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Give me the poop on the 420hp merc.

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Old 05-12-2005, 08:50 AM
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Default Re: Give me the poop on the 420hp merc.

What was the compression ratio on the 420hp motors?
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Old 05-12-2005, 09:01 AM
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Default Re: Give me the poop on the 420hp merc.

mtgbiker

Contact "rmbuilder" on this website for an accurate cam for your combination. He has a vast amount of experience, knowledge, and the integrity to get you what you need for a marine application cam grind.
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Old 05-12-2005, 09:39 AM
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Default Re: Give me the poop on the 420hp merc.

Originally Posted by KAAMA
mtgbiker

Contact "rmbuilder" on this website for an accurate cam for your combination. He has a vast amount of experience, knowledge, and the integrity to get you what you need for a marine application cam grind.
Will do Kaama.....
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Old 05-12-2005, 10:11 AM
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Default Re: Give me the poop on the 420hp merc.

Originally Posted by KAAMA
mtgbiker

Contact "rmbuilder" on this website for an accurate cam for your combination. He has a vast amount of experience, knowledge, and the integrity to get you what you need for a marine application cam grind.
Will do Kaama.....
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Old 05-12-2005, 01:45 PM
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Default Re: Give me the poop on the 420hp merc.

Originally Posted by articfriends
Josh,this is a 2 1/2 year old thread that someone dragged up!!!
Opps.I was wondering why he wanted another set of engines. But thats what I would of said two years ago 420's rule
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Old 05-12-2005, 09:40 PM
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Default Re: Give me the poop on the 420hp merc.

Originally Posted by mtgbiker
What was the compression ratio on the 420hp motors?
9:1 flat top . all it was is a lS6 engine 7/16 rods and steel crank.
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Old 05-16-2005, 12:24 PM
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Default Re: Give me the poop on the 420hp merc.

Does anybody know what model Holley Carb came with the 420 HP? I'm looking for a spare.
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