05-17-2016, 03:26 AM
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CC Member
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Join Date: May 2008
Location: Brisbane,
QLD
Cobra Make, Engine:
Posts: 2,797
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If you are happy with the A/F ratio at low engine speed under load 2000-3000rpm, I would leave the PVCRs alone.
For some reason, there is a few complaints of lean "out of the box" Ultra XP 850s.
Here is one thread on the subject:
new holley 850 ultra hp WAY out of wack - Yellow Bullet Forums
So I'd start experimenting with the high speed bleeds.
Gary
Last edited by Gaz64; 05-17-2016 at 05:12 AM..
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