looking at lift and talk about cam card numbers, in video i called this a engle 100 it is a 120, and also said the lift in degrees, just wanted to clarify
If you have decent ported heads. You can run 1.25 ratio rockers on a 120 cam which gives you about 497 lift. I run an engle 120 with cb 1.25 rockers on my 1835cc.
so the most efficient way I'm taking from the video on how to set your rocker arm geometry to draw an imaginary line from the tip of the valve and the bottom of the cup that the push-rod sits in, and at half lift, that line should be parallel or close to parallel with the head to have the most smooth and efficient running valve train with minimal wear and tear on engine and to get more horsepower? Is it because you want the spring to have less compression because the more you compress the spring, the more leverage and power it's going to take for the cam lobe to push the lifter up causing the pushrod to lift the rocker arm and to compress the spring?
The "imaginary line" method is basically an "eyeball" technique which is not repeatable and not the most accurate. It is highly subjective and dependent on the builder. This inefficiency leads to more valve guide wear and reduced valve function.
"totally relaxed" at "half mast" tells us nothing. The objective in performing rocker arm geometry is to find the correct length push rod when at the point of TVL/2 by way of adjusting the shims under the rocker arm such that half height results in the valve stem plane being parallel to any other un-pushed stable valve stem. How is parallel determined? Most will employ the "eyeball" method as viewed from the rocker end but if small bubble levels are used then maximum precision and repeatability can be achieved. One bubble level is placed on any other valve stem with its adjuster screw removed. The other bubble level is affixed (magnet & double tape) to the valve lash adjuster screw. Once the two levels are approximately centered when at half of total valve lift then the push rod length can be measured. Centering the rocker arm contact with the valve stem at half height will minimize valve guide wear and resistance. Follow the path of the rocker contact across the valve stem surface to fully understand.
looked like the adjuster was turned in a lot EZ suggested to have 3 threads over the top of the locking nut I had a hard time with my valve geometry when I put some EMPI solid shaft rockers on I think these air cooled VWs are borderline alchemy.
Single HD springs or dual. just curious and also since this was a couple years ago how has it held up with whatever springs you chose. thanks in advance
If you have decent ported heads. You can run 1.25 ratio rockers on a 120 cam which gives you about 497 lift.
I run an engle 120 with cb 1.25 rockers on my 1835cc.
so the most efficient way I'm taking from the video on how to set your rocker arm geometry to draw an imaginary line from the tip of the valve and the bottom of the cup that the push-rod sits in, and at half lift, that line should be parallel or close to parallel with the head to have the most smooth and efficient running valve train with minimal wear and tear on engine and to get more horsepower? Is it because you want the spring to have less compression because the more you compress the spring, the more leverage and power it's going to take for the cam lobe to push the lifter up causing the pushrod to lift the rocker arm and to compress the spring?
The "imaginary line" method is basically an "eyeball" technique which is not repeatable and not the most accurate. It is highly subjective and dependent on the builder. This inefficiency leads to more valve guide wear and reduced valve function.
"totally relaxed" at "half mast" tells us nothing. The objective in performing rocker arm geometry is to find the correct length push rod when at the point of TVL/2 by way of adjusting the shims under the rocker arm such that half height results in the valve stem plane being parallel to any other un-pushed stable valve stem. How is parallel determined? Most will employ the "eyeball" method as viewed from the rocker end but if small bubble levels are used then maximum precision and repeatability can be achieved. One bubble level is placed on any other valve stem with its adjuster screw removed. The other bubble level is affixed (magnet & double tape) to the valve lash adjuster screw. Once the two levels are approximately centered when at half of total valve lift then the push rod length can be measured. Centering the rocker arm contact with the valve stem at half height will minimize valve guide wear and resistance. Follow the path of the rocker contact across the valve stem surface to fully understand.
looked like the adjuster was turned in a lot
EZ suggested to have 3 threads over the top of the locking nut
I had a hard time with my valve geometry when I put some EMPI solid shaft rockers on
I think these air cooled VWs are borderline alchemy.
Nice, W120
Single HD springs or dual. just curious and also since this was a couple years ago how has it held up with whatever springs you chose. thanks in advance
Double and still going 6500rs