What rocker arm ratios do people see? Options

[stugray]

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

[stugray]

I will get pics of the test rig after dinner, but here is the "cam card" that I got from Jake:

(IMG:http://www.914world.com/bbs2/uploads_offsite/i366.photobucket.com-10819-1355965443.1.jpg)

So I guess I am "off my meds"...?

So if I follow Jake's EXACT wording from his valve geometry adjustment, I need to set my valve lift to .368. I'll get right on that (IMG:style_emoticons/default/confused24.gif)

I am currently in the "check valve to piston clearance" step (step 1) and I have 0.73 from the intake valve to the piston (when I plan on removing 0.050 from the heads), but I guess I just "have issues"


I'm done...peace out. (IMG:style_emoticons/default/wacko.gif)


And BTW - I fully profiled the cam myself, and those numbers up there with the asteriks (*) must mean - "or somewhere around that"....
The only number I got that matches is the lift and I measure 0.388 when the card says .368, but I did not have full spring pressure on the lifter, so close enough for now.

Stu

[Todd Enlund]

And BTW - I fully profiled the cam myself, and those numbers up there with the asteriks (*) must mean - "or somewhere around that"....

Those are duration numbers, and the * should be a °.