What prop size?
#1
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What prop size?
I have 3b 23P props on my 342 baja. It is powered with twin 7.4 L MPI and Bravo Ones.
I am repowering with new 496 Mag HOs and Bravo one Xs. I am thinking moving to 28P props. Would that be about right?
I am repowering with new 496 Mag HOs and Bravo one Xs. I am thinking moving to 28P props. Would that be about right?
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Depends on a lot of factors. What RPMs where you turning the 7.4. How many RPMS do you plan on spinning the 496.
What was the increase in HP. It will take alot of increase to jump from 23 to 28
What was the increase in HP. It will take alot of increase to jump from 23 to 28
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Rpm
The 7.4L MPIs were turning about 4300 WOT and producing only about 305 HP.
The 496 mag HO produces 425 at the prop. WOT is close to 5000 RPM. Big difference in engines
The 496 mag HO produces 425 at the prop. WOT is close to 5000 RPM. Big difference in engines
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#8
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Pre 01' boats usually have the drives mounted deeper,
where the 3 blades usually work best.
Last edited by JaayTeee; 03-04-2007 at 08:59 AM.
#10
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Try the 23's first to see where you're at. You've got a 700 rpm window to make up as it is. If you're banging the limiter than it's time to move up. (You need to remember 1" up in pitch is at least 100 rpms less.)