I reckon that might have been the problem I had with my single DCOE (too small progression hole). I did what you said - fitted a large idle jet which covered it up!
----- Original Message ----- From: Chris Howard <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, October 02, 2001 6:15 PM Subject: RE: weber tuning > I reckon the problem is in the progression holes which are drilled into > the body of the carb. These holes are uncovered when the throttle is > opened slightly and richen the progression stage. They are probably too > small for your engine which will run lean under slight acceleration. By > fitting such large idle jets, the problem is masked somewhat. Thats why > it got worse when you went down to the 50s. If you are lucky your carbs > will have little screws which you can undo and see the progression > holes. These are located just behind the idle mixture screw. Some carbs > however have a pressed in brass plug which makes it difficult to access > the holes. > > Give us some more info like what size chokes, main jets, air correction > and emulsion tubes you have. > > Cheers, > > +--------------------------------------------------------+ > | Chris Howard | Email: [EMAIL PROTECTED] | > | '69 Datsun 510 | Web: http://turbovan.com/ | > | '80 Escort Van SR20DET | Work: http://wattlesoft.com/ | > +--------------------------------------------------------+ > | Forced induction - 'The replacement for displacement.' | > +--------------------------------------------------------+ > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]] On Behalf Of Duncan > Shillito > Sent: Tuesday, 2 October 2001 6:14 PM > To: [EMAIL PROTECTED] > Subject: weber tuning > > > listers, > > i'm having fun trying to achieve smooth slight acceleration with twin > 45s on my 2.3 L series. full throttle is good but it backfires through > the carbs during slight accel and cruise. i'm thinking that the idle > jets are too large and there is too much fuel. > > i have 55F9 jets but have tried 50F6 - worse. > > there is a aluminium spacer under the head (starting to leak oil)- > achieving 9:1 comp now but over 10:1 without it. > > any ideas ???? > > thanks in advance, > dunc. > > > > Get your FREE download of MSN Explorer at http://explorer.msn.com > > --membersozdat------------------------------------------------------- > OZDAT Mailing List Please Note:- > Send (un)subscribe requests to [EMAIL PROTECTED] > Send submissions to [EMAIL PROTECTED] > No unauthorised redistribution of this email > http://www.ozdat.com/ozdatonline/index.htm > http://www.ozdat.com/ozdatonline/listindex.html > http://www.mail-archive.com/[email protected]/ > --------------------------------------------------------------------- > > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
