How fast should I be? Am I missing something .
 

So I have a 31 awesome cat. Has gen 6 454’s procharged. The blocks are basically stock with stainless marine exhaust and 5 pounds of boost at WOT. Bravo out drives 1.35 ratio with 30 pitch props. I’ve trimmed anyway imaginable. I can only get the boat to run 4800 Rpms at 80 mph and that’s all with a half tank and one extra person l. It’s starts to pack air and I’ll I want is the extra speed to drive through it. 1. Should I be faster than 80 2. Should I lower my pitch or 3. Am I just flat out missing something. Any helps is appreciated.

how much power do the engines make ?....

That has to be the starting point to the conversation...

454 truck block came as a 230 hp - convert to marine + 5 lbs of boots would only give roughly 308hp
385hp 454 mag with 5lb of boost would potentially produce just over 500hp - a LOT of mph difference in the HP spread potential.

***Short answer/quick/definite answer is throw on a set of 28's and see where that run get you

Definitely lower the pitch until you get to 5200.

Your hp should be in low 500's with that combo, I agree, drop down in pitch and maybe try some different makes of props. I don't think you will see more than mid 80's with that power though.

Sounds like you just repowered. What was the setup before and speed?

What props are you running?

Thank you all for the responses. The set up has always been the same as for as I know and the motors are 454’ mags. I’ve usually do all my motors and maintenance but drive ratios and prop pitches are a little out of my league so far. Reason I’m on here asking the experts. Lowering the props was going yo be my first start but I really wanted options instead of guessing.

try a set of B1 28p 4 blade, I ran them on a 38 TG with similar power to yours 500 EFI's and spun them 5150

I don't know anything about the model boat you have, but when I had blown 509's I was running a 1.5 ratio bravo 32p bravo's. I would think the 1.35 ratio bravo's with the 30p props is a lot of gear for 500Hp 454's. I am not an expert just my opinion. Like others have said try some lower pitch props and I bet you see better performance.