Does anyone Knows the Rocker Arm Ratio for B16? Is it different for the intake and exhaust?
I have a JDM P30 EG6 JDM B16a3, Civic VTi Hatch.

I measured the original cams lifts and found this:

Base: 29,4mm
Intake: 35,7mm
Exhaust: 35,4mm

So:
In Lift=35,7-29,4=6,3mm
Ex Lift=35,4-29,4=6,0mm

Manual specs for this cams:
In Lift = 10.7mm
Ex Lift = 9.4mm

I know it is wrong, but calculating: 10,7/6,3=1.6984 ratio and 9,4/6,0=1,567 ratio

Does anyone knows the true ratio or how to mesure and calculate this?



Modified by gorpobr at 7:57 PM 9/6/2005

 

If you look at the pads on the rocker arms, you can see that they wear in a little square. Obviously, the cam doesn't touch all of this area at once, which means that the contact point moves back and forth as the cam rotates. Therefore, you will have a bit of variation in any rocker ratio you specify. A safe value would to measure from the middle of the square, as that will probably be closest to the point the cam contacts at maximum lift.

 

I measured the cams, not the rocker arms.
What I need to know is how I can get or calculate this lift numbers(in 10.7 ex 9.4)

 

Bump

 

No one knows?

 

I am measuring like this picture:

 

Up

 

Up

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drdisco69 &raquo;</TD></TR><TR><TD CLASS="quote">A safe value would to measure from the middle of the square, as that will probably be closest to the point the cam contacts at maximum lift.</TD></TR></TABLE>

Actually, max lift will occur at the back of the square since the rocker arms are on a solid pivot point.