my 71 LS5 vette has heads with the following numbers, I realize they are wrong, they have been fitted with 2.19/1.88 valves. my question is are they open chamber or closed and what is the volume of the cylinders and what did they come of of ? the drivers side is B3-72, GM10T6272292 Passenger side is J1171, GM12T6272292
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Re: 71 LS5 head numbers
Heads were used in pass car applications in 72-75 era. 110cc open chamber -
Re: 71 LS5 head numbers
Heads were used in pass car applications in 72-75 era. 110cc open chamberComment
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Re: 71 LS5 head numbers
Open chamber head have 119CC's. The General, for one year only made a semi-open chamber w/110-112CC'sComment
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Re: 71 LS5 head numbers
Open chamber head have 119CC's. The General, for one year only made a semi-open chamber w/110-112CC'sComment
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Re: 71 LS5 head numbers
"GDaina"----
That's not the case at all. There are many "open chamber" heads that have combustion chambers smaller than 119 cc. After about 1972, virtually all production big block cylinder heads were of "open chamber" design. Many of these heads, primarily oval port versions, had combustion chambers of the 112-113 cc size.In Appreciation of John HinckleyComment
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Re: 71 LS5 head numbers
"GDaina"----
That's not the case at all. There are many "open chamber" heads that have combustion chambers smaller than 119 cc. After about 1972, virtually all production big block cylinder heads were of "open chamber" design. Many of these heads, primarily oval port versions, had combustion chambers of the 112-113 cc size.In Appreciation of John HinckleyComment
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Joe, u're right again, what can I say........
The heads you're refering to were used in 74-75 on the low H.P. models and had 2.06/1.72 valves. The 820 heads were used in 71, and also had the smaller valves.Comment
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Joe, u're right again, what can I say........
The heads you're refering to were used in 74-75 on the low H.P. models and had 2.06/1.72 valves. The 820 heads were used in 71, and also had the smaller valves.Comment
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