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Upgrades to 502 MPI's

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Old 11-02-2006, 08:54 PM
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Default Upgrades to 502 MPI's

looking to see what is out there that can be done without degrading reliability..... thanks!
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Old 11-02-2006, 09:06 PM
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Default Re: Upgrades to 502 MPI's

What are you looking to do? How much do you want to spend? There is a lot that you can do with the pieces in that motor, as they are GM's best stuff, The main restriction on the motor is the stock intake if you choose to leave the motor with its stock efi, unless you put a blower on it. New head gaskets, one whipple and mild boost, and you have just gainned 200+ HorsePower.
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Old 11-02-2006, 09:13 PM
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Default Re: Upgrades to 502 MPI's

Here ya go, one of the best.

http://www.crockettmarineengines.com/products.html

Just wait till he finishes up jousting with the Duke boyz in Destin before you send the motors over
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Old 11-03-2006, 05:15 AM
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Default Re: Upgrades to 502 MPI's

What hp increase will the crockett upgrade yield on a 502 MPI?
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Old 11-03-2006, 07:57 AM
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Default Re: Upgrades to 502 MPI's

He told me about 100 hp. Basically brings them to between 500 and 525. which frankly is about all you can ask of a stock Bravo anyhow.
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Old 11-03-2006, 09:44 AM
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Default Re: Upgrades to 502 MPI's

Originally Posted by insptech
He told me about 100 hp. Basically brings them to between 500 and 525. which frankly is about all you can ask of a stock Bravo anyhow.
And the cost of this HP gain is ?
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Old 11-03-2006, 11:05 AM
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Default Re: Upgrades to 502 MPI's

Originally Posted by satisfactionII
And the cost of this HP gain is ?
Site says $6850 plus R&R motor, so in the $7500 range.
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Old 11-03-2006, 07:28 PM
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Default Re: Upgrades to 502 MPI's

I'm having Derebery Performance Marine rebuild my 502's. Around 500 reliable horsepower. Stock Bravo 1's. Prices are a little above those above.

Bore 0.030" over
Replace ECU
Port and polish the heads, oversize inconel exhaust valves and SS intake valves
New cam
New crane hardware on the head, rockers, springs etc
Aeromotive fuel pump and pressure regulator

First class people and operation. Call Matt: 903-786-3797

Mike
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Old 11-03-2006, 09:04 PM
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Default Re: Upgrades to 502 MPI's

Originally Posted by Lickitysplit
I'm having Derebery Performance Marine rebuild my 502's. Around 500 reliable horsepower. Stock Bravo 1's. Prices are a little above those above.

Bore 0.030" over
Replace ECU
Port and polish the heads, oversize inconel exhaust valves and SS intake valves
New cam
New crane hardware on the head, rockers, springs etc
Aeromotive fuel pump and pressure regulator

First class people and operation. Call Matt: 903-786-3797

Mike
What are the cam specs? What exhaust system do you use?
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Old 11-04-2006, 12:24 PM
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Default Re: Upgrades to 502 MPI's

Smarty, I have no idea yet. We've discussed using the same cam spec'd in the HP 500. I'm headed back up to Texoma next weekend to check on progress. I'll get the details.

I installed Stainless Marine exhaust a couple of years ago. We're going back with that set up.

Mike
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