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Old 08-25-2012, 03:35 PM
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UngerMarkus UngerMarkus is offline
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Hi guys! It's a mallory hei distributor. I tried both, ported vacuum and manifold vacuum. Manifold works best, but it didn't cure the problem. The secondary spring tension was the first thing I thought about too. I tried everything from very loose to very hard. The stuttering seemed to be a little less intense with the hardest spring tension.

The theory with the secondary wells not drilled seems more and more plausible.

What do you think about this test?:

In case there is something wrong with the secondaries, I could keep them from operating using some duct tape and tape them shut. Now the qjet should work like a 2bbl carb. If the stuttering at wot is gone, its obvious there is a fuel delivery problem that causes the engine to run lean.
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