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  1. apw30534

    Adding 100+hp. Would you re-prop ?

    The 454 was an option in my boat in 1997. Im pretty sure it was 330hp back then. The 415hp hull rating was something I stumbled upon when researching specs on the 97 Chap 2330. Obviously I would have much rather started off with a 454... but since the boat came with a 350... its a much easier...
  2. apw30534

    Adding 100+hp. Would you re-prop ?

    it's aluminum. I'm actually looking into doing a closed cooling system anyway.
  3. apw30534

    Adding 100+hp. Would you re-prop ?

    I will run it with the 26 props first... but expect it may run better with 28's. I dont want to spin the Bravo 3 too fast... but also dont want to give up top speed. The 330hp 454's that Chaparral put in these boats had a 28 pitch prop... so my best guess is it would be a good match for the new...
  4. apw30534

    Adding 100+hp. Would you re-prop ?

    This was a GM "602" CT350/350hp circle track crate engine. I can assure you it was not an 11,000rpm engine. lol It was a flat tappet hydraulic cam and max RPM was 5800. Out of the crate they made 350-365 dyno tested HP. Mine will make at least 365-375 with the upgrades. Trust me. Not my first rodeo.
  5. apw30534

    Adding 100+hp. Would you re-prop ?

    Ive actually built quite a few engines over the last 35+ years. (50+) I know what it takes to make power and have built a few that touched on 1000hp. This exact engine started as a 350hp circle track engine. Im putting a larger hydraulic roller in it and bumping compression from 9.1 to 9.6. Im...
  6. apw30534

    Adding 100+hp. Would you re-prop ?

    1997 Chaparral 2330 with a 250hp 5.7 Mercruiser and Bravo 3 with 3x3 26 pitch props. Boat is 3850lbs dry, hull is rated for 415hp. Current top speed on the boat is 48mph with 2 people + gear. I'm building a spare (355) engine that should be approx 365-375hp. Engine details: +.030" chevy 4 bolt...
  7. apw30534

    Intake port cc question for 5.7l sbc

    FYI... those Vortec heads will outflow a set of Chevy Bowtie heads from years ago. They are excellent heads right out of the box and designed to work best at lifts under .500" and with 1.94/1.5 valves. I'm currently building a mild 355 from a worn out 602 circle track crate engine...(350/350hp)...
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