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Engine Specific Info and Questions => IDI Engine => Topic started by: foxracer1 on October 10, 2008, 12:01:12 pm

Title: Lightening flywheel
Post by: foxracer1 on October 10, 2008, 12:01:12 pm

What have you done and/or what would you do. Sport/street driving.

How much does a factory one weigh? I can turn flywheels down and have a place to balance them. If enough people wanted them i thought i could have a few done to have to turn around.

Title: Lightening flywheel
Post by: zukgod1 on October 10, 2008, 12:05:49 pm

I think unless your Road Racing your car one weighing around 8-10 lbs would be good.

Just for off the line torque though. Once it's spinning I doubt it matters.

I have an aftermarket lightened one on my car but I cant tell a difference between it and the OE one.

Title: Lightening flywheel
Post by: Jettagli16v on October 12, 2008, 01:47:48 pm

Correct me if I am wrong (usually am)
but the lightened / balanced flywheel should help you rev up quicker,
but not actually improve HP. (Had a 10# one on my 98 8v GTi)
After I put it on, my 2.slo felt like a crotch rocket!

For the top end, you really want the momentum (rotational inertia).
A friend put one on a vr6 turbo, and felt like it hurt his pulling power.
The motor revved down so quickly, he was losing boost in between shifts.