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Old 06-05-2005, 08:16 PM
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Crate MPI 454

I just bought a crate 454 off ebay and am wondering if someone can give me some info. It's still in the crate and appears to have never been started or even had oil put in it. I bought it from a guy, who bought it from his brother, who bought it from a guy, who had to sell it because of a divorce. Needless to say the guy couldn't answer a lot of questions. It's a marine setup. The motor is a four bolt main 454 with a Arizona Speed & Marine multiport (ginormous TPI) intake. It has everything. Harness, computer, injectors, & sensors. The guy said this is how the original guy bought it for his boat. I pulled the intake so I could polish it and was disapointed to find "peanut" heads on it. Of course I was hoping for rectangular aluminum. The intake is for a large oval port head. Is it likely the motor and intake were bought seperately or is this how they are shipped, and if they come assembled, who sells them? Is it Chevy, Arizona Speed and Marine, or Mercruiser?

Thanks,
Kevin

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Old 06-05-2005, 08:27 PM
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KA67 does it have a Mercruiser tag on the side of the bell housing flange? Depending on where he bought it, it could have had the intake changed from the stock unit. Most of the fuel injected marine engines, except the high hp models, got the small oval port heads to aid bottom and midrange torque. Check my thread on the differences between automotive and marine engines if you are planning on running this in an automotive application.
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Old 06-06-2005, 05:52 AM
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I'll check for a tag when I get home. The plan is to put a pair of turbos on it, buy some bigger injectors, have the computer reprogrammed and build my 72 Chevelle around it. I guess I'll be swapping out the heads. I have an extra set of large oval ports but would prefer rectangular. I only have $2500 in motor so far, so I may purchase some aftermarket heads.

Thanks,
Kevin
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Old 06-06-2005, 08:42 AM
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If you plan on running turbos, I would recommend the AFR 305cc heads with the CNC ported combustion chambers. If you had the money, I would go with the fully ported 315cc heads. It sounds like a cool buildup.

Adam
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Old 06-06-2005, 03:33 PM
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There's no tag on the back of the motor. There is a small cut off piece of flat steel with one bolt going into the back of the head. It looks like it was there to hold a hose or something, but could have been a tag. Are some mercruisers shipped with ASM intakes?

Kevin
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Old 06-06-2005, 09:39 PM
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It is my understanding (according to Mercruiser) that all engines from mercruiser have the metal tag on the block held on by rivets. I have heard of these engines offered through some marine retailers fitted with the ASM intake system. Other than that, I can't give you any more info, sorry. I'd be happy to shoot you a price on some heads if you're interested. Let me know.
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Old 06-07-2005, 04:30 PM
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I have to wait for a super deal (almost free) before I buy some heads. I'd love some huge AFR's but they don't come cheap enough. I'm watching some small merlins in need of repair right now. Thanks for the info.

Kevin
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