Rebuilding an S5 TII engine, and changing the rotors to S4 TII (8.5:1) rotors.
I know I need to change the counterweights as well so everything stays in balance.

Is there anything else that needs to be done to the core when changing to these rotors for everything to work properly?

I will be installing a lightweight flywheel as well, but I'm not exactly sure which flywheel or what weight it will be.
Does this impact what I'm doing? Can I still go ahead and swap on the S4 front counterweight, and I won't have to change it when I change flywheels?

(tried searching, found lots of topics, but didn't answer questions good enough)

 

I know what I did most every body will jump on me so dont try this at home, side houseing 12a and the biggest ports one can get, 2mm rotors think they are 87 one mybe the other ?, the shaft came with the car 76 RX4, the fly wheel it fits, turbos twin 626, VW fuel injection two of then. It fits it goes on, RUNS DAM GOOD

 

i don't understand you just got bits and smaked the whole thing together... thats gold

 

Yes, change to series 4 (turbo or non-turbo) counterweight and flywheel. If you're using an aftermarket flywheel, use any of them that are sold for Series 4. Nothing else has to be done to the core.

B

 

Hi Brian!

Still got my TII GTR motor in your FC?



John Vitamvas
-95 M3