quote:Originally posted by accobra:
Something else to think about.
1. Where the pedestals the correct ones ? where they the correct hieght ?
2. Where the heads milled the proper hieght by CHI ?
All this would have contributed to the incorrect geometry not just a push rod too long.
The rest of the surge and bounce theory with the wrong retainers caused the overheating on the shaft and rocker arm potentially combined with the bolt caught on the last thread ... too bad we didnt still have a broken rocker for it to be tested for stress cracks and see if over heating was the cause ? hint hint.
Ron
Yea, I agree. The too long or too short of the push rod and the 1-1/2 thread business is still confusing to me. What is the difference in length of the push rod between 1-1/2 threads and 3-1/2 threads? Is that in the pedistal height or is that in the head gasket thickness?
I'm going to stick with stud mounted rockers. I understand them much better.
I didn't know that a spring can have too much clearance.
I think the reason is that these are some of the things that normally don't get looked at on an under 7000 rpm engine. I think that this is 7 to 10 thousand rpm race detailing.
I'm thinking that I wouldn't count on the springs being wrong for the application. The retainers being steel or titanium, what does it really matter? The important thing for me would be to match a CompCams retainer and a CompCams spring. They may have been the best choice for the application.
Exactly where in the manufactuters specs are the spring oscillations specified?
