Thread: Rocker Geometry Tool

Tweet

Has anyone used this rocker geometry tool made by Proform? Thanks,

Proform Pushrod Length Checkers 66790 - Free Shipping on Orders Over $99 at Summit Racing

Suggest you use the procedure outlined by Straub Technologies in this video......
https://www.youtube.com/watch?v=o5is9BsH5OU

.

Hey Tech, I've watched that video a few times. Don't know if I did something wrong last Saturday but: I know to take my gross valve lift, divide it in half, take the 3/8 stud measurement of .042 and divide that by half the valve lift. That comes to around about 5.5 turns on the 355's rocker after I've drawn a centerline thru the rocker and lined it up with a key stock, ruler, etc. Here was the problem I found. I could put the rocker on and barely turn the nut to keep the rocker on there (forget about the center line of rocker for a minute). After that, there's not enough thread there to even allow for 5 turns. That's why i was curious about some other methods out there or tools. Thanks, Bobby

Originally Posted by Rdobbs1977

Hey Tech, I've watched that video a few times. Don't know if I did something wrong last Saturday but: I know to take my gross valve lift, divide it in half, take the 3/8 stud measurement of .042 and divide that by half the valve lift. That comes to around about 5.5 turns on the 355's rocker after I've drawn a centerline thru the rocker and lined it up with a key stock, ruler, etc. Here was the problem I found. I could put the rocker on and barely turn the nut to keep the rocker on there (forget about the center line of rocker for a minute). After that, there's not enough thread there to even allow for 5 turns. That's why i was curious about some other methods out there or tools. Thanks, Bobby

Have you tried this method ? Works fine also. Rocker Arm & Valve Train Geometry - Circle Track Magazine