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- - Aluminum heads (https://67-72chevytrucks.com/vboard/showthread.php?t=306046)

5150.4.67

09-09-2008 12:20 AM

Aluminum heads

Anyone using aluminum heads? What c/r can you get out of them on 87 octane? I have a shot at some zz4 heads and was wondering if I should jump on them.
Jay

lowriden58

09-09-2008 08:46 AM

Re: Aluminum heads

im using AFR 195 64cc heads on my 355. she is ~10.5:1 comp, and i only run 93 in her. :smoke:

steelhorse

09-09-2008 09:01 AM

Re: Aluminum heads

With aluminum heads anything below 10 to 1 and your good, above that the right cam and tune become more important.If you can get a good deal on them go for it,they will out perform any old head.

Irishpilot

09-09-2008 04:44 PM

Re: Aluminum heads

I'm running the Edelbrock E-Tec aluminum Vortec heads with 10.6:1 on 91 octane. With the right port, these heads will run 9.5:1 on 87 no problem. From what I know about aluminum is you can go almost one point higher than iron heads on the same octane.

5150.4.67

09-10-2008 11:47 PM

Re: Aluminum heads

Thanks, all. Think i'm going to go for it.
Jay

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