Best way to set the balance is to remove the cover screws for the progression holes. Carefully look through the center progression hole and adjust the IDLE screw so that you can see the edge of the butterfly centered in the center progression hole. Then carefully adjust the central balance screw until both carbs butterflies are in exactly the same position. All four ports should align the same, if not then the throttle shafts are twisted or the progression holes were drilled wrong. Reinstall the progression hole covers and start the motor. Now adjust the IDLE stop screw to get the idle correct and you should be good to go. Dont forget to check to be sure that you are getting full throttle when the gas pedal is depressed to the floor. I find many cars get only partial throttle because of excessive carpet padding.
On Sat, Jun 6, 2015 at 8:58 AM, <[email protected]> wrote: > Gentle Alfisti, > A brace of DCOE4 carbs are proving difficult to balance and I want to get > them just right. So I cobbled-together a manometer from two vertical > plastic tubes and rubber stoppers and am drawing vacuum from the brake > booster inlet and the mirror side opening inlet on the adjacent carb. I > fiddled with this contrivance all morning and I still cannot get the carbs > to exhibit equal vacuum. Please, Digest, tell me if the opening of the carb > butterfly by means of the central balance adjusting screw will increase the > respective vacuum in the system downstream from the opened throttle plate. > Or is it the other-way-around? In other words, will putting the throttle > plate on it's idle stop ( fully closed) increase vacuum at the downstream > port? Does the brake booster air valve effect the results of my > comparative balance test? Thank you one and all. > modelle > 105.04 gd > e-mail me directly for pictures of the manometer rig. > -- > to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi > or email "unsubscribe alfa" to [email protected] -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected]
