500 Efi To 625 Plus Hp
#2
21 and 42 footers
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Don't bother...I did it, won't do it again. We didn't use anyone's "kit" but built our own (a couple buddies were the knowledge behind all the checks I wrote).
Made 540's out of the bottom end, ported Iron Eagle heads, BIG cam, 9.7 compression, monoblade ASM throttle body. The intake will hold you back. Dyno runs from seawater pump to my wet CMI's made 630HP and 700/ TQ. HP would have been higher (maybe 30-40) if we had went to carbs since the motor can't get enough air through the plenum. I was told all this but insisted on going EFI....It runs good but cost a fortune by the time we were done.
Made 540's out of the bottom end, ported Iron Eagle heads, BIG cam, 9.7 compression, monoblade ASM throttle body. The intake will hold you back. Dyno runs from seawater pump to my wet CMI's made 630HP and 700/ TQ. HP would have been higher (maybe 30-40) if we had went to carbs since the motor can't get enough air through the plenum. I was told all this but insisted on going EFI....It runs good but cost a fortune by the time we were done.
#3
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Don't bother...I did it, won't do it again. We didn't use anyone's "kit" but built our own (a couple buddies were the knowledge behind all the checks I wrote).
Made 540's out of the bottom end, ported Iron Eagle heads, BIG cam, 9.7 compression, monoblade ASM throttle body. The intake will hold you back. Dyno runs from seawater pump to my wet CMI's made 630HP and 700/ TQ. HP would have been higher (maybe 30-40) if we had went to carbs since the motor can't get enough air through the plenum. I was told all this but insisted on going EFI....It runs good but cost a fortune by the time we were done.
Made 540's out of the bottom end, ported Iron Eagle heads, BIG cam, 9.7 compression, monoblade ASM throttle body. The intake will hold you back. Dyno runs from seawater pump to my wet CMI's made 630HP and 700/ TQ. HP would have been higher (maybe 30-40) if we had went to carbs since the motor can't get enough air through the plenum. I was told all this but insisted on going EFI....It runs good but cost a fortune by the time we were done.
#4
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i know they changed the cam and heads, bumped the compression up and mapped the computer. left the motor a 502. ijust read on other thread Tyler Crocket was working on a new intake.
Last edited by chad1; 01-06-2008 at 06:28 PM.
#5
Michigan Mad Man
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I have a new plenum top that will fit right on your intake manifold with a 2000 cfm throttle body built flush right in the top so the air will go right down the runners with on restriction. I plan on having one at the Miami Boat Show in Feb.
#6
21 and 42 footers
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The main problem with mine is that we cannot use everything in the bottom end since we're not getting enough air. A buddy built 540's the same time I did and he had carb'ed 500's. Putting a bigger carb and air breather on his intake solved that air flow problem for him.....so yes, I'd do it again with a carb'ed 500.
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do you offer a kit to get to 625 plus hp? how much? best time and way to contact you?
#10
Michigan Mad Man
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