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Registered
Join Date: Jun 2004
Location: Rio Rancho, New Mexico
Posts: 1,325
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Stu,
If the compression gauge checks out OK, I would say it is time for a leak-down test.
You did mention the throttle was open during the test.
Did you hone the Alusil cylinders?
Could be rings that haven't seated?
As John Walker mentioned "slow cranking".
If indeed the compression is that low "with the throttles open" and "cranking up to speed", a leak down should tell us where the air is going.
An answer to the low numbers would be nice.
__________________
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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