Not Ranked
Holley run fine right out the box on 90% of V-8's provided you picked the right size carb, (no 850 DP's on a 289's). Demons REQUIRE you to tune them. The holley will work alot better if yoy do tune it, of course. Demons have little issues I don't like: their bowl screws are too short and strip out, needing helicoils. They look "wrong" for a restoration or vintage application. I hear guys get a little more HP out of a well set up demon on the dyno, but I have seen several that were swapped out for mildly reworked holleys much to the delight of the owners. Holleys have not been going down in quality. Besides, there are a million of them out there, waiting to be rebuilt. I just have not been impressed with demons yet, but they are better than the BG carb that came right before the demon, the one that holley apparently (or so the rumors were told) sued over, making BG change the appearance slightly so it wouldn't be a copy. I know of one of those for sale or trade for equivilent holley.
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