Holley Transition Circuit Tuning

mopowers said
It's about a year old. Funny enough, the instructions that come with all brawler carbs mention adjustable air bleeds, PVCRs, and IFRs (see below).

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When I called Holley and asked them, I was told only the race brawlers come with adjustable IFRs and PVCRs, where as the street carbs like the one I have do not - not even on new ones. At the end of the day, I don't really care. I got a great deal on it and don't mind the extra work.

That's really interesting, because I have the Slayer VS carburetor on Vixen and it had adjustable everything, like those instructions say. I also had a brawler 650 DP that had everything adjustable. Strange indeed.