I am not sure what the stoppers are for. Does your manometer look like this?
http://www.dwyer-inst.com/products/manometerintroduction.cfm Wayne Abbott TRC Environmental Corp. 5540 Centerview Dr. Suite 100 Raleigh, NC 27606 Office 919-256-6263 Cell 541-561-1899 Fax 919-838-9661 > On Jun 11, 2015, at 2:38, [email protected] (alfa-digest) wrote: > > > alfa-digest Thursday, June 11 2015 Volume 10 : Number 2726 > > > > Forum for Discussion of Alfa Romeos, etc. > Richard Welty <[email protected]> > Digest Coordinator > > Contents: > > [alfa] Re: weber balance > Re: [alfa] Re: weber balance > Re: [alfa] Re: weber balance > [alfa] administrivia: Powell's Books > > Alfa Digest Home Page: > > http://www.digest.net/alfa/ > > Send submissions to [email protected] > > Send administrative requests to [email protected] > > To unsubscribe, include the word unsubscribe by itself in the body of > the message, unless you are sending the request from a different address > than the one that appears on the list. Include the word help in a > message to alfa-digest-request to get a list of other majordomo > commands. > > ---------------------------------------------------------------------- > > Date: Sat, 6 Jun 2015 15:58:57 +0000 (UTC) > From: [email protected] > Subject: [alfa] Re: weber balance > > 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. > > ------------------------------ > > Date: Sat, 6 Jun 2015 09:14:18 -0700 > From: tom sahines <[email protected]> > Subject: Re: [alfa] Re: weber balance > > 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] > > ------------------------------ > > Date: Sun, 7 Jun 2015 11:15:37 +0000 (UTC) > From: ira kaufman <[email protected]> > Subject: Re: [alfa] Re: weber balance > > the procedure is to have the adjusting screws completely free.make sure both > front and rear are completely closed.if one of the front set is not the xact > same as its' mate there will be no adjusting possible.and ditto for the rear > set.if all are closed properly.screw back the center adjuster first the the > double adjuster screw.now screw in the double adjuster which engages both > front and rear till it just barely kisses it's tab.now check if all are > completely closed.there is a certain screw cap in the top of each of the four > the see with a light where the butterfly sits.only now can you start > adjusting.turn each idle screw in gently till it sits then turn it out two > turns.if the car does not start turn in the middle adjuster till she starts > then when she's warm turn the screw back till the idle is 900-1000 rpm.now and > only now can you use your vacuum gauge.you check front and then rear and if > they are not in line you must turn the double adjuster (where the little > spring sits) a quarter turn at a time anf then check after each adjustment.it > may sound complicated but once you do it once or twice it's a piece of > cake.another factor is the fuel pressure cannot be more that 5psi. > > > On Saturday, June 6, 2015 7:00 PM, "[email protected]" > <[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?B In other words, will putting the throttle plate on it's > idle stop ( fully closed) increase vacuum at the downstream port?B Does the > brake booster air valve effect the results of my comparative balance test?B > 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] > > ------------------------------ > > Date: Thu, 11 Jun 2015 06:30:02 +0000 > From: Richard Welty <[email protected]> > Subject: [alfa] administrivia: Powell's Books > > Other ways to support the digest > > Richard's Amazon wishlist: > http://www.amazon.com/wishlist/30PQXKZQN9GWX/ref=cm_wl_rlist_go > (there is more than one list on amazon, see the menu on the left). > > Powell's Books affiliate: > Krusty Motorsports (parent of digest.net) is affiliated with > Powell's Books, a highly regarded bookstore in the Pacific Northwest. > Use this link to access Powells and buy books, and it'll help: > > http://www.powells.com/cgi-bin/partner?partner_id=25667 > > ------------------------------ > > End of alfa-digest V10 #2726 > **************************** -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected]
