TDC with unknown flywheel
 

Ok I am trying to find TDC and I dont have a stock flywheel i found some write ups on finding TDC and found them helpful but is there a diffrence on finding TDC with the counterweight from using the aluminuim flywheel or the lightened steel one.
How can I find out which one I have without removing the engine or tranny?

here are two pics

You could remove the front e-shaft hub, making sure to take the necessary precautions, and align the key to 9 o clock and stick the hub on, then stick the pulley on with the timing marks at 12 o clock.

ok what are the nessesary precautions? I do have a spare 12a to do a practice run on

Mazdatrix has a faq on the matter. I believe its just wedge something against the clutch so its fully depressed for the duration.

This is to prevent the thrust bearings on the front from falling out of place

Thanks Man

ok so just hold the pedal down with some wood and pull the fron e shaft bolt then line the keyway mark up with 9'oclock and that will be TDC

should be close. do you still have the original pulley?

My pulley was 90* off on the hub so if your pulley has timing marks you want the key at 9, the marks at 12 and that will be close to TDC

https://www.rx7club.com/1st-gen-archive-71/ignition-how-find-tdc-661311/

this talks alot about the flywheel but also mentions the key method