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small block in a 27 ?!?!

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Old 03-27-2011, 09:35 AM
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Default small block in a 27 ?!?!

What are your thoughts on this ? Mid to high 600's horsepower wise. Its basically a marinized NASCAR engine !
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Old 03-27-2011, 09:52 AM
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Have a 650hp wippled 502 in my 27 and it does great
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Old 03-27-2011, 09:53 AM
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Originally Posted by berns29scarab
What are your thoughts on this ? Mid to high 600's horsepower wise. Its basically a marinized NASCAR engine !
Not as easy as it sounds and equal or more expensive than a big block per horsepower.

Its a question of manners.

If you are talking about an outdrive boat you need a decent idle quality or you'll beat up the clutch and gears just getting out of the marina.

The 600 HP through 3 inch open pipes at 6500 RPM is a different proposition that 600HP through wet marine exhaust.

just as important as the 600 HP is what the torque curve looks like. If it cant be stabilized on a dyno below 3000 RPM its not going to come on plane real easy either.

High 600's - yeah not without a blower or be prepared to drop monumental coin on a small block to do this that works in an outdrive boat.

This can be done- but it will be expensive to do it well and by the time you are done a mild big block would have been cheaper.

This is a path Ive personally taken so I know.


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Last edited by Uncle Dave; 03-27-2011 at 10:08 AM. Reason: spelling
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Old 03-27-2011, 09:55 AM
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Look at the 24 pantera plum loco 700hp smallblock
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Old 03-27-2011, 09:57 AM
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Originally Posted by pokey27
Have a 650hp wippled 502 in my 27 and it does great
Uhh... thats a big block...


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Old 03-27-2011, 09:58 AM
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Uncle Dave you got a gourgeos looking boat and that engine and compartment looks like you can eat off of it.
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Old 03-27-2011, 09:59 AM
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Originally Posted by innerrage
Uncle Dave you got a gourgeos looking boat and that engine and compartment looks like you can eat off of it.
Thanks sir, very nice compliment.

I work hard at keeping my toys in good shape.

UD
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Old 03-27-2011, 12:25 PM
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Bern...staggered small blocks...
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Old 03-27-2011, 12:28 PM
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That being said...as light as our boats are..and easy as they get on plane..i think propped well it would work. But it might be doing it the hard way
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Old 03-27-2011, 12:30 PM
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Has anyone built a big cube small block for marine use? Just kind of curious, back when I was into cars there were some guys building 427-454 cube small blocks with pretty serious tq and hp #'s. I know they were pretty pricey to build, but in a small boat would the weight savings be worth the cost?
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