Stupid question, do you have the correct rockers?
Exhaust rocker geometry question
- Thread starter 63409impala
- Start date
Whoops, I see that has been asked. I still would double check with the mfr.
63409impala
Well Known Member
I just want to drive my car. I don't ask for much... lol. And I also just want to say thank you to those who have commented here to try to help me solve what I have going on.
As James has said, with the.100 longer valve, the rocker arm setting higher on the stud moves the roller tip of the rocker futher to the outside of the valve stem. Although it looks to close to the edge by eye, if you put some machinist blueing on the roller tip and check the contact print on the valve tip, turn the engine over through the valve opening and closing cycle, the blueing pattern should be safely away from the edge of valve tip. It won't be centered ,but can be safely run as long as the pattern is away from the edge. There will be a compromise here between trying to center the pattern and shortening the sweep across the tip . Play with your adjustable pushrod lenghts until you get an acceptable compromise at the tip pattern. Acceptable pattern will probably be 2/3 to 3/4 toward outside, it will be fine, lots of these engines have logged many street miles and race track passes with no trouble in this manner.
63409impala
Well Known Member
Ok. Ill see if I can figure it out
63409impala
Well Known Member
So, is there any rockers that prevail on 409s with 690 heads and a cam over .600 lift?