your thoughts on these heads!
03-05-2011 | 04:10 PM
#21
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Joined: Oct 2005
Posts: 1,899
Likes: 20
From: Millstadt, IL
I can't get a straight answer on compression ratio of the 330. I hear everything from 8.1 - 1, to 8.8 - 1. That said, they generally use a 118 cc combustion chamber in peanut port heads on the motor. The 781s generally have 113 cc combustion chambers:
http://outintheshop.com/faq/casting/castings2.html
That list was taken from Mortech, who for some reason took down the casting number search from their website. They were an online "go-to" authority on GM casting # research.
http://outintheshop.com/faq/casting/castings2.html
That list was taken from Mortech, who for some reason took down the casting number search from their website. They were an online "go-to" authority on GM casting # research.
03-05-2011 | 07:23 PM
#22
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Joined: Jun 2004
Posts: 476
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From: Wichita, KS
Thank you all so much for your help, I would be lost with out you.
I will strip the engine down and fit these heads after a little freshen up as it will make it easier in the future to upgrade. Trying to find decent exhaust manifolds in the UK is a joke but I will keep looking. Once I have those then it's time for a new cam, oh.....and a bravo one!!!!!!
I will strip the engine down and fit these heads after a little freshen up as it will make it easier in the future to upgrade. Trying to find decent exhaust manifolds in the UK is a joke but I will keep looking. Once I have those then it's time for a new cam, oh.....and a bravo one!!!!!!
If I would have had a little more cash in my pocket, I would have upgraded the pistons to forged, ported those heads, put on a Performer RPM Air-Gap intake and a bigger cam. That, I think, would have made a substantial difference.
03-05-2011 | 08:37 PM
#23
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Joined: Jul 2005
Posts: 482
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From: evansville In
