Supercharged FC

iTrader: (7)

Is a N370 flywheel for S4 or S5?

I think I s4 internals, but I have been running an N 370 flywheel for 8 years without any issues. If a N 370 is for S5 and it worked on my car I should get an S5 counterweight right? Does the rear counter weight just need to match the front counter weight, or does it just need to match for the rotors, or do they all have to match? My friend put a S5 counter weight on an S4 (sorry J funk) and it ran like ****, so if I have been running the wrong flywheel for 8 years I would know right?

Please advise!

87 t-66

iTrader: (133)

n370 is s5 t2. the flywheel needs to match the rotors and front counterweight.

Supercharged FC

iTrader: (7)

So is there any chance I ran for 8 years with s4 rotors and s5 flywheel and didn't have any issues?

To put this into perspective I been down the 1/4 20+ time hitting 8000 rpm, driven 40K miles, and ran 12 or so autocross with no issues. I blown up a supercharged with nitrous back fire, caught on car fire once, ran through the Appliacian mountains on my trialing coils (THAT SUCKED), ran a 13.5 1/4 this summer at about 10 psi, drive the **** out of my car and it runs great and idles at 800 rpm fine.

This leaves me with two options
A. You can run s5 fly wheel if the front counter weight matches
B. I have S5 internals (I help put my engine together 8 years ago, I pulled the rotors out of a box marked S4, which I bought form a guy who told me they where S4. The flywheel on the other hand came free with a trany I bought and I don't remember checking the part number (I was was in a hurry to finish the car)