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:vintagvw@lists.sjsu.edu> > 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" > <vintagvw@lists.sjsu.edu<mailto:vintagvw@lists.sjsu.edu>> > 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 > > > vintagvw@lists.sjsu.edu<mailto:vintagvw@lists.sjsu.edu> > > > http://lists.sjsu.edu/mailman/listinfo/vintagvw<http://lists.sjsu.edu/mailman/listinfo/vintagvw> > > > > _______________________________________________ > vintagvw site list > > vintagvw@lists.sjsu.edu<mailto:vintagvw@lists.sjsu.edu> > > http://lists.sjsu.edu/mailman/listinfo/vintagvw<http://lists.sjsu.edu/mailman/listinfo/vintagvw> > _______________________________________________ > vintagvw site list > vintagvw@lists.sjsu.edu > 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 vintagvw@lists.sjsu.edu http://lists.sjsu.edu/mailman/listinfo/vintagvw
