Originally Posted by fast68plymouth
Glad you had a stress free dyno day.

What rpm were you seeing the valvetrain unhappiness start?
The airflow numbers look good all the way til the end on that pull.


I had a lot of anxiety on the drive up there yesterday...
Every time it got in the 5300-5400 rpm range, it appeared, and the dyno operator said it sounded like it was only one or two cylinders at first. When I tested the pressures, I recall that the springs were kind of all over the place and not that consistent. I posted about it once that the Trickflow numbers didn't line up with the PAC specs, from the part numbers provided.
I guess I could shim the springs and retest?


Last edited by Uberpube; 03/01/24 08:05 PM.