TQ secondary not opening up all the way

oldkimmer said

No the rear butterflies were never designed to fully open vertical. They direct some air and fuel towards the front of the intake to balance out the air fuel ratio as the front butterflies are very small. It is not a GM quadrajet. Kim

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That's the silliest reason I've ever heard for factually wrong info.

First off, the secondaries have nothing to balancing air fuel ratio. Either the primaries are correct on ratio or they're not, and ditto the secondaries. That's what jets and accelerator pumps are for.

Second, directing airflow is an intake manifold job, not a carburetor job. If you ever changed intakes, how would you know how to adjust this to match the intake?

Third, HOW MUCH from vertical should they be? Oddly, Carter provides an adjustment method, right next to the spec of 90 degrees, but no spec for any other angle is listed, nor is there any way shown to measure it.

4th (Edit, I was wrong on this one)

From the Carter carburetor manual section on TQ's (which is also the same spec as all other Carter 4-barrels including the WCFB, and every four-barrel I've ever seen):


And FYI, the 90 degree spec is also the same on Rochester Quadrajets, as installed on Chrysler vehicles, too. :thumbsup:
Go readjust your TQ's and pick up some ET's.