440 six pack high idle

413 said

The outboard carbs have an idle circuit. If you block them off from the intake the car will not idle well at all. You will be causing more problems.

don’t disconnect the outboard Mechanical linkage and drive the car. That linkage closes the carbs.

Male sure the outboards are closed and disconnect the vacuum lines so they will not open. then run and drive the car and see what happens.

Make sure the throttle cable isn’t holding the center carb open. Disconnect it and leave the return spring on and run the car and check the idle speed.

How much idle vacuum does this have? How big does the cam sound?

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I’m gonna do some testing tomorrow and report back with results. I haven’t checked idle vacuum yet, but I will.

I am enough of a novice to where I struggle to find the right terms to describe how the big the cam sounds. Let’s just say it definitely sounds bigger than the mild cam in my Scamp, but tame enough to be a street cam. Maybe street/strip? I hope that makes sense. The engine’s “build sheet,” if that’s what you wanna call it, just says what the mechanic did to the engine, not what he put into it. I’m a little bummed about that, because I have no way of knowing exactly what cam, springs, lifters, etc are in the engine unless I tore it apart. And even then I don’t think I’d be able to tell what the cam was just by looking at it.