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#1
05-30-2008, 07:16 PM
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Question on displacement
Can someone answer this question.. I have a 77 400 bored .030 over with stock rods and crank. What would the displacement be roughly?? Might be a stoopid question but hey...
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1967 Pontiac Tempest 2dr HRDTP Coupe 468 C.I. 500 HP 5 speed = FUN!!! 1990 Chevy Suburban R2500 Daily Driver 1986 Volvo DL245 Wagon.. Project car!!! The Burb Files |
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#2
05-30-2008, 07:26 PM
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Just a tick under 406 cid,most round up to call it a 406.
HTH. |
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#3
05-30-2008, 07:27 PM
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Thanks
Thanks. Now I have to find a 406 bdge for the front fender!!!
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1967 Pontiac Tempest 2dr HRDTP Coupe 468 C.I. 500 HP 5 speed = FUN!!! 1990 Chevy Suburban R2500 Daily Driver 1986 Volvo DL245 Wagon.. Project car!!! The Burb Files |
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#4
05-30-2008, 07:50 PM
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Back in the early 60s, Ford had 406 badges.
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Bill 64 GTO, tube chassis w/606" IA tall deck, PG & a pro geared Fab 9". 2750 lbs. 8.2550@164.17-1/4, 5.2901@131.97-1/8, 1.1981-60-ft. 8/10/08 
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#5
06-01-2008, 04:13 PM
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Displacement = Bore x Bore x Stroke x .7854 x 8 (for a 8-cylinder)
A stock Pontiac 400 has a 4.12" bore and a 3.75 stroke, so: 4.12 x 4.12 x 3.75 x .7854 x 8 = 399.951 rounds to 400ci. Once you over bore .030" you get: 4.15 x 4.15 x 3.75 x .7854 x 8 = 405.797 rounds to 406ci. I think thats the same as what Screaming chief said. |
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