MC21 vs. MC28 flywheel timing

**Sat Dec 09, 2006 7:53 am » Post: #1 » Download Post**

does anyone know the degree difference between the timing of the flywheels? I think MC21 is advanced but I would like to know by how many degrees.

much thanks, Scott

**Sat Dec 09, 2006 12:58 pm » Post: #2 » Download Post**

'21 is definately more advanced, no sure how much by, but a PGMIV with a '21 flywheel would appear to be still be retarded (no jokes please Andy, Steve, Matt etc) compared to the PGMIII I'd say from the results seen on dyno's.
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**Sat Dec 09, 2006 8:11 pm » Post: #3 » Download Post**

If you're thinking of running the '21 flywheel with the 010 card you have, then I think it'll go pop of sure. Matt's your man for this type of stuff. I've been running the 300 with a '21 flywheel to give it a little more advance, but think i'll only give about 3-5 more gee-gees. Well that's what he told me.

So.............. in answer to your question, i don't know.

**Wed Dec 13, 2006 2:09 am » Post: #4 » Download Post**

Without the proper 'scope for measuring it I can't be 100% accurate, but you're looking at 1~1.5 degrees more advance with the 21 flywheel compared to the 28.