Thread: progressive dual quads.

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Thanks Denny
this is the best pic i can get of the linkage, i'm just worries that i should be set up 1:1 insted of progressive.

yes that is the linkage i have. there instructions say it can be either way progressive or 1:1. depending on how you set it up. i have called there tech line numerus times and can never get a straight or the same answer on how to tune or set up, first it was 2 turns out on bolth, the next time it's 1/2 on front 1 1/2 on rear. then it was 3/4 turn on all. so i set it up 1/2 on front and 11/2 on rear progressive.
my problem now is i talked to a performance engine builder and he said never run progressive unless there is a center carb to even out the fuel or you will damage the motor due to a lean condition in the front (if the front is secondary) so now i dont know what to do.

ok, so for ideling i sould set all the idel mixture screws the same, and have the primary carb open a little before the secondary carb. If i do it that way witch carb should control the idel speed or should i use idel speed on bolth set at the same.

P.S. if i did not mention it before thanks for all your help..

Alot of things are needed to tune it, what type of build is the motor, stock, mild cam, street, race. I ran my cars 2x4's on a tunnel with progressive (not much), on the street, and on the boat with 1:1 with 2x4's on a blower.
I use a synchronizer ($15.-$25.00) and set them the same, 1st you need to set the carb Idle stop screws to what the book say's, you should not have to move them at all, if you do, don't go past the idle ports, or it won't idle right, and or hesitate. Then you start the motor and sync the carbs to the same vacuum, then turn your mixture screws evenly to set the idle, keeping the vacuums the same. once your there, you should be able to use either set up, you may have to back down your accelerator pump shots depending on you motor & or your jets. I don't know what jets you have, or need for your motor, but odds are you need smaller ones.
I adjust everything with the linkage off 1st, the I put it back on and make sure it still idles the same. After you get it tuned you can use the linkage both ways and see which you like best. You'll probably end up with 1:1

Pat