Hmmm. All of the "137" distributors took the 03 001 cap; I was expecting yours to be a "139" with the 03 037 cap. http://www.oldvolkshome.com/ovhignbo.htm Relative prices of the different tune-up parts are here (note that the 02 170 condenser is obsolete/NLA):
http://home.comcast.net/~marcsoutlet/site/?/page/Bosch_ignition_parts/ Anyway, the surface area of the vacuum diaphragm and the tension of the return spring determine the advance "curve". A larger diaphragm is going to exert MORE pull than a small one at a given vacuum level, so it's not generally a good idea to play "mix and match" with these things. The length of the link arm is often different, too - in that case the breaker plate may reach the limit of its travel before the canister does. --- asad ishaque <[EMAIL PROTECTED]> wrote: > > Thanks Marc for the advice, > > I looked at the engine and the dizzy but all I > could read was 0 231 137 in the first row and a vw > logo with 111 905 in the next. I know you would need > the last letters to know what the thing is. I should > pull the dizzy out soon to have a good look. Will > report back then. > > I do remember that this dizzy came with a smaller > vacuum cannister when I had picked it from the > junkyard. The unit which came with the engine/car > was also a similar smaller one with a bigger vac > can. I do remember the part numbers were different. > I had reused the bigger can and binned the old dizzy > as it was too worn out. > > Why were the vac cans of different sizes?? Do > they work on different levels of vacuum?? Logic > would say the smaller can would 'kick in' with its > advance earlier than a bigger one. > > Will report back with an update soon. > > TIA > Asad > > Date: Fri, 29 Feb 2008 19:03:12 -0800> From: > [EMAIL PROTECTED]> To: [email protected]> > Subject: Re: [vintagvw] Dizzy for 40 horser> > The > 01 006 2-piece points sets are still available,> but > they cost over twice as much as the more-common 01> > 011 used on more "modern" distributors. Those > big-cap> units were infamous for developing excess > advance at> low speeds - it's been over 20 years > since I've seen> one that didn't suffer from this > problem. What's the> 10-digit Bosch number of the > one you're running now?> Odds are that it doesn't > get a strong enough vacuum> signal from this engine > to work right, but if you can> set it at 7.5-10° > initial and get 30° or more total> out of it by > ~3000RPM it's "good enough". If not, IMO> you'd be > better off with a 0 231 178 009> centrifugal-advance > unit than with the antique....and> tune-up parts for > those are easy to find.> > > --- asad ishaque > <[EMAIL PROTECTED]> wrote:> > > > > Volks,> > > > > > > I run a 40 horsy 61-2 vintage 1200 in my > daily> > driver 68 bug. The engine has a more > 'modern' VW> > dizzy currently, I guess a late > sixties unit with> > the smaller cap. I got my hands > on what may be the> > correct unit for the motor.Has > the number ZU/PAU 4R5> > on the nifty plate at the > side. Its one of those big> > cap dizzys.> > > > > Will I get any benefits if I run this particular> > > dizzy?? I think the performance of all the > different> > dizzys differs??> > > > I would need to > get a new cap, point n condenser> > to complete the > setup. The local VW shop has the> > last few NOS > caps on its shelf but advised me not to> > go for > the setup as the points are hard to find for> > this > unit.> > > > Any thoughts welcome.> > > > Asad> > > > > > ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ _______________________________________________ vintagvw site list [email protected] http://lists.sjsu.edu/mailman/listinfo/vintagvw
