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Old Nov 19, 2003
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Question Flywheel with turbo

Hey Catalyst and SFPower, I have the ACT Prolite 8.4lbs flywheel. Are there any possible problems that can occur when using a lightened flywheel with a turbo?

I have just been notified that Fidanza has released a 6.5lbs flywheel for our car. I would like to change to Fidanza to get as light as possible.

Basically, which flywheel do you think is the best for a turbo setup and why?

A. Stock
B. ACT - 8.4 pounds
C. Fidanza - 6.5 pounds

Thanks, btw......I am also getting the ACT HC5-XTSS clutch.

Thanks for your help.
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Old Nov 19, 2003
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I have the same flywheel too, trust me you dont want to go any lighter. Its allready a pain during normal shifting. Although having a lighter flywheel does make the engine rev easier, thus spool the turbo faster there is such a thing as too light when you have a street car.
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Old Nov 19, 2003
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BTW: stock is like 13.4 lbls
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Old Nov 20, 2003
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Does the car idle ok? Does it have a higher or lower idle rpm?
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Old Nov 20, 2003
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how hard is it driving in rus hour? pain in the *** during stop and go traffic?
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Old Nov 20, 2003
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It idles fine unless you turn the AC on. Its not too bad in trafic accept for the fact that it looses revs very quick, so you always have to "speed shift".
A light flywheel make the power band narrower so If you go too light everytime you shift youl drop out of the power curve.
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Old Dec 4, 2003
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its gonna be retarded getting a 6.5lbs flywheel because you are going to be shifting so quick it aint worth it, i stuck to the 11 lbs act one the flywheel will go and probably ruin your car.
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Old Dec 4, 2003
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Originally posted by Elite
the flywheel will go and probably ruin your car.
How do you figure?
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Old Dec 4, 2003
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Originally posted by RiceBuRNeR
It idles fine unless you turn the AC on.
Why is that? Do you stall out or something? What exactly happens?
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Old Dec 5, 2003
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I could see too light of a flywheel causing at least two possible problems. 1) When you shift very quickly you're putting extra stress on your transmission because of the sudden jolty movements you make with the shifter, or 2) the clutch will go through serious wear and tear if you're not rev matching while shifting every time in normal everyday traffic.
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Old Dec 6, 2003
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i have a 11lb act one.. didnt wanna go lower.. but then again i have another 6 lbs of the crank on the other side of things with my crank pulley... my motor revs like WHOA.. not to mention i never see anything below 7psi if im driving hard... then it goes straight from 7 to 9.. and sticks there nice and perfect.. i LOVE my car!
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