 Piston / Valve clearance on a /6 |
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| ahdoman |
  Sep 15 2008, 11:51 PM
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It's phonetic...Ah-D-O-Man (Audioman)  Group: Members Posts: 667 Joined: 7-November 05 From: Santa Clarita, Ca. Member No.: 5,084 Region Association: Southern California  |
I've been reading Wayne Dempsey's "rebuilding your 911 engine 1965 - 1989" book. Really good stuff! However, I do have one question in relation to piston & valve clearance; If I understand him correctly you add the copper shims at the bottom of the barrel to adjust deck height clearance. Does adding copper shims also lower the compression ratio as well? If so, is there any ratio formula for shim thikness to ratio decline? Then if you achieve proper deck height would piston / valve clearance only change if a head was machined?
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Posts in this topic
ahdoman Piston / Valve clearance on a /6 Sep 15 2008, 11:51 PM
Cap'n Krusty Yes, the CR drops as shims are added. However, yo... Sep 16 2008, 12:25 AM
smdubovsky Krusty is spot on. Though I'll add a little b... Sep 17 2008, 08:59 AM  |
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