az350psd

Hi new to forum, have a 2001 heat with a 454 (sucks) use to a 500hp in a 23ft rinker. Would like to repower to get around 72 to 74 mph. Have bravo drive, think it is just a bravo 1 vin on it is 114156 i think. will i need to upgrade it also. Hour meter says only about 140 hrs on boat. Any help appreciated

Jay Gadsby

A newer 525EFI would get you there with the right prop and gear ratio. Of course, I am a huge fan of rebuilding and making an engine more potent that swapping in a new engine. Either way, around 470-500hp will get you there (or darn close). Good luck, and oh, pics! You must provide those too

Steve Zuckerman

More cubic inches will make for reliable power for the low to mid 70s. I would look for a clean used 502, and build from there. For reference the 502 Mag/415HP motor runs about 65,
the 500EFI runs low to mid 70s, and the 525EFI run mid 70s, with a few well set up Heats running upper 70s in perfect conditions.
If you want to use your existing block, make sure it's a 4 bolt main bearing 454. If it is, you can bore and stroke (4.25"s) to
a 496". The 496/454 stroker should easily make the 525/550 HP you'll need to consistently run in the mid 70s, naturally aspirated.
The 496/454 stroker makes a great supercharged motor too.
That's what my friend Butch is running in his '96 Heat.
Regards,
Steve

az350psd

thanks for inputs drive vin is 0L749376 what drive is this ,thanks

Steve Zuckerman

Based on your engine and year model Heat, it's probably a standard Bravo1. Probably 1.5 to 1 gear ratio.
Maybe one of our dealer friends on here can run the #s for you.
Steve