6 Pack question

[Andrew]

Should the outboard carburators suck any air at idle??

 

[Meep-Meep]

As with most Holleys you want the stop screw to just make contact with the lever so the blades don't stick in the bores. Nothing more. So yes, they will allow some air to get by. There should be a stop screw accessible from the bottom of the throttle plate. There are also idle mixture screws that are not very accessible. Since there will be a tiny amount of air admitted into the engine around the throttle blades you will need to supply a tiny amount of fuel to keep the mixture correct at idle. If you have the blades open too far you might end up with a dieseling problem. Actually, six packs are prone to dieseling, which is why they came with an idle solenoid. You will notice a long lever on the throttle linkage with a screw in it and that is what contacts the solenoid and where you set your idle speed. The solenoids are being reproduced but they are about $100.00. If you don't care about originality and have fabrication skills just find an A/C solenoid in the wrecking yard and make it fit.

 

[Andrew]

Thanks Meep,
I thought that ws the case, but I read an article on tuning chevy tri-power and they mentioned the outboard carbs flowed no air at all when idling, and that you can tune the center carb by putting a blocking plate on the outboard carbs.

 

[rumblefish360]

I think that would be the ideal thinking and way it would like to work, but in actual working conditions.