Originally Posted by JohnRR
Originally Posted by parksr5
Originally Posted by fast68plymouth
Quote
If I'm understanding you correctly, if the cam had a little less duration, it would potentially pick up peak torque and HP and carry the gains for a little longer?


Not exactly......... and without testing you wouldn’t know for sure.
And since the intent is to run it with ex manifolds, it would need to be tested that way.

What I’m saying is........ a shorter duration cam “might” make a higher peak tq number.
“If” that happened, and the fall off after peak tq was the same drop in tq/rpm as the current cam, for enough rpm after peaking........ it could end up making more hp.
But.... We’re not talking big changes here.
And I’m not really advocating you change anything........ I’m more just “thinking out loud”.
Again, the test would only be valid if you used the ex manifolds.
Trying to do R&D for an ex manifold combo........ by testing with headers...... is pointless.


Thanks for clarifying!

I was bummed we didn't get to test it with the manifolds. We'll just have to see what it does at the track.


Curious , why wasn't the testing done solely with the exh manifolds?


The engine builder and dyno operator wanted to monitor EGT's and the dyno headers were set up for that. Things really didn't go as planned with the dyno, I felt like I was kind of at the owner's mercy on when we could get the engine in. I did think about bringing the maniflods and head pipes with me to make a few pulls with them but, I knew he had other things going on that day and just didn't bring them or ask if we could switch things over.