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WUR spare

Is the Bosch WUR on the 930 specific to the 930? I notice that there are many Bosch WURs for sale on eBay - they all look the same externally, but I realize they may be different internally. I am looking for a spare to send off to one of the shops that perform the adjustability modifications. I want to do some A/B testing with my existing unit and an AFR gauge.

Thanks.

Old 04-25-2012, 05:01 AM
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Yep, they're specific to the turbo because they have a port to receive a boost signal and enrichen the mixture accordingly. Standard 911 WUR's won't work.

All WUR's start with the number sequence 0 438 140 ???. The final three digits differ based on the year. I think these numbers represent all the turbo WUR's up to the 90's: 050, 089, 112, 153, 160, 164.
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Old 04-25-2012, 07:57 AM
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thanks Mark.
Old 04-25-2012, 09:10 AM
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It actually goes further than that. The OEM settings for each part number are specific for the requirements of the engine and fuel system for that year and configuration (JAP,US,ROW,CA). There are about a half dozen different WUR part numbers for the 930.
If you want to make it adjustable the part number / specs no longer matter as much.
One caveat, the 3.0L WUR's and the early -054 unit cannot easily be made adjustable.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 04-25-2012, 01:20 PM
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Quote:
Originally Posted by RarlyL8 View Post
It actually goes further than that. The OEM settings for each part number are specific for the requirements of the engine and fuel system for that year and configuration (JAP,US,ROW,CA). There are about a half dozen different WUR part numbers for the 930.
If you want to make it adjustable the part number / specs no longer matter as much.
One caveat, the 3.0L WUR's and the early -054 unit cannot easily be made adjustable.
Brian would know this level of detail, of course, since he's in the business! I'm trying to remember, but I think stock for my '87 is the 153, but I'm actually now using a Leask modified 112 which works fine. FWIW.
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Old 04-26-2012, 07:14 PM
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The old Saab 900 turbo had CIS injection. If you could still find one in a you pull it salvage yard for 20 bucks it might be worth buying it to see if it could work after being made adjustable.

..it's just a lame random thought but at least those cars had a hood that kept it dry when it rained or during car washes so it would probably be in good shape.

Old 04-26-2012, 07:56 PM
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