Holley 4 corner adjusting

rod7515 said

Are there any good defining articles to tuning a holley 4 corner carb? I need to work with mine once I get my cooling issue cured. I've never had a 4 corner carb before. I am working with a 750 dp on a 408.
Thanks Rod

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It's pretty much the same as any carb. Once the engine is warmed up, adjust them 'til it runs the best, then set them a wee bit richer if you were only checking in neutral. With an automagic you can put it gear and check the vac and rpm abd tweak it a little closer.

Here's the deal. A four corner idle that is calibrated the same as a 2 corner doubles the circuits that see manifold vacuum. This means fuel flow at idle can be doubled.
Four corner can be helpful if the idle vacuum is poor, and a PIA if the idle vacuum is strong (over 14"Hg).
In between, it should be OK, you'll just have to play with it. Having control over the different corners may help because they can be tweaked for more even distribution to the cylinders.