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alluminum vs. cast iron heads

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Old 01-11-2006, 09:04 PM
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Default Re: alluminum vs. cast iron heads

Thanks for the advice dave, do you see any hp increase with alum vs. cast if both are ported? Also do you see any merit in what blast said about 671 creating to much heat
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Old 01-11-2006, 09:05 PM
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Default Re: alluminum vs. cast iron heads

Quote:
Originally Posted by blastersbro
671 bds on a 540 is working too hard,creating extra intake heat.no one uses 7.5 compression because it will have no balls in no boost conditions.what else you got?

I will look into the 671 issue, thanks for the advice
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Old 01-11-2006, 09:11 PM
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Default Re: alluminum vs. cast iron heads

Years ago I put a pair of Trick-Flow Twisted Wedge aluminum heads on a 406 SBC with a solid roller cam and headers. The difference was unbelievable! I have that engine in a stock-looking 1968 Firebird coupe. It has a tricked-out 400 THM with a 2500 stall converter.

Yes, I'm a gear head refusing to grow-up!
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Old 01-11-2006, 09:12 PM
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Default Re: alluminum vs. cast iron heads

Quote:
Originally Posted by berman58
I will look into the 671 issue, thanks for the advice


DC aka "Blastbro" is harmless..........he has to much knowledge but dosn't know how to deliver it...he is from Jersey what else would you expect?
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Old 01-11-2006, 09:22 PM
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Default Re: alluminum vs. cast iron heads

I think these are the guy's that think you can buy a new boat @40% off retail.......retarded
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Old 01-11-2006, 09:28 PM
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Default Re: alluminum vs. cast iron heads

What's up mark
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Old 01-11-2006, 09:31 PM
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Default Re: alluminum vs. cast iron heads

just back from setting up Cleveland show..........wanted to see how this session was going........another b**ch session I see........seems like most everyone has great info J, only those wannabee's spoutin off........
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Old 01-11-2006, 09:34 PM
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Default Re: alluminum vs. cast iron heads

Do you think in my setup 671's should be looked at. I know they're not the latest and greatest (1071???) but that's not what I'm going for. I don't think 671's are the weak link or could they be.
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Old 01-11-2006, 09:40 PM
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Default Re: alluminum vs. cast iron heads

berman,most everyone has given great info. Your combination is fine,let CM figure where the failure was,what caused it,decide on what to do and get it done!It's not really that critical.........great parts,expert assembly,common sense..........it stays together.
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Old 01-11-2006, 10:15 PM
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Default Re: alluminum vs. cast iron heads

berman,
You could contact site member rmbuilder/Marine Kinetics. Great source for info, advice, and good prices on AFR's. He's big into R&D and a very knowledgeable guy.

Funny, I've read a few of blaster's posts....he is just a bit rough around the edges LOL
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