I had a 670 Truck Avenger that had metal left over from machining the fuel blocks in the channels behind the jets (so much for quality control?) I would pull the carb apart and remove all the jets, and then blow out all the channels and air bleeds, and/or run a small wire through them to make sure there is nothing blocking the passages in the carb.
I have had two avenger carbs, and both were tuned pretty lean in the idle and power valve restrictions. I think they were around 0.025" diameter?
I think went to about 0.028 or 0.030" with pin drills and that really helped the idle transition and power under load.
Ill open her up a take a look at the secondary jets and metering block.
I did try wiring the secondaries shut and took her for a test drive. After good off idle accel I hit a flat spot, stumble and then I am able to continue to go up in the rpms, unlike before. Seems better, but not sure what to make of this? I have the stiffest spring(black) installed. Should I go down in secondaies jets?
