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Registered
Join Date: Jun 2004
Location: Rio Rancho, New Mexico
Posts: 1,325
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You may be right about repeatabilty on getting TDC exactly right on.
However I don't believe you or even a dyno could detect a .010mm or .010" error.
Porsche moved the SC/Carrera cam timing six degrees back and forth. I doubt many people could tell the difference.
When cam timing chains wear the cam timing can get retarded as much as 2 or 3 degrees. Tough to see that difference in performance.
I think we end up believing since we are working with thousandths of an inch or tenths of a millimeter this is rocket science. It isn't.
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DOUG
'76 911S 2.7, webers, solex cams, JE pistons, '74 exhaust, 23 & 28 torsion bars, 930 calipers & rotors, Hoosiers on 8's & 9's.
'85 911 Carrera, stock, just painted, Orient Red
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