89' 281. 692hp blown 496, 420 blower, 12" box, bravo 1. Anybody have any advice on where to start? I'm thinkin bravo 26 to start? Or should I maybe go 28 or 30 to start?

28 to start if gear ratio is 1.5 would be my guess. Is the motor, box or boat new to you? I purchased a single engine, new box installed boat without a prop because the seller didn't have x-dimension dialed in yet with the box. Hard to know what you have until you throw a prop on and get a baseline. Try not to buy a prop before you know what you need (been there).

All depends on what your top RPM is supposed to be.
I would think with that HP I would try a stock bravo 30.
BBlades has an exchange program that I would try.

Great thanks for the replies! The boat is new to me. It has a 26 on it now, which seemed small to me. I am going to try and get it out next week and see speed and RPM. I will report back.

Turbo props worked well for me when I had my 270 Checkmate. As someone mentioned, check with Brett at BBlades and he'll get you on the right track.

A labbed 28 will turn about the same as a stock 26. I would try a stock 30 and see if you can turn it. If you can get close than have it labbed.

I'd start with a stock 30