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Mike9311
Joined: 14 Dec 2004
Posts: 1786
Location: Chicago-ish
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 Posted: Thu May 21, 2020 6:22 am Post subject: |
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| Cédric wrote: | The Swedish guy who built one had it in his 968 time attack car, with almost 1000hp, it worked after the strengthened the clamp between the transaxle shaft and gear box input shaft. I guess you will have less power than that 
For you other guys, this is a mad mans project, probably nr 205 on the list of improvements you should do on your car. There's so much other stuff to sort fist if you just want to go fast but it's cool, that's for sure |
 I saw that post on that car and it is wicked!
Yeah, not even close especially for this '82. Just looking for reliable 200+. Maybe my GTR will be up closer to 300-400 but 1000? seriously, that is amazing. Love the vid of that car
Agreed a madmans project just to lose weight. Even though it bugs me its low hanging weight but it presents itself that way and I have to take it.
Interesting you said it was his driveshaft clamp, which I could see that being weak at that level, not anything with the tube itself.
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1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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Cedric
Joined: 27 Aug 2004
Posts: 2721
Location: Sweden
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| Posted: Thu May 21, 2020 6:30 am Post subject: |
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It took some time for him to figure out the issue, it was driving the shaft forward making axial bearing on the crank wear out in no time. It got solved in the end though.
Sadly he is now leaving the 968 engine after a cracked block at the world time attack challenge in Australia last year. Now on its billet K series, but still gearbox in the rear
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1980 924 Turbo
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Mike9311
Joined: 14 Dec 2004
Posts: 1786
Location: Chicago-ish
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| Posted: Thu May 21, 2020 7:10 am Post subject: |
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Was that a billet block as well or am I mixing 968 engine builds (Elmer Racing)
I get it... at some point you want reliability
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1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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Cedric
Joined: 27 Aug 2004
Posts: 2721
Location: Sweden
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| Posted: Thu May 21, 2020 8:15 am Post subject: |
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No he ran a sleeved 968 block, but reinforced with bigger head bolts etc, alot of work on those engines. His spare one has been out for sale btw
They though about making a billet block, but opted out and went the K way due to the availability of fully working engine's. Keeping it together for a track car is way more challenging than flying down a dragstrip for a few seconds, they have had some challenges during the years .
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1980 924 Turbo
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Mike9311
Joined: 14 Dec 2004
Posts: 1786
Location: Chicago-ish
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| Posted: Fri Jun 12, 2020 7:44 am Post subject: |
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I have not one chassis that could handle the 1000Hp motor  sigh
Update, the alu torque tube is partially together and the small flange welded up. Almost ready...
Put the turbo on the balancing machine and took a baseline reading. It was obviously rebuilt and seemed decent balance wise. Installed the billet 2660 wheel and interestingly the balance improved. Not sure I want to mess with it further. Its crazy good. Turbo might just be going in the car this afternoon!
Also, just installed a upgraded door handle pull. I'll get a pic later. The process of installing is a PITA. Luckily the first setting was decent and the driver door opens nicely at a pull of the lever. No more yanking
Might be up the FB group already with a pic and a vid
_________________
1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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Mike9311
Joined: 14 Dec 2004
Posts: 1786
Location: Chicago-ish
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| Posted: Thu Dec 03, 2020 12:55 am Post subject: |
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Update.. waiting on some items out of Germany to finalize latest bearing carrier for the tube.
Tube is together finally and tacked up for final welding today. Once assembled will likely run it in before installing (Edit: Then the CS will get one too ... so much easier with G31)
Turns out turbo needed a new turbine. Will be swapping transmission since its out anyway. Brand new clutch going in that I have had on hand since last century. Script seats going in temporarily while sport seats get dealt with. Some interior work including replacement backseat panels. Innovate boost controller/AFR/Gauge getting installed in speaker pod along with VDO Boost gauge. Waste-gate is rebuilt with new diaphragm and guide. Some rear brake work completed. Still need to finalize fitment for the larger IC rad up front and get temp gauge for IC. New lightweight horns to replace stock units removed for IC Pump. There is probably more. Just can't think of it right now
_________________
1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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morghen
Joined: 21 Jan 2005
Posts: 9014
Location: Romania
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| Posted: Thu Dec 03, 2020 1:20 am Post subject: |
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 amazing stuff !
