Im almost done with my build. 462ci, Bob m cam, 781 heads, with forged domed pistons 13.8cc.. 750 holly, sm exhaust, .027 head gasket, around 9.25 compression, +/- 500 HP Where do you guys think i will be with a prop? Its a 1989 24 Pantera. Had a 21 with prob 360 hp before.
i was thinking at least 23, do they make a 24?
thanks

What drive are you running?

If you go from 360hp to about 500hp then its about and 800rpm gain if you kept the same prop. Being 500hp, you probably want to spin the engine at a higher rpm than you were.

If you switch to a 23" prop, you will still be reving about 400rpms higher than you were. It all depends on what you target rpm is compared to what it was with the old engine.

Use BBlades test program.

i was running a similar set up and ran a 25 four blade

25 4 blads seems big, what rpm and speed were you getting??

I havent talked with bob m yet about what max rpm he recommends. my old motor was only turning 4800 wop w/21 3 blade and needed a valve job, 2-3 cylinders low compression.

Bravo 1 drive

If the drive height was set by Pantera at 17" you will probably like the 3 blade props best for top end, Mirage or Mirage plus in 23. The Mirage plus will spin more like a 24 pitch, about 200 rpm's less than a standard Mirage.

Agree with Ironman above, my hull didnt like the 4 blades(except the Trophy plus), Did you call again yesterday Adam, sorry if ya did, I had another missed call from a 954 #, I turn my phone off when in meetings, so just leave a message. I have a standard mirage 23 that you can try, and also have that 4 blade in a similar pitch, like I said, it has been reworked, and not stamped, so knows the real pitch?? The only thing I have in a Mirage plus is my 21.

Rick

Mine likes the 3-blade Mirage. A 23" will probably be the ticket depending on the recommended rpm range. I've got slightly more HP than you will have and turn my 23" between 5600-5800, solid 75 mph...

Jeff... isn't yours a Mirage+? At least it used to be.