Mike, as you state, with the 4 corner adjustments, once you get the floats happy, they are awesome, and seem to be much more responsive and fine tuned than say a Demon.
They of course have the interchangeable power valve on the primary as well.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: miket1</div><div class="ubbcode-body">I need 2 of these for 540 cu. inch Merlin engines on my Fountain Powerboat, I am looking for good idle qualty, Holley says with the 4 corner idle adjustment & new designed air bleeds that at idle it is more tunable and sharper, that is what I was curious about compared to the older version Holley carb. </div></div>
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