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stugray |
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None ![]() |
I am adjusting the valve geometry while putting in a Raby 9700 cam and I am seeing .38 on the exhaust cam lift and .496 at the valve (an exh rocker ratio of 1.3) and I have a .39 on the intake with a .546 at the valve ( an int rocker ratio of 1.4) is this what everyone else gets for rocker ratios:
Intake rocker ratio = 1.4 Exhaust rocker ratio = 1.3 These are the 1.7 (1.8?) rockers that accept the 911 swivel feet. I am using the swivel feet, have modified the rocker faces, adjustable push rod, and zero lash to do the meaurements. Do those rocker ratios look like stock? I want to take 50 thousandths off the Combustion chambers to increase the CR, but my measurements say I wont have enough clearance on the Intake valve once I shave off 50 thousandths. I only have ~0.075 clearance now from the piston to the Int valve as it is with a deck of 0.030 and everything else (crank & rods) stock - flat top 96mm pistons. That Intake valve travel of ~0.55 looks huge to me. Anyone else care to comment? Stu |
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