Ring gaps for my 452

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Ring gaps for my 452 #890099 12/28/10 12:59 PM 12/28/10 12:59 PM
Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually B BradH OP Taking time off to work on my car
BradH OP Taking time off to work on my car B Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually	This is the first time my engine will have been assembled w/ conventional file-fit rings since it was built waaaaay back w/ "gapless" stuff. The PBM-branded rings supplied by the local machine shop that did the re-hone on the cylinders are plasma-moly / reverse back-twist / standard oil tension in the 1/16", 1/16", 3/16" size. I don't know if I should consider my combination "moderate" or "serious" for gapping purposes. Moderate would use .004 top / .005 2nd per inch of bore diameter vs. .0045 top / .0055 2nd. For a 4.380" bore, that works out to... Top --> .004 = .018"; .0045 = .020" 2nd --> .005 = .022"; .0055 = .024" Engine will be spun up to 7K RPM and run w/ 10.8 CR on 93-octane pump gas. Also, the top ring position is .175" below the deck. Guidance requested. Last edited by Blew My Budget!; 12/28/10 01:08 PM.

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