Hi.
while installing these Jesel shaft rockers, there were some issues. Instructions say use shims if you have 0.100 longer valves. Do I have longer valves in the edelbrock heads? No, they're 4.911 long.
Does it need to be shimmed, then? Well, lets look at the rocker geometry.
Here's picures showing how the roller tip will hit valve when at start of valve lift. First without, then with shims.
As far as I can see, the roller hits the valve tip "better" with shims.
I tried to measure horisontal roller axis VS fulcrum axis at 50% valve lift (no pics, sorry), but I couldn't really find much difference. Can do better by painting a line on the rocker, for instance.
So; do I use the shims or not?
(I did find some information here, but not very helpfull:
http://www.hardcore50.com/vbulletin/...ad.php?t=51083 )
Anyway, here's the pics:
Hope your weekend is great...