Any suggestions? I'd like a 4 blade Bravo.

24P would be my guess.

Thats what I'm thinking too. 22P will not be enough.

Take a look at these folks...they have some impressive equipment.

http://www.hydromotive.com/main.html

I was out on June 4th. Old Gas 5000 rpm, 52 mph (gps) 55 on the speedo. with a 22p 4 blade bravo 1 (not labbed). I have the black 502 mpi bravo 1 in a 271 sr-1 1993, so I believe it's a 1.65, now that I understand most formulas with the black 502's had 1.65's I've seen recommendations all over the place for 271 props. Wurl seems to have tried them all. makes me wonder if mine would turn a 28.

Cant be correct prop.
I have a 242SS 454 330 HP Bravo1 1,50
mirage 21 plus. Seen 50 on the gps (with bottom paint)

Your boat should go closer to -60 mph

god luck chaesing correct propeller :-)

i just ran 60.0 on gps with a 23 three blade with carb. 502.. 242 ls.. spins right at 5100 rpms

My 89 223ss with the stock 454 ran 58 on gps with a 23 older style mirage 3 blade if that helps.

My 88 223LS - 502 mag 1991, milled and pocket ported rectangle port heads, 24 degree ign box, no1 rapidfire spark plugs, premium fuel, 24 pitch bravo one reworked, spins to 5000 on gps 68 mph