Quote:
Originally Posted by enkeivette
Yes. Tune was f'd in the A, which is why I blew a piston. Those were base line figures.
CobraSS, Secondary - 80 / Primary - 94
I think you're supposed to keep them within a difference of 10, but at this point I might tell that rule of thumb to suck it.
Today I replaced the stock (33?) high speed air bleeds with some 28s, huuuge difference. Check out the graph, close to 12:1 under boost (only opened it up to about 5 lbs to be safe).
The rpm is not accurate (black line) but at least you can tell when I opened it up.
Tomorrow I plan to drop the primaries, prob down in the 76 range.
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The secondaries should have the larger jets, not the primaries. I hope you have those labeled wrong in your post. If you do have larger jets in the primaries that would explain why your cruise ratio is so rich and you should switch them.
For the lean tip in, that's normal. As long as it isn't lean misfiring your fine. Back when I had the 396 in the Chevelle I had to make my own cam to fine tune the tip in. I just used my Dremal and shaped it until I had the results I wanted.