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Supercharger and EFI kits
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jacobroufa
Joined: 18 Nov 2016
Posts: 531
Location: Belvidere, IL
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| Posted: Fri Dec 04, 2020 5:29 am Post subject: |
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That is sweet, Mike. May have to have your help with the Weissach, we will see what Bart says...
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1980 Porsche 931
1981 Porsche 924 Weissach |
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Mike9311
Joined: 14 Dec 2004
Posts: 1786
Location: Chicago-ish
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| Posted: Thu Dec 17, 2020 1:21 am Post subject: |
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So, as the dust settles and with the crash tabs we added on the tube to be like stock, its a savings of -14lbs or -6.35Kg
The bearing carriers will likely add a 1lb or so back as well. A lot of work for that weight savings and to raise CM in the wrong direction. Too bad we can't take it from the roof. Still, the weight is coming off
I had predicted around -15lbs so pretty much on target. The one planned for the CS is a bit more radical but also shorter with the G31.
Still waiting on the 'express' shipment from Germany on an item we need for the carriers...sigh...
_________________
1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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Fasteddie313
Joined: 29 Sep 2013
Posts: 2596
Location: MI
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| Posted: Thu Dec 17, 2020 2:23 am Post subject: |
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What? You have a turbo balancing machine?
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80 Turbo - Slightly Modified |
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Mike9311
Joined: 14 Dec 2004
Posts: 1786
Location: Chicago-ish
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| Posted: Thu Dec 17, 2020 5:00 am Post subject: |
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Officially not a Turbo only balancing machine but balancing machines yes
We have been experimenting with the best way to balance but its doable for sure based on testing. Which is good because I currently have two turbos to balance with new wheels. I realized it was possible when we balanced these really small 50K rpm spindles.
On the '80 NA we balanced the camshaft as well as all the engine components. (which is what you are referring to I think)
We also have an IoT device that can detect vibration. I'm thinking we might strap in on the tube for fun.
_________________
1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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Mike9311
Joined: 14 Dec 2004
Posts: 1786
Location: Chicago-ish
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| Posted: Thu Dec 17, 2020 5:33 am Post subject: |
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Oh, I just realized the tube damper is also not going back into the aluminum torque tube. Another -6lbs
This is also why I want to keep an eye on the overall "vibes"
We shall see
_________________
1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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Mike9311
Joined: 14 Dec 2004
Posts: 1786
Location: Chicago-ish
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| Posted: Tue Jan 26, 2021 5:33 am Post subject: |
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So the parts we needed FINALLY arrived out of Germany. Super crazy how I can get some stuff fast from the other side of the planet but other stuff takes three+ months  
Next step for the torque tube finalization to commence!
_________________
1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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Mike9311
Joined: 14 Dec 2004
Posts: 1786
Location: Chicago-ish
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| Posted: Thu Mar 04, 2021 1:19 am Post subject: |
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If work doesn't overwhelm too much this week I am hoping to go to final assembly and test. Working on the last 5% of the bearing carrier details. This has become a hot project. 3 More tubes to build after this one
_________________
1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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Mike9311
Joined: 14 Dec 2004
Posts: 1786
Location: Chicago-ish
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| Posted: Tue Apr 06, 2021 12:24 am Post subject: |
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So the experimenting continues. In order to final assemble I needed the clutch fork prepped but can't stand the needle bearings for this type of use. Times are different and proven tech can be applied. At least now we can start popping things together.
_________________
1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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