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Old 12-26-2012, 09:09 AM
Madman Madman is offline
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Default Compression Increase With heads

I been working on my first 460 build, simple one engine runs great but rear seal once again aheader leaks prompted me to repair said problems, Now with the engine running Propane and Gasoline (dual Fuel) I was considering a set of 75 cc edelbrock heads as a replacement, I wonder if these will fit right on the stock 1984 circa. block with stock pistons and what compression increase I would have. I think stock is 7.8 to 1 i=f im correct(usually im Not ha ha) Thanx Guys Mike
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Old 12-26-2012, 12:03 PM
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Quote:
Originally Posted by Madman View Post
I been working on my first 460 build, simple one engine runs great but rear seal once again and header leaks prompted me to repair said problems, Now with the engine running Propane and Gasoline (dual Fuel) I was considering a set of 75 cc edelbrock heads as a replacement, I wonder if these will fit right on the stock 1984 circa. block with stock pistons and what compression increase I would have. I think stock is 7.8 to 1 i=f I'm correct(usually I'm Not ha ha) Thanks Guys! Mike
Did you find the set of Edelbrocks at a good price? That i think, to me at least, would be a determining factor as the cost of the complete heads is fairly high. What are you working on? And what is (are) your performance expectation(s)?
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Old 12-26-2012, 12:48 PM
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If the engine is bone-stock then your compression will increase from about 7.9:1 to about 9.2:1 with this particular head swap. Note that the valve train is different between the two heads and it will be necessary to spend several hundred more for the new valve train parts and associated components.

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Old 12-26-2012, 03:01 PM
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Another consideration is the piston to valve radial clearance with a cam much more than stock.

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