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]

bob-

Nobody will try to help you if you continue with your argumentative attitude.

I see nowhere in the previous post that could be considered "argumentative". Sorry if it seemed as such it was "just the facts".

MY Raby cam card shows the peak cam lift and peak valve lift based on 1.3 rocker ratios.

Mine does not mention rocker ratios, but here is what is does say:
Intake Exhaust
Valve Lift: .368 .368

I dont need to post any further info to show that those numbers clearly represent Cam Lobe lift.
Since my measured Valve lift is:
Intake Exhaust
Valve Lift: .548 .480

So it is clear that THIS cam card from Jake shows "cam lift" not "valve lift".

All factory Type IV lifters regardless of 1.7, 1.8 or 2.0 have a 1.3 ratio. Go with 1.3, stop trying to re-evaluate a known value.

Sorry, but I just measured my exhasut & intake rocker ratio and "they" are not 1.3.
They are 1.3 - Exhaust and 1.4 - Intake, just as was verified by others above.

So still trying to understand but:

Look at the value for peak lift valve on your cam card and shoot for that.

wont work unless I want to change to 1:1 rockers

Perhaps what I got as a "cam card" and what you got are very different.
I would just scan the damn thing & post it, but I'm sure somebody would say that's not right...
It only has 8 numbers on it and 4 of them have "*" astericks but no footnote...

Stu