Just found the formula dudes link..cool..I have a 312 w/454mag mpi's.. Bravo 1's 1.65... I'm running the Bravo1 props 28p and WAS bouncing on the rev. limiter.
I just pulled of the stock exhaust and silent thunder and put on EMI offshores with S/S risers and Teaque 450 tips w/ the switchable baffle inside. Also added the Vortech Breathers and had some ECM work done..( can't wait to test)

IS there anyone out there who is running 30p's or ??? with a sim set up.. I heard Formula went to 30p in 98 the year after mine..

That boat came with 30's behind the 454 mags and 502's.....with your upgrades it seems you might spin them. If they are a little big then you could always lab them to help get to proper rpm.

Good advise! My '97 312 had the 454PMI (not the MAG) and had the 28's on it. The 30's labbed would be perfect for you!

I have a pair of labbed 30's in the classified section that came off my 312 that are for sale that are in excellent condition, I was turning them @5150 rpms..........