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12-22-2012 #1
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- Jul 2010
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- Mooresville,NC
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Piston/Valve Clearance....Compression Ratio
Hey guys....i'm trying to figure out my compression ratio and piston to valve clearance....thinking i should be good but wanted another opinion.......
....i'm switching to Retro-fit roller and was wondering with my factory dish pistions would be any problems with piston to valve clearance on Comp Cam XR276HR at .502/.510 lift...upgrading from comp cam magnum .470/.470....... here specs:
357(.040 over)(Stock Deck Height)
Stock Dish Pistons
Felpro 1094's gaskets(.015 thick)
Vortec Heads 64cc...1971 Chevrolet Camaro RS-Detroit Speed Equipped
1966 Chevrolet C-10-Driver/Project truck
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01-12-2013 #2
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- Aug 2006
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- 81
I just put dart heads on my sbc. My blocks deck was zero. I have a similar sized cam with trw flat top pistons with 6 cc valve reliefs. I had double the required piston tio valve clearance. But the only way to know for sure is to check. I used the play dough method.
01-12-2013 #3
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- May 2010
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- Mooresville, NC
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- 378
X2 on this! PTV interference is more a function of the duration than lift.
Originally Posted by FMG CAMARO
Marc Battiste
1969 Camaro
LY6/T56/12 Bolt
01-12-2013 #4
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- Dec 2009
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- El Dorado Hills
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- 1,645
I had a small block that was zero decked, flat tops, 64cc chambered heads with comp 280 250 duration 510 lift and there was room to grow. You will be fine.
Gaetano Cosentino
Dont Drive Faster Than Your Angels Can Fly
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