Hey guys I have my engine build and wondering if anyone of you guys have the same spec that I have done. I have put 3mm apex, street port, and lower compression rotors on my FD. I believe the lower compression rotors are from the 87 FC rotors. Now my question if any of you guys have done this before is there any problems with the lower compression rotors, if so would I be able to really tell that I am running lower compression rotors??? Would I have any starting issues???

 

lower comp rotor would have been from a 87-88 TII.

The only other weights besides 8.5 were 9.0, 9.4, 9.7

the thing is the older (s4) rotors which the 8.5's come out of are heavier.

You need too put the appropriate counter weight on.

If you used the appropriate counter weight with an after market flywheel you should be fine. But the stock flywheels have them built in. If you used the FD flywheel and the 8.5 rotors your motor will not last and you are wrong.

you have to use the AT counter weight from a S4.

Lower comps rotors and sp will make it slightly more difficult to start but will start with out too much problem.

you will notice a difference in reving of the motor and low end.