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Information Overloader
Join Date: Mar 2003
Location: NW Lower Michigan
Posts: 29,466
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964 Cams/valve adjustment
I'm pretty sure the valve clearance with 964 cams is .004 same as stock; correct? Can someone quickly confirm this. Also, is the rocker/cam clearance between .0025 and .003 also same as stock?
Thanks. |
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05-25-2006, 05:56 AM
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Registered
Join Date: Jan 2003
Location: Langley,B.C.
Posts: 12,030
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Valve clearance is the same.........
Cheers
__________________
Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
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05-25-2006, 06:18 AM
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Information Overloader
Join Date: Mar 2003
Location: NW Lower Michigan
Posts: 29,466
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Thanks Jeff.
Jim |
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05-25-2006, 06:19 AM
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Registered
Join Date: Jun 2004
Location: Rio Rancho, New Mexico
Posts: 1,325
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Jim,
The rocker/cam clearance is .00285" when the rocker/valve clearance is .004". Simple actually, the rocker ratio is 1.4 to 1. Divide .004" by 1.4 equals .002857143", rounded off to .00285". Check the rocker/cam clearance with a .003" shim. If the shim slips in between, the gap is too big, over .004" at the rocker/valve. Then check with a .0025", it should slip in between the rocker/cam. If it does fine, if it doesn't the gap at the rocker/valve is less than .0035". So the .003" is the over gauge, the .0025" is the under gauge. Works fine, don't need some special shim holding tool.
__________________
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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05-25-2006, 05:53 PM
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Would this advise be the same for a 965?
__________________
Kirk Crashed: Silver 1992 Turbo S2 Sold: '86 930 minor mods; '94 3.6 Turbo; '85 Euro 930 (3.2 Intake, Tec3r EFI, TwinPlug, Garrett Turbo, JE 8.1 Pistons, 505 rwhp) |
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06-28-2006, 12:32 PM
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Registered
Join Date: Jun 2004
Location: Rio Rancho, New Mexico
Posts: 1,325
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DRV2FST,
Since the 965 turbo is based upon the 964 engine, I would expect the rockers are the same. From what I understand, the 993 engine, with the hydraulic rockers was the change over. My best advice,
__________________
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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06-28-2006, 06:21 PM
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Thanks. I guess I'll get into that this weekend.
__________________
Kirk Crashed: Silver 1992 Turbo S2 Sold: '86 930 minor mods; '94 3.6 Turbo; '85 Euro 930 (3.2 Intake, Tec3r EFI, TwinPlug, Garrett Turbo, JE 8.1 Pistons, 505 rwhp) |
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06-29-2006, 05:52 AM
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1985 Porsche 930 3.3 turbo
