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Just went to get a warrent guy said I have double
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Double bump heads on my 350chev. I looked up the numbers when i got the motor and the heads came back as 327 which seemed strange at the time.
Ive since learned that people sometimes do this to get higher compression. Now this guy today called them double bump heads lol.
Whats this double bump actually mean. Googled it but people selling them or people with them in there cars but no real info.
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If its not broke it will be soon |
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double hump fuellie heads.
If nissan motorsport is nismo, then doesn't that make honda motorsport Homo?
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double hump fuellie heads.
If nissan motorsport is nismo, then doesnt that make honda motorsport Homo?
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Simply a casting mark.
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my pontiac has single hump 327 heads.
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Hey Cloudy,
I didn't know you had a Pontiac ... email me
Gary T |
Gary T
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Hey Cloudy,
I didnt know you had a Pontiac ... email me
Gary T |
Gary T
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they are 1964 -1971 z28 302 327 350 heads 202/160 valves factory lt-1 heads depending on year p/t number is 3987376 are late heads., 3853608,3958604,3928445 where early'er heads used on fuel injected comaro and corvettes
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they are 1964 -1971 z28 302 327 350 heads 202/160 valves factory lt-1 heads depending on year p/t number is 3987376 are late heads., 3853608,3958604,3928445 where earlyer heads used on fuel injected comaro and corvettes
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they are 1964 -1971 z28 302 327 350 heads 202/160 valves factory lt-1 heads depending on year p/t number is 3987376 are late heads., 3853608,3958604,3928445 where earlyer heads used on fuel injected comaro and corvettes D77 I have no reference to Edited by user Monday, 28 January 2008 6:48:33 AM(UTC)
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they are 1964 -1971 z28 302 327 350 heads 202/160 valves factory lt-1 heads depending on year p/t number is 3987376 are late heads., 3853608,3958604,3928445 where early'er heads used on fuel injected comaro and corvettes D77 I have no reference to Edited by user Monday, 28 January 2008 6:48:33 AM(UTC)
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gday mate info is from a book named how to hot rod small block chevys by bill fisher & bob waar a must read for hotting up older motors has all the performance parts list and tec info you need for 60/70 sbc but its an old book and hard to find
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I think those are part numbers not casting numbers.
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If we all had the same (good) taste, who would buy all the Fords? |
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Nice ill take the rocker cover off and see if I can find a part number
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If its not broke it will be soon |
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not all double hump heads had the 2.02 inlet and 1.6 exhausts
i have a pair of "small valve" double heads, about 1.9 and 1.5
yes sonny, its an HQ ute |
yes sonny, it's an HQ ute |
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not all double hump heads had the 2.02 inlet and 1.6 exhausts
i have a pair of "small valve" double heads, about 1.9 and 1.5
yes sonny, it's an HQ ute |
yes sonny, it's an HQ ute |
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the casting numbers on the double hump fuelie heads should be 3991492 factory pt/number is 3983736 these are factory lt-1 preformance heads used on 64-69 302,327,350 corvettes and comaros with 2.20 intake and 1.60 exhaust 65cc chambers straight plug . the
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Just went to get a warrent guy said I have double
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