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On 23 Feb 2001, at 14:09, Douglas_Brashear@amsinc.com wrote: > I have a '73 Fastback (manual transmission) that wasn't running so > well, and I just spent like $300 at a local shop to have them tune it > up, trouble shoot a bunch of things, and get it running. It is a > totally stock engine aside from a header exhaust. Now it runs about > at about 80%, I'd say...the engine only has 42K miles on it (car sat a > while before I bought it), has great compression (130 PSI in all > cylinders even when cold), and sits inside a car that should last many > more years. Sounds like you got a good one. I wish I were closer to you. Working together we probably could have gotten you to a better state for less money. The biggest problem with the FI is just finding someone who understands it and is honestly interested in helping you. It sounds like you have a great car, so I hope you stick with this effort for awhile. I think I have one list member coming here from NYC sometime early this summer. Want to make it a caravan? > Basically, if I could get the FI running 100% then I'd stick with it. > Since the remaining problems involve some surging at idle, and slight > surging/lack of power at speed, I'm thinking I may have a leaky > injector. I may consider new injectors in the future to see if that > helps. It is probably not an injector problem, but until I hear more I'm not sure what to suggest. Have you measured the charging system regulating voltage? > Anyway, back to the question...I've seen Weber Type III carb kits > available, but have no idea what's involved in converting the engine > to carbs. > > - Can you fit a mechanical pump to the stock case? Or do you have to > go with a Facet electric fuel pumps? - Are there any wires already in > the rear harness that must be connected to the carbs? Probably not if > they don't have electric chokes... - How difficult is the tuning > procedure? Are there any special tools than can help? - Do you need a > special throttle cable (perhaps longer than the stock one)? - What do > you do with all the breather hoses that lead into the stock air filter > (from the heads, from the case, etc.)? - What source of carbs/parts do > people recommend? I have heard of cases that wouldn't take a mech pump, but I've never seen one. You can run any wires you need from the coil. Tuning is a significant learning curve and you can't count on the carbs being jetted correctly for your car as they come out of the box. Parts are available, but probably only by mail order. They are also getting harder to find every year. Special tools: Uni-Syn carb syncronizer. Most people just ignore the hoses that are left over. Not a particularly responsible idea since these are emissions related, but there is not much else you can do. You'll probably need a different cable, or perhaps the kit will come with an extender. Carb linkages are a big deal and I hear that the quality can vary a lot. > One con I've heard of: > > - The carbs have no choke, so starting the engine in cold conditions > (i.e. 0 degrees F) can be a pain. - what else? I don't think the Weber carbs have any vacuum or choke provisions. > The pros are obvious: > > - Somewhat easier to maintain than FI, and easier to troubleshoot - > Parts readily available - Less to go wrong - Probably better mileage > than I'm getting right now (about 22 MPG) - Increased power - what > else? I don't think they're any easier to maintain, but there are a lot of people out there who at least think they understand carbs better and can troubleshoot them more easily. Both systems have significant learning curves. Increased mileage is likely, but at the cost of increased emissions. Increased power is very probable. There are clearly people on this list who have had both positive and negative experiences with both systems. - Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ------------------------------------------------------------------- Unsubscribe? mailto:type3-request@vwtype3.org, Subject: unsubscribe