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Czar of C.R.A.P.
Join Date: Jul 2003
Posts: 2,323
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questioning backside valve adjustment
Trying to set valves on my rebuild. Using the backside method of adjustment with .0025 and .003 for the gauges. If I set this way then install a dial indicator I get .003 after adjustment. I know this method was developed for a 2.7 is the rocker ratio different for a 3.2 carrera.
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66 912 Coupe 84 Carrera Cab Hardtop HC3.4 Hyper Carrera 2005 Dodge Magnum 5.7 HEMI Cabriolet Racing And Performance C.R.A.P. Gruppe #1 Put on some C.R.A.P. and drive.... |
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01-12-2007, 07:10 AM
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Air Medal or two
Join Date: Jul 2003
Location: cross roads
Posts: 14,089
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I dont see how the ratio would make a diff....
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D troop 3/5 Air Cav,( Bastard CAV) and 162 Assult Helicopter Co- (Vultures) South of Saigon, U Minh Forest, Delta, and all parts in between |
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01-12-2007, 06:41 PM
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Registered
Join Date: Jun 2004
Location: Rio Rancho, New Mexico
Posts: 1,325
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Same rocker from at least '72 to '89. Part no. 901 105 043 00.
The rocker ratio does make a difference. The ratio is 1.4 to 1 when the rocker is resting on the base circle of the cam. Simple math. Divide .004" by 1.4 and you get a number between .0025" and .003". Thus the entire premise to the backside method. If the gap is set at .004" at the elephant foot and valve, the gap at the rocker and cam base circle will be between .0025" and .003".
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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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01-12-2007, 11:30 PM
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Air Medal or two
Join Date: Jul 2003
Location: cross roads
Posts: 14,089
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thus we all get a education...thanx,,,
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D troop 3/5 Air Cav,( Bastard CAV) and 162 Assult Helicopter Co- (Vultures) South of Saigon, U Minh Forest, Delta, and all parts in between |
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01-13-2007, 06:23 AM
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Czar of C.R.A.P.
Join Date: Jul 2003
Posts: 2,323
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I guess I don't know why it didn't work on mine then. If I did the backside as described then tested with a dial indicator I only had .003 gap. I wound up using the dial on all the valves.
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66 912 Coupe 84 Carrera Cab Hardtop HC3.4 Hyper Carrera 2005 Dodge Magnum 5.7 HEMI Cabriolet Racing And Performance C.R.A.P. Gruppe #1 Put on some C.R.A.P. and drive.... |
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01-13-2007, 10:41 AM
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