal on a 30lb SFI steel flywheel i'm thinking about getting. 30lbs sounds really heavy though....

I'm no expert on the matter, but there are 18lb flywheels out there. Maybe a good middle ground for you?

For the small weight difference and the $$ I would have to pay I'd keep the 15lb'er. The 30lb SFI approved one I can get for around $150 (168 tooth). My chromoly one was $200 and any other one I've found are $300-400.

The heavier the better on a turbo setup. This isn't an NA Honda S2000 build.

I am going to be procharging my car in the next month or so. Need a clutch anyway so timing is good. What is the downside of going with a light weight flywheel? I would think it would allow engine to rev quicker. I guess they are harder to get out of the hole if your race a lot. I am no expert so I dont understand why.

Its different for supercharged car than turbo, don't have to worry about spool. The downside for you would be launching at the track....the motor would have more of a chance to bog off the line with the lighter wheel.

boosted cars like the heavy flywheels because it keeps the motor in boost better when going through the gears without having to no lift shift, if you're going with a supercharged setup I would just go with a good quality flywheel and not really worry about weight a whole lot, im personally a fan of heavier flywheels as they tend to not break quite as often

Good points and that does make sense now that you put it that way. Dont have to pay the extra cash for the light weight too is nice.

Any other opinions or facts keep them coming for boosted cars but specifically turbo for the OP. Thanks.

Supercharger comments too if the OP doesn't mind the high jack.