holley 4160 help. 600cfm.

OldmanRick said

I know you made some progress recently on this (from another thread) and I think your getting close.

I'm not convinced that the secondaries are open too late. As Mattax said, opening a little quick can give the same sensation also.

I believe you still have the tight converter and 2 series rear gear. Some of what your feeling may just be the "engine getting up on the cam" between the 2 to 4 grand transition area.

Click to expand...

Yes Rick, my vacuum is at 12-12.5 at idle, in drive. It does feel more balanced out on a 1/3 throttle take off now with the 8.5 power valve. Is this a typical result? Also could I go fatter on the jetting you think?

And finally, I have looked at purchasing the metering plate adapter for the rear so I could use standard jets, wondering if I should be making changes there since I have went from a 65 to a 68 on the primary? And I am running the lightest spring for the secondary actuation.