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gegge
Joined: 27 Jul 2007
Posts: 1124
Location: Sweden
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 Posted: Thu Oct 07, 2010 7:01 am Post subject: |
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 That is short! How is it to shift? Hard to engage or easy to miss?
Please explain how you built it - I just love the short motion.
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Carl Fredrik Torkildsen
924 turbo -81 Carrera GT RESTOMOD
924 turbo -80 Dolomite De Luxe
924 -85 DP kit, BBS RS, M030 and tuned engine
924s -86 Black on black turbo with Fuchs
Last edited by gegge on Thu Oct 07, 2010 7:37 am; edited 1 time in total |
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gegge
Joined: 27 Jul 2007
Posts: 1124
Location: Sweden
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| Posted: Thu Oct 07, 2010 7:18 am Post subject: |
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| Rasta Monsta wrote: | | The interesting thing about the pics is that it looks like the change in geometry could be replicated by moving the upper pivot hole on the stock shift lever. |
Itīs been done before. Cost? $50 incl gearknob 
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Carl Fredrik Torkildsen
924 turbo -81 Carrera GT RESTOMOD
924 turbo -80 Dolomite De Luxe
924 -85 DP kit, BBS RS, M030 and tuned engine
924s -86 Black on black turbo with Fuchs |
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fiat22turbo
Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR
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| Posted: Thu Oct 07, 2010 8:02 am Post subject: |
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I was thinking, that one could potentially use a piece of solid steel rod (a little weight is a good thing for feel) and bore two holes large enough to pass two short pieces of steel tube through that can be welded in place.
The pieces of tube can then be machined to fit the stock bushings (or larger bearings/bushings)
Basically replicate the stock lever in steel round stock instead of flat stock.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
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924RACR
Joined: 29 Jul 2001
Posts: 8804
Location: Royal Oak, MI, USA
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| Posted: Thu Oct 07, 2010 10:39 am Post subject: |
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What can I say...
Every village needs an idiot. 
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype |
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Min
Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada
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| Posted: Thu Oct 07, 2010 1:44 pm Post subject: |
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(5.923-3.217)/5.923 = 0.45686 so, it gives a ~45 percent reduction in throw.
Min
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Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting. |
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Lizard
Joined: 03 Nov 2002
Posts: 9364
Location: Abbotsford BC. Canada
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| Posted: Thu Oct 07, 2010 1:53 pm Post subject: |
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| gegge wrote: |
That is short! How is it to shift? Hard to engage or easy to miss?
Please explain how you built it - I just love the short motion. |
It is great to shift, never miss a shift. But finding neutral is a real bugger as it goes from one gear to the next right away. And because of the reverse lockout it can be fun getting it into reverse.
As to how to build it. Well on the snailshell cars this will be possible.
But it will require substantial modifications to the shift linkage itself.
And again, for 99.9% of all drivers I would not recommend this shifter, especially on the street. Apparently I like torture though.
I had that shifter at a track day in spokane, and an instructor tried to drive my car. He was unable to, he could not find any gears or even back out of the paddock.
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3 928s, |
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Joes924Racer
Joined: 03 Nov 2002
Posts: 11964
Location: Oregon, Denver Colorado native!
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| Posted: Thu Oct 07, 2010 2:12 pm Post subject: |
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ha ha lol Lizard. You madee me laugh bout the instructor..
thats one trick piece you have. I like it.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo. |
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ideola
Joined: 01 Oct 2004
Posts: 15548
Location: Spring Lake MI
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| Posted: Thu Oct 07, 2010 2:16 pm Post subject: |
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FWIW, I got pretty far down the path in converting Lizard's 928 short shifter to the G31, but ultimately abandoned the idea because it is simply not bolt-on enough to be economically viable for such a finnicky and cheap clientele.  I managed to adapt one for one of my cars, but scrapped the idea because it ends up being such a royal PITA to install, not to mention trying to come up with a way to replicate the necessary changes to the shift rod without requiring a whole new assembly. Anybody that is DIY enough to make their own shift rod setup doesn't need an off-the-shelf lever.
What I like about the earlier iteration is that it is precisely that: off-the-shelf and direct bolt-in. So there you have it.
Now, you all need to buy one.
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erstwhile owner of just about every 924 variant ever made |
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Lizard
Joined: 03 Nov 2002
Posts: 9364
Location: Abbotsford BC. Canada
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| Posted: Thu Oct 07, 2010 2:18 pm Post subject: |
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Dan,
Will you be using the 928 shifter in one of your cars?
