Warm-Up Regulator... one better than another?

I’m going to order up a new Warm-Up Regulator for my 85 930 Turbo today and I wanted to ask the following question:

Where the WUR’s interchangeable throughout the model years? Is one version better than another? If so, what’s the best WUR to buy and it’s part number?

Thanks

I've heard a lot of people talk about using CIS components from other cars, (even non-Porsches ), but I wouldn't do it. WUR's have specific settings for cold and warm control pressures, and also heater coil resistance that are designed to work with the other CIS components. I'd stick with your original part number.

I have a parts spec book that has a parts diagram for an 85 turbo like yours, but it was very different (simpler) than the diagram you posted earlier. I can give you the part number off of it.

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Bill Krause
'79 911SC Euro

I would recommend using what Porsche installed in the creation phase. Porsche had all of the WURs to choose from and chose the one they did for a reason.

The WURs are made by Bosch, and most of the euro cars from the mid '70s to the mid-'80s employed the Bosche CIS. There are a lot of WURs in the yards cheap, and I have found that there are only four different WUR cases. The other piece that needs to be checked is the heating element, 18ohm - 22 ohm.

The rest of the parts are interchangable if it's the same case.

I don't recommend getting away from what Porsche did. I just wanted to present options. If you find a bad part inside a WUR during a cleaning process, or what ever, your only option IS NOT to buy a new one for $280.00. Hit a bone yard and you might strike it rich.

Once again Porsche and Bosch did invest a lot of money and time in developing their system to work as well as it does, and I would stick to it.

For what it's worth...

[This message has been edited by GT911 (edited 04-09-2001).]

possibly with your highly modified engine, you may never get it to run well during warmup. the rule of hotrodding is you always have to give up something to get something. if you get it pretty close, you may have to put up with slight wierdness.

I have a warm up regulator from a 1977 930 if thats the same I can sell you this one cheap, as I replaced it on mine, and then found the fault was elsewhere, Its guaranteed to be working correctly email me if interested ok have the Bosch part number also to cross reference

All of the warm up regulators can be adjusted easily by opening them up and using a small hammer to knock the pin back . They can also be easily adjusted externally if you install a threaded rod and locknut arrangement. The whole procedure is outlined in an early issue of "Up-Fixen" i'll look it up when I get home. When I still had cis and cis trouble I found it easiest to take it apart and use the hammer. I got my times (for the adjustments)under 10 min with this method.

Some have a different number of vacuum ports. They are specific to model year. My 79 SC had a WUR replacement and the parts guy gave me one that had one digit different. Needless to say it did not work.

Once I go the right one the problem went away. Mine had a WUR that was specific to that one model year only. Of course it was 20% higher in price than the others.

The plans for an adjustable wur are in vol VII of 'Up-Fixen'. originally in Oct 85 issue of Pano. If its a real emergency I can scan it.