Has anyone tested edelbrocks claim that the zz502 shortblock with their head, manifold,cam combo p/n2094 yields 611hp@5800 and 572 ft/lbs of torque.I'm thinking about buying this combination instead of rebuilding 454 and would like to know if anyone has tested it in a boat. The edelbrock setup comes with their 2262 roller cam int 236/625 exh 245/639 with a 109 lobe sep, 300cc runners 2.25 intakes, and victor jr manifold.Sounds good for a bracket racer but how does it perform in the water and what about reversion,if anyone has tried this combo or has any knowledge or opinions I would greatly appreciate the thread... It would be installed in a 253 convincer with a 26 bravo 4 blade.

The 109* lsa will probably give you problems with reversion.

The 502 shortblock is a great foundation.

For heads and valvetrain I would contact Bob Maderia aka RMbuilder.. 585-654-8583.

Lots of guys here on OSO have gone to him with excellent results.

Chris

I agree that the cam will not work, unless you are running full dry exhaust.

I would not spend the $ on the kit, those #'s would not be that hard to acheive and work in a boat....I agree call Bob M.
Rob

The zz502 comes with aluminum heads made by Edlebrock?
I am sure that camshaft would up the horsepower on a zz502 close to 600HP alone at that rpm , but as everyone is saying here, that is not a cam grind you would want to run in a boat with a wet exhaust!
Sometimes its good to stop reading all the magazine hype and talk to those who know to avoid disasters!

Best Regards,
Ray @ Raylar

I've got an engine available that might be just what you're looking for. Just refreshed last summer. It's a 502 w/AFR heads, Custom "RMbuilder" cam, KE headers. Made 592 HP on my dyno, in full "wet" marine trim. Give me a shout if interested.

Bob
830 6935591

That cam has a 112 lobe seperation. Will this still create reversion?

http://www.edelbrock.com/automotive_...61_camcard.pdf

I have used those heads and Bob RMbuilder made the cam to match. Good heads for the money, but I would invest in AFR or what ever Bob suggests to make it a complete package. Remember exhaust is the key to any major build!

If you plan to spin a zz502 anywhere near 6 grand, think again. We took a brand new one apart and checked its build and balance quality. It would have beaten itselt to death in no time without being properly balanced.