440 power gains/ aluminum head advantages?
Assuming a rocker will produce the lift from the stated ratio will lead to errors. Numerous factors such as prod length will affect the final ratio: ie lobe lift multiplied by the rocker ratio equals the valve lift. The ratio changes during the sweep of the rocker. Below are some rockers D. Vizard tested & as you can see the ratios are all over the place.
If you want accurate results, measure off the lifter....
Assuming a rocker will produce the lift from the stated ratio will lead to errors. Numerous factors such as prod length will affect the final ratio: ie lobe lift multiplied by the rocker ratio equals the valve lift. The ratio changes during the sweep of the rocker. Below are some rockers D. Vizard tested & as you can see the ratios are all over the place.
If you want accurate results, measure off the lifter....