[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [New Search]
>>From: Curt Dilday <cdilday@mail.win.org> >>To: "'oofacts@earthlink.net'" <oofacts@earthlink.net> >>Subject: RE: [T3] Dual Carburetors >>Date: Thu, 13 Aug 1998 15:58:08 -0500 >>MIME-Version: 1.0 >>X-MIME-Autoconverted: from quoted-printable to 8bit by >>stork.prod.itd.earthlink.net id OAA02066 >>Status: U >> >>Engine #: U 5022570 (this is definite. I checked it three times) >>>What year is the car? Is the fan correct on it? Is it an automatic or >>>manual transmission? >> >>Distributor #. I finally managed to read the number under the left distrib >>clamp from under the car. Again, This is definite. >>Saw This: 0 231170 093 Above this number, not a Bosch #, but: JFU >>>That is a type 4 distributor, from a 74 1800 automatic bus. This >>>distributor has a total advance of probably 36 degrees. Fine for a type >>>4 motor but it will destroy a 1600. If it has a dual vacuum canister >>>(two hose connections), and the VW # is 021-905-205S, you should get a >>>different distributor. I've been trying various vacuum distributor >>>combinations in my 'back with Weber 34 ict's for some time, so far >>>nothing's worked as well as a plain old Bosch 009 with Compufire >>>ignition. The problem I've been running into is too much vacuum >>>resulting in too much advance, and it's unsteady at that. Plus it runs >>>about 100 degrees hotter with a vacuum distributor. I haven't tried a >>>late model beetle vac yet but that's next on the agenda when I can find >>>one. I expect that won't work either, but whatthehell. >> >>If you have any questions about the distrib. see the Distributor Questions >>thread on the link. Its all about me and my distributor, and my distributor >>is not stock. >>Sorry, I missed all that. You time the distributor by the distributor, >>not by the year of the engine. Muir's type 3 timing information is wrong >>and the Bentley contradicts itself. The trick is to ignore what the >>books say and time it for a total advance of 30 degrees at 3500rpm and >>let the idle fall where it will. To do that you need to decipher the >>timing marks on your fan and make new ones for 20 and 30 degrees. I did >>this by finding the 0 and 10 degree marks, cutting a piece of paper the >>same length as the space between the two marks, then leapfrogging the >>paper from 10 to 20 and making a mark with a dot of white paint, then >>doing it again to go to 30. Then you put your timing gun on, run up the >>motor till the distributor stops advancing, time it to the 30 mark and >>there you are. You can try this with the distributor you've got, I bet >>the initial timing falls somewhere near 0 if you have the vac advance >>connected. If it runs well it might be ok to keep it, but the advance >>curve will still be wrong and you'll probably run too hot as a result. >>Personally, I wouldn't keep it. >> >>Just tell me, what SHOULD I be idling at? >>850 rpm? >>>850-900 is about right for a manual tranny in neutral. Same for an >>>automatic, but that's with the transmission in drive, not neutral. >> >>Back to my "stories" >>Curt >> > > ------------------------------------------------------------------- List info at http://www.vwtype3.org/list or mailto:help@vwtype3.org