500 efi aluminum heads

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02-11-2008, 08:06 AM

Magic Medicine

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500 efi aluminum heads

Looking for opinions on aluminum or another replacement head for a Merc 500 efi. Not trying to break the bank or have to do any mapping. Just looking to bolt on and go. Is this possible? Are there any gains to be had? Options or opinions?

Thanks

02-11-2008, 08:18 AM

jryan26

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I think the 525 heads are edlebrocks. They are reasonably priced.

02-11-2008, 10:43 AM

Airpacker

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I replaced my cracked gm heads with the Edlebrock heads. Need new head bolts but thats about it.

02-11-2008, 10:50 AM

Magic Medicine

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Quote:

Originally Posted by Airpacker

I replaced my cracked gm heads with the Edlebrock heads. Need new head bolts but thats about it.

Did you gain anything? Which ones?

02-11-2008, 12:14 PM

Griff

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If you want any gains, you have to remap the ECM.

02-11-2008, 01:00 PM

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What about the Dart iron eagle heads

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02-11-2008, 01:49 PM

Magic Medicine

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Quote:

Originally Posted by Pantera28-650HP

The complete kit from Ateco includes:

ATECO/DART Pro 1 heads with REV Severe Duty Stainless Intake Valves, REV Inconel Exhaust Valves, FEL-PRO Head, Intake, Timing Cover and Exhaust Gaskets, MANLEY Pushrods, ISKY Roller Hydraulic Cam, Lifters, Springs, Retainers and Locks, ARP Head Bolt Set, True Roller Timing Set and complete Computer Reprograming.

Have several running aound our area with 620+ HP.

How much?

02-11-2008, 02:09 PM

cullen_11

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Be interested in the ballpark cost as well as knowing if the original Merc head covers will still fit?? Trying to look as stock as possible.

02-11-2008, 04:48 PM

CPPerformance

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Quote:

Originally Posted by jryan26

I think the 525 heads are edlebrocks. They are reasonably priced.

If your talking about the new Mercury 525 heads they are built by Edelbrock. But cannot be interchanged as he exhaust bolt flange and the cooling paths are completely different.