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  #1  
Old Jun 1st, 11, 4:39 PM
heavychevy86 heavychevy86 is offline
Matt
 
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Default iron GM head recommendation 454

I'm running a 454, .030 over, SRP 41cc dome pistons, stock length rods and crank. I will be running a Edelbrock RPM air gap or a Brodix HV2016 intake. I have a few choices for heads: 781/049 large oval, 188 rect, or the 934 rect (502 iron heads). I am looking for maximum torque between 5500-6500 and hp up to 7200-7500 rpm. The engine should be at 6800-7200 most of the time. The cam selection is wide open as well. I'm most interested in the 934 casting heads with a solid roller. I know the dual plane intake sounds crazy, but thats what I am running. That said, what do you guys think?
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  #2  
Old Jun 1st, 11, 6:32 PM
70-SS454 70-SS454 is offline
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Frank Riley
 
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Default Re: iron GM head recommendation 454

781/049 are supposed to be the best flowing BBC iron heads...
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  #3  
Old Jun 1st, 11, 9:49 PM
heavychevy86 heavychevy86 is offline
Matt
 
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Default Re: iron GM head recommendation 454

If I'm not mistaken, 781/049 are most efficient, but no necessarilly best flowing.
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Old Jun 2nd, 11, 5:52 AM
71454Chevelle 71454Chevelle is offline
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Darren
 
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Default Re: iron GM head recommendation 454

Quote:
Originally Posted by 71-454 View Post
781/049 are supposed to be the best flowing BBC iron heads...
Quote:
Originally Posted by heavychevy86 View Post
If I'm not mistaken, 781/049 are most efficient, but no necessarilly best flowing.

In stock "unported" condition, 049/781 are probably the best flowing oem iron "oval" port heads.
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Old Jun 2nd, 11, 2:55 PM
Twins Fan Twins Fan is offline
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Brad
 
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Default Re: iron GM head recommendation 454

Is there a reason you're going with GM iron heads, and not aftermarket, or even aluminum GM? I ask because you say you're going with a solid roller, so I assume there's a decent buget to mess with.

In the upper RPM range you say you will be operating in, I would say the rectangle port heads would be a better choice for you.
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