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3 928s, |
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fiat22turbo
Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR
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| Posted: Fri Oct 08, 2010 2:27 am Post subject: |
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| Lizard wrote: | This is absolutely the MOST reduction in throw that is possible without modifying the shifter linkage.
I made a short shifter for the 928, which is similar to the snailshell boxes, that eliminates the ball cup bushing and rod entirely. It has a 60-70% reduction in throw.
It would be possible to adapt that to the snailshell boxes.
However you would need to buy a 928 rear universal joint (it has adjustment there), and the shift rod which connects to the transmission. This may or may not need to be shortened or lengthened.
However this above shifter eliminates ALL play in the system, and it feels more like a gated shifter. But it has very little for/aft movement and most people dont think that they are in gear when they are.
I made one of these on my track 928, and I also used a stock audi shifter and made a 2/1 ratio lever system which attaches to the torque tube. My throw on that car from gear to gear (with a taller shifter so its closer to the wheel), is roughly 3/4". Remember that is from gear to gear. So going from 2nd to 3rd the motion is 3/4". I am the only person who can find neutral in that car. Because the moment you touch the shifter it instantly pops into the next gear.
However this shifter that Dan is making is an excellent product, and it is the best option for your average daily driver. The stock unit is more like rowing a boat. |
Sorry to hijack a bit, but have any pictures? In looking at the 928 linkage pictures online I don't see where there is a huge difference between the two solutions.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose) |
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Lizard
Joined: 03 Nov 2002
Posts: 9364
Location: Abbotsford BC. Canada
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| Posted: Fri Oct 08, 2010 4:49 pm Post subject: |
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The difference is that the 928 shifter linkage to the transmission is the bottom bar, 924/931 is the top. As well as the 928 shift rod, is a separate piece from the universal joint which connects to the transmission. The 924/931 this is an integral part to the shift linkage bar.
As to lengths or other differences I have no idea.
But with the 928 bar, there is an adjustment between the bar and the universal in the back. This allows you to adjust the resting position of the shift lever, as well as the side to side motion of it. Which is essential for the new style of shifter mechanism that I made.
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3 928s, |
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bnoon
Joined: 12 Oct 2009
Posts: 607
Location: West Des Moines, IA USA
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| Posted: Sat Oct 09, 2010 1:19 am Post subject: |
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| gegge wrote: | | Rasta Monsta wrote: | | The interesting thing about the pics is that it looks like the change in geometry could be replicated by moving the upper pivot hole on the stock shift lever. |
Itīs been done before. Cost? $50 incl gearknob
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Any tips as to where to get that knob? Seems like an 8 ball with the Porsche logo on it.
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'80 924 Turbo - SOLD!
1986 Porsche 944 Turbo - SOLD!
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Mike9311
Joined: 14 Dec 2004
Posts: 1678
Location: Chicago-ish
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| Posted: Sat Oct 09, 2010 2:55 am Post subject: |
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| ideola wrote: | | finnicky and cheap clientele. |
Awesome Dan When I read some of these threads I seriously wonder why you even want to serve us at all?!? There is always someone attacking someone. I can't even read some of these. They get me worked up.
Anyway, you will be getting an email/call from me soon to order some stuff to build a strong bottom end and heads for the 80 931 resurrection. I promise
It is a tough crowd around here
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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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ideola
Joined: 01 Oct 2004
Posts: 15548
Location: Spring Lake MI
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| Posted: Sat Oct 09, 2010 3:51 am Post subject: |
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| Lizard wrote: | Dan,
Will you be using the 928 shifter in one of your cars? |
It's in the 1980 Euro Shark that I sold earlier this week. Buyer is coming to pick it up this afternoon.
To answer the question about the difference between the 928 and 931 shifting arrangement, the work on similar principals, but the pivot points are exactly reversed as Lizard pointed out. I thought there might be a way to easily adapt the 931 shift rod by flipping it over and re-doing the pivot pin, but the way the coupler attaches at the back would have resulted in making the coupler too high and at the wrong angle for input selector shaft. The only alternative I could come up with would be to make a new shift rod...not hard to do for a one-off situation, but not at all viable cost-wise for a saleable product, nor for the "bolt-in" factor. I know how to do it, but from a product perspective, it's just not economically feasible, ESPECIALLY for the 924 crowd.
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erstwhile owner of just about every 924 variant ever made |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11723
Location: PacNW
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| Posted: Sat Oct 09, 2010 5:23 am Post subject: |
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Now, now, don't kick us around too much, even if