Hey guys I currently have a stock flywheel for my one piece main seal LB9. The stroker I am preparing requires a 2 piece rear main style flywheel. I was looking at different flywheels and was wondering about the pros and cons of a lightweight flywheel. This engine will have around 360lbs-ft at 1600rpm so I doubt it will have much trouble pulling out like is some times the case with light flywheels. I am also wondering if this will help quel some of the wheelspin I will be combating as well. This car's main use is street with a healthy dose of autocross thrown in so the light flywheel will help acceleration off the corners as well. With the amount of street driving this car will see, are there any drawbacks to having a light flywheel? I will be re-using my RAM Powergrip clutch which chatters some and is pretty grabby but holds hard. Will a light flywheel help or worsen the situation. Thanks for any input you guys may have.

 

First, my car is street driven only. That said, I have a 350ci/330hp with a light-weight GM flywheel (and alum drive shaft) with a Centerforce II clutch kit. No problems, though you have to learn to drive a bit differently (the lighter weight flywheel stops spinning more quickly which is noticeable between shifts). If you swap flywheels, I'd suggest inspecting the clutch--it's chattering for a reason.

JamesC

 

The product information on Summits website and in their catalog states that it may chatter. It is organic on the flywheel side and some kind of sintered metal crosses on the pressure plate side. It does not chatter all the time, infact it normally doesn't chatter. The only time it chatters is when you have the rpms up and try slipping the clutch to take off, like if you are sitting on a hill for example. In normal driving it takes off like normal. The clutch is fairly grabby, it does not have much engagement travel, and if you slip it that's when it chatters.