Just put a b&m 250 on my hp 500. Hoping for 600 to 650 hp. Getting dynoed soon. Does anybody have this setup. I am looking for somewhere to start when I start testing props.

Bravo 1 26 p.. then a bravo 1 Labbed 28. The hydro may cavatate so I would try the Bravo's . That's what worked for me. Call Bblades and rent a stock 26P bravo 1. Then you will know . It's like 25 bucks per week to rent

Assume you have 1.5 gear ratio, start with a 28 bravo1 and maybe a 28 Hydro QIV. It will have some killer top end with the Hydro. Drive smart.

Yeah I am running a 26 p rite now. Gonna try my buddies 28 hydromotive then go from there. Will probably try some from bblades

had a 250 b&m on my hp 500 in my 28 velocity twin 980 nickerson carbs and 9 lbs boost and innercooler added 200 hp ran a 29 hydro at 6000 rpm and put a 31 hydro turned 5800 rpm you be able to turn a 28 hydro or even a 29 hydro

Yeah Griswald has a point. I had a strait bottom ( that wasn't so strait) w about the same motor. I ran 77 @ 5400 w the 28. What kind of RPM are you running now? I would say just add 3-400 to that for starters. So start w the 28 and you will end up 30 p Labbed at about 82 I would think. O and If you want a ****ing air bubble that just wont go away around your prop. Run Hydro's

I have a 1997 27 fever with a 500HP, running a bravo LH 28 running mid 70's at 5000 rpm. Planes out decent w/o using tabs. Had a 26 ran @ 5200 but same speed.