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Twin aluminum Small Blocks good idea, or a bad idea?

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Old 08-10-2015, 11:14 AM
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Default Twin aluminum Small Blocks good idea, or a bad idea?

Guys, look for some feed back..

Was thinking about building a pair of small blocks for a 2004 32ft fountain . It currently has 300 hp mpi small block set up.
Was thinking to start with a Dart Aluminum block and Pro1 aluminum heads to chop some weight
It would be 400 CID.. full roller motor with forged bottom end. looking for 450 - 470 hp

Any one have any comments on Aluminum small blocks for Marine applications?
Was thinking to go closed cooling? is this a must for an aluminum block?

Boating in freshwater only for this boat.

Regards,

Unreal Offshore.
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Old 08-10-2015, 11:28 AM
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I think you are in uncharted territory!
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Old 08-10-2015, 11:47 AM
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I have always thought the new AL LS motors would be killer in a 32.

Get weight off the back.
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Old 08-10-2015, 11:51 AM
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Aluminum SBC blocks are not cheap. Would probably be same money to use current LS architecture with a bunch more power.
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Old 08-10-2015, 11:53 AM
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Yep, I'd do with LSX power.
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Old 08-10-2015, 12:02 PM
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The reason why i am trying to keep the weight off. is 1) yes speed !!!!!! but my other consideration is towing it when on the trailer.
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Old 08-10-2015, 12:04 PM
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How much power can you put into a small block and keep it reliable?
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Old 08-10-2015, 12:12 PM
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My buddy put two LS3's in a 30' Profile V bottom. They are all aluminum. Boat runs 95mph all day every day. Pump gas re-jetted hp 500 carbs. He used closed cooling systems off 454's.
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Old 08-10-2015, 07:44 PM
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Nice.. That LS3 is an amazing engine..
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Old 08-10-2015, 07:52 PM
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thiers a guy on here that tyler crocket did some nascar small blocks in a boat for him and it kicked ass
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