Marc, Could you clarify your last post. The thread was about a problem with a 34-Pict-3 carb (dual port); so can I assume you're saying not to mix and match VW parts of differing applications; specifically the single port vacuum only advance distributor with a 34-PICT-3. Or is there a problem with the single port Vacuum advance distributor even in the stock application on the single port engine. In other words, do you suggest using a 009 distributor instead of a stock vacuum advance unit on a single port motor (stock configuration)?
Thanks, Brian ----- Original Message ----- From: "marc vellat" <[EMAIL PROTECTED]> To: "Air-Cooled Volkswagen Discussion List" <[email protected]> Sent: Sunday, May 06, 2007 7:43 PM Subject: Re: [vintagvw] Carberator Problem? > If you have a stock DUALPORT distributor it's worth a > shot. The vacuum-ONLY type used on singleports has its > own issues - it'll most likely provide too much > advance, too soon, which can harm the engine...I'd > choose the 009 over it. > > --- Eric Larson <[EMAIL PROTECTED]> wrote: > >> Would changing the distributor really make that much >> of a difference? I'm running a 009 cent only >> advance. I've heard people say that the cause >> hesitation, and I've heard others say they are >> better. Maybe I'll put the stock vacuum advance on >> and see how it works. I'll double check all the >> typical vacuum leak areas like you said. I might >> have missed something. >> >> Eric >> ----- Original Message ----- >> From: Mike<mailto:[EMAIL PROTECTED]> >> To: Air-Cooled Volkswagen Discussion >> List<mailto:[email protected]> >> Sent: Saturday, May 05, 2007 8:27 PM >> Subject: Re: [vintagvw] Carberator Problem? >> >> >> The accel pump adjustment is to compensate for >> slight differences/wear in >> the accelerator pump itself and linkage slop .... >> If I remember from my >> rebuild kit and Bently manual, the spec on the >> pump is a certain number of >> CC's of fuel for a given number of "squirts" with >> the pump activated thru >> the throttle linkage. If you get too much total >> fuel, you adjust it back and >> vice versa. >> >> The stock main jet on the carb is a little on the >> lean side; this was part >> of the first attempts at exhaust emissions >> reduction on the engine. The >> stock main is a 127.5 and I replaced it with a >> 130....much better. >> >> Like Mark suggested, another possible cause for >> the stumbles is a blocked >> manifold heat riser or one with insufficient flow. >> If you have a stock >> muffler (or an aftermarket with the heat riser >> pigtail) make sure the end of >> the pigtail is centered in the exhaust outlet >> (remove the left tip, look >> into the muffler and you should see the outlet end >> of the pigtail centered >> in the opening....if it is cocked slightly, use a >> big screwdriver to center >> it... muffler exhaust flow around the end of the >> pigtail helps draw the heat >> riser exhaust flow. Check to make sure your center >> manifold to cylinder head >> riser rubber couplings are not leaking. Check to >> make sure your throttle >> plate bushings are not leaking air (unhook the >> return spring from the >> throttle arm and try to move it up and down/fore >> and aft....anything but the >> slightest hint of movement means you have worn >> bushings). >> >> mike >> 73T1 >> >> >> >> ----- Original Message ----- >> From: "Eric Larson" >> <[EMAIL PROTECTED]<mailto:[EMAIL PROTECTED]>> >> To: "vintagevwlist" >> > <[email protected]<mailto:[email protected]>> >> Sent: Saturday, May 05, 2007 11:37 >> Subject: [vintagvw] Carberator Problem? >> >> >> > What does the adjustment on the accel arm of a >> 34 Pict -3 carb supposed to >> > do? I assume it makes the accel pump squirt >> faster when you hit the >> > throttle? (I have the non-alternator carb that I >> modified to work.) >> > Problem is - hesitation. it hesitates after it's >> warmed up. The hesitation >> > isn't there when you rev it in neutral. Can you >> adjust that out with the >> > accel arm adjustments? Do I need bigger jets? >> > >> > I'm also running 33" mud tires, which I'm sure >> doesn't help things. They >> > really kill the power. No power off the start, >> and it hesitates when the >> > choke turns off. Anything below 2000 rpm is >> slow. Descent power till about >> > 3500 rpms, then slow again. Should I try >> different tires and see if the >> > flat spot disappears? Or should I adjust the >> carb some more? I have a set >> > of Kadrons. Would they help with the tire/power >> problem? Any ideas are >> > appreciated. >> > >> > Eric >> > _______________________________________________ >> > vintagvw site list >> > >> > [email protected]<mailto:[email protected]> >> > >> > http://lists.sjsu.edu/mailman/listinfo/vintagvw<http://lists.sjsu.edu/mailman/listinfo/vintagvw> >> > >> >> _______________________________________________ >> vintagvw site list >> >> > [email protected]<mailto:[email protected]> >> >> > http://lists.sjsu.edu/mailman/listinfo/vintagvw<http://lists.sjsu.edu/mailman/listinfo/vintagvw> >> _______________________________________________ >> vintagvw site list >> [email protected] >> http://lists.sjsu.edu/mailman/listinfo/vintagvw >> > > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > > _______________________________________________ > vintagvw site list > [email protected] > http://lists.sjsu.edu/mailman/listinfo/vintagvw _______________________________________________ vintagvw site list [email protected] http://lists.sjsu.edu/mailman/listinfo/vintagvw
