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jacobroufa
Joined: 18 Nov 2016
Posts: 529
Location: Belvidere, IL
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 Posted: Tue Mar 12, 2019 12:02 am Post subject: |
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| Such a clean engine bay for having CIS fuel injection still, and a turbocharger! Definitely setting some goal posts for the rest of us 931 owners!!! |
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2596
Location: MI
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| Posted: Tue Mar 12, 2019 1:49 am Post subject: |
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Oh man I must have missed this thread somehow.
Those winter wheels are sweet. So different..
That turbo should be much different than your old turbo.
You have dyno numbers with your old turbo don't you? It would be very interesting to see the change just with the new turbo on basically the same setup..
Does it spit flames or backfire with that open dump BOV?
Is it ricer loud PSSSTT when it blows off?
Are you planning on just muffling the sound of it somehow or plumbing it back into the intake between the compressor and AFM?
I like how you put it on the overboost switch spot but it looks like you had a nipple welded on there or something..
I think I might have the diagrams on pdf on how to make a Brian Leask style WUR somewhere if you want to make one yourself or have someone make one for you..
Don't go blowing her up before you get proper boost enrichment going!
With the bigger turbo if anything it should be safer, less likely to det, at the same boost level, and an IC, so I on't think you need to be too awfully rich to be safe and you have a wideband and knock warning thing don't you?
Looking good!
That thing should be darn fast on the top end now!
Wondering how much different the spool/lag really is with the 27..
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80 Turbo - Slightly Modified |
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jacobroufa
Joined: 18 Nov 2016
Posts: 529
Location: Belvidere, IL
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| Posted: Tue Mar 12, 2019 1:57 am Post subject: |
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| http://930wur.com for reference. I had not heard of it and a quick web search shows this page. Are there good resources around for the details of the particular modifications this guy has done? |
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Carrera RSR
Joined: 08 Jan 2010
Posts: 2309
Location: Somerset, UK
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| Posted: Tue Mar 12, 2019 2:06 am Post subject: |
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| jacobroufa wrote: | | http://930wur.com for reference. I had not heard of it and a quick web search shows this page. Are there good resources around for the details of the particular modifications this guy has done? |
Google it. Lots of 930 owner discussions on Rennlist etc. Its 4 way externally adjustable. Most who say they have 'adjustable' WUR is just the two way pin which only does cold + hot warm up pressure. You need the bottom modification to do the running pressure and boost enrichment. Theres also some info here when I did my rpm boost enrichment switch http://www.924board.org/viewtopic.php?t=42373
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
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Carrera RSR
Joined: 08 Jan 2010
Posts: 2309
Location: Somerset, UK
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| Posted: Tue Mar 12, 2019 2:10 am Post subject: |
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@FastEddie - I ran it first without a BOV. Too much rev hang. Not so nice to drive. Nice boost surge noises though. Fitted a dual port and adjustable BOV. One port goes to atmosphere, one I plumbed back into the pipe post AFM pre turbo. Any kind of % recirc pressure gives me rev hang. So its now 100% to atmosphere only.
No flames or backfiring as that usually only happens to EFI cars with MAF
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
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Carrera RSR
Joined: 08 Jan 2010
Posts: 2309
Location: Somerset, UK
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| Posted: Tue Mar 12, 2019 2:16 am Post subject: |
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Work in progress during the BOV set up
BOV mounting. Wanted the biggest intake possible @ 35mm
Drilled out the OEM 13mm intake to base of AFM and installed a 25mm tail.
Recirculating the boost does not work and gives me rev hang. Will be capping this off at the weekend. The boost will dump into the 25mm pipe previously planned for recirc in an effort to dumb down the pssst noise. It sounds like a truck letting off its air brakes!!
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
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Carrera RSR
Joined: 08 Jan 2010
Posts: 2309
Location: Somerset, UK
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| Posted: Tue Mar 12, 2019 2:31 am Post subject: |
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Datalog info and vids to follow ............
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2596
Location: MI
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| Posted: Tue Mar 12, 2019 5:13 am Post subject: |
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That is some darn nice aluminum work there!
I want a TIG bad..
I need to try dumping the bov to atmo.. I might like the sound. Mine sounds like you stepped on a duck, eeerrrrkkk..
Getting it adjusted right recirculating reduced my rev hang a whole lot from no bov, or too tight bov, but it still doesn't drop like an anchor like I would like it to..
I am getting a super itch to go mess with my car but their is like 6 feet deep snow in the way and no sign of it leaving soon.
Shoveled my shed door out twice this year and it is again up higher than the door handle so I haven't even bothered going in there for a while..
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80 Turbo - Slightly Modified |
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morghen
Joined: 21 Jan 2005
Posts: 8879
Location: Romania
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| Posted: Tue Mar 12, 2019 5:23 am Post subject: |
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Thats what you get for enjoying those V8s so much 
We have flowers sprouting here and i'm already running summer tires on the croc.
Dump to atmo for proper rpm drop.
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https://www.the924.com |
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Cedric
Joined: 27 Aug 2004
Posts: 2608
Location: Sweden
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| Posted: Tue Mar 12, 2019 6:19 am Post subject: |
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Hmm, in my setup its extremely quick on an of boost. If i do a quick on/off throttle blip the boost drops and goes back up almost instantly without any hickups. I start to wonder if i were just lucky getting it righ on the first shot when i read about the fiddling you guys are needing to do.
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1980 924 Turbo
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Carrera RSR
Joined: 08 Jan 2010
Posts: 2309
Location: Somerset, UK
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| Posted: Mon Mar 25, 2019 9:35 pm Post subject: |
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| Fasteddie313 wrote: | I am getting a super itch to go mess with my car but their is like 6 feet deep snow in the way and no sign of it leaving soon.
Shoveled my shed door out twice this year and it is again up higher than the door handle so I haven't even bothered going in there for a while.. |
| morghen wrote: | Thats what you get for enjoying those V8s so much
We have flowers sprouting here and i'm already running summer tires on the croc.
Dump to atmo for proper rpm drop. |
Mowing the lawns, flowers are out, blossom on the trees.
Roof is out, windows are down and sunglasses on all weekend driving the 924. Spring is properly here in UK 
_________________
1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
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Goldwolf
Joined: 25 Jun 2017
Posts: 264
Location: Athens,GA
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| Posted: Mon Mar 25, 2019 11:05 pm Post subject: |
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Carrera RSR.
Can you get me a straight on pic of the 924 turbo script on the pipe?
I've been looking for one for a design.
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1981 Weissach Edition #179 |
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Carrera RSR
Joined: 08 Jan 2010
Posts: 2309
Location: Somerset, UK
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| Posted: Mon Mar 25, 2019 11:25 pm Post subject: |
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| Goldwolf wrote: | Carrera RSR.
Can you get me a straight on pic of the 924 turbo script on the pipe?
I've been looking for one for a design. |
Good image on the previous page of this thread. Almost straight on
_________________
1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
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Goldwolf
Joined: 25 Jun 2017
Posts: 264
Location: Athens,GA
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| Posted: Tue Mar 26, 2019 3:10 am Post subject: |
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thanks! missed the pic
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1981 Weissach Edition #179 |
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Carrera RSR
Joined: 08 Jan 2010
Posts: 2309
Location: Somerset, UK
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| Posted: Tue Jun 18, 2019 8:07 am Post subject: |
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8x16 Wintercults all round
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
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