Piston Question
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Piston Question
All - Hopefully a straight forward question for the experts on here. I recently bought a 532 A-head engine only to discover the block had several cranks through the main cap bolts holes (bummer...). Anyway, I am building an entire new short block for the A-heads and would like to reuse the rotating assembly out of the cracked block in another block utilizing Eddy CJ heads.
Question - Is this as simple as checking piston to valve clearance and having a new relief (or reliefs) cut? The parts are nice and hate to see them go to waste if I can use them. Thanks for your help!!
Question - Is this as simple as checking piston to valve clearance and having a new relief (or reliefs) cut? The parts are nice and hate to see them go to waste if I can use them. Thanks for your help!!
Rich Osmond- Posts : 217
Join date : 2013-02-03
Location : League City, Texas
Re: Piston Question
If the pistons are FLAT tops I cant see why not as long as the correct size reliefs are cut and checked before assembly.
bbf-falcon- Posts : 8995
Join date : 2008-12-03
Location : Jackson, Ohio
Re: Piston Question
Yes, should have mentioned they are flat gas ported Diamond pistons with a single (intake) valve relief. Thanks!
Rich Osmond- Posts : 217
Join date : 2013-02-03
Location : League City, Texas
Re: Piston Question
Nothing too high as I will run it on E85 and street drive it. I may have calculated it wrong but came up with ~ 12.6:1 estimating a second valve relief of ~3cc's, .005" down in the hole and a .040" gasket thickness. Lower would actually be better.
Rich Osmond- Posts : 217
Join date : 2013-02-03
Location : League City, Texas
Re: Piston Question
Rich Osmond wrote:Nothing too high as I will run it on E85 and street drive it. I may have calculated it wrong but came up with ~ 12.6:1 estimating a second valve relief of ~3cc's, .005" down in the hole and a .040" gasket thickness. Lower would actually be better.
I would say you are fairly close.
bbf-falcon- Posts : 8995
Join date : 2008-12-03
Location : Jackson, Ohio
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