Hello all, I am building up a 1976 2.7 with E spec Webcams and 9:5:1 90mm JE pistons and Nickies for my street car.
What valve spring installation height spec' should I use for this hot rod mish mash?
Waynes book shows the following:
Valve Spring Heights: Intake / Exhaust
911E 1969-71 35.5 / 35 (+/- .3)
911E 1972/73 34 / 34 (+/- .3)
911S 1975/77 35 / 35.5 (+/- .3)
The 'E' Webcam spec (I am installing) vs. the stock 75-77 2.7 intake/exhaust valve lift
E Webcam: .408 / .390
75-77 cam: .405 / .350
Logic tells me to use the 1969-71 spring height settings b/c the 72-72 cam was retarded by 2deg. I want to make sure the valves are performing correctly and I am not causing any undo wear.
