Too much power too quickly with 8 barrels !

[DanEC]

Originally Posted by Antny

Simply "disconnecting" one carb would lead to very poor performance. The carb will still suck air without any gas in the mix....leaning out the resulting mixture pretty badly. A dangerous state of tune. You'd need to adjust the linkage to ensure that the butterflies close 100% tightly. Not sure that's possible.

If it's sucking air disconnected (and it would be unless the idle speed screw were backed completely out) - the idle circuit would still be working on it and introducing fuel in the normal fashion due to engine vacuum. The Ford FE dual quad set up idles on both carbs and except for idle mixture, the rear carb contributes nothing further until the throttle it opened 30% +/-. Basically, above idle and up to 30% throttle the engine is just running as a 2 bbl carb set up. But after 30% throttle I agree, you would get some pretty bad fuel distribution mixtures in a number of cylinders that would not be good.

[Luke427]

Originally Posted by DanEC

If it's sucking air disconnected (and it would be unless the idle speed screw were backed completely out) - the idle circuit would still be working on it and introducing fuel in the normal fashion due to engine vacuum. The Ford FE dual quad set up idles on both carbs and except for idle mixture, the rear carb contributes nothing further until the throttle it opened 30% +/-. Basically, above idle and up to 30% throttle the engine is just running as a 2 bbl carb set up. But after 30% throttle I agree, you would get some pretty bad fuel distribution mixtures in a number of cylinders that would not be good.

Yep, that's why I wouldn't go there. To block secondaries sounds like a much better idea. I'll give it a shot. Have some tuning to do on the ignition (received the recurved distributor, can't wait to try) and will use the opportunity to play with carbs...