I think it must have been more a geometry issue but still I need to go through the procedure again to figure out where it went wrong.PRH wrote: ↑Tue Oct 13, 2020 3:23 pm If lighter pushrods were indeed the cure...... that sure would seem to point towards the upper rpm problem being some sort of valvetrain control issue.
That’s a good looking curve.
I would have pulled it a little higher to see that it didn’t run into the wall right where it’s in the meat of the big power(and if it did, that would help determine where the rev limit needs to be set).
The engine was pulled for another 500 rpm to see that power dropped calmly without hitting the wall, remember this is supposed to be a rather tame street machine with the cam only in the 240's
Also I had no data on the converter other than it has been sitting behind a tired 454 so stall speed was guessed to be around 2200-2400 rpm