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Aluminum cylinder heads

Posted By famdoc3 2 Years Ago
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famdoc3
Posted 2 Years Ago
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Are they currently available? Getting ready for a new build 1959 block, forged nitrided crank, y block blower manifold, 471 gmc blower in my 1930 Model A coupe. Should be fun!

Mike, still lovin his 57 t'bird after 47 years
miker
Posted 2 Years Ago
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You’ll have to call John and ask, unless someone here has talked to him recently.

The F code in my 32 is more fun than I can stand, a 4-71 in an A will be really something.

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ
Rono
Posted 2 Years Ago
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I may be wrong, but I was under the impression that the aluminum heads may have higher compression than you want for running a blower set-up on the street. On my blower motor I kept the compression low by using the 471 heads and relieving the block. I'm pretty sure my static compression is around 8.0. 

http://www.y-blocksforever.com/forums/Uploads/Images/820681b8-9d4c-46c2-9484-28c5.jpg

Ron Lane

Meridian, ID


charliemccraney
Posted 2 Years Ago
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You can run dished pistons.

When John first started producing the heads, I asked if there would be enough material in the combustion chamber to open them up for boosted applications.  I don't remember the answer and a lot could have changed with the casting between then and now.  Best to talk to him about it.


Lawrenceville, GA
famdoc3
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Thanks guys I will talk to Mr. Mummert when I can.

Mike, still lovin his 57 t'bird after 47 years


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