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#1
03-05-2003, 09:07 AM
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Hi ! I am looking for some pictures and help on unshrouding and re-shaping the combustion chambers on my # 670 heads. The heads go on my 66 421 short block .060 with 428 .030 pistons with 4 reliefs. What can be done to the air passage holes next to the exhaust valve guide in the port ? What is the best material to fill the exhaust crossover in the heads and is it necessary to do it for street use. I had a thin piece of stainless steel blocking it off before at the head and intake gasket.
Thanks for any help. Larry |
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#2
03-05-2003, 09:07 AM
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Hi ! I am looking for some pictures and help on unshrouding and re-shaping the combustion chambers on my # 670 heads. The heads go on my 66 421 short block .060 with 428 .030 pistons with 4 reliefs. What can be done to the air passage holes next to the exhaust valve guide in the port ? What is the best material to fill the exhaust crossover in the heads and is it necessary to do it for street use. I had a thin piece of stainless steel blocking it off before at the head and intake gasket.
Thanks for any help. Larry |
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#3
03-05-2003, 11:24 AM
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Larry page through the link. i have shots of the chambers on my #16 D's.
1973 SD455 T/A 1979 S.E. T/A http://community.webshots.com/album/16587603rOyvmFCiHs
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Home of WFO Hyperformance Shaker induction. |
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#4
03-06-2003, 06:24 PM
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There was a 400 buildup a year or so in Hot Rod or Car Craft that Ken Crocie used some 670 s opened up on. The Wilhites (Kansas?)has a Bridgeport cutter for opening them up to late model shaped.
I would think trying to copy a high swirl fast burn chamber would get you in the low 80ccs and about right for a 400 on pump gas.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#5
03-09-2003, 06:08 PM
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Still looking for more info on my post for help with # 670 heads
Thanks Larry |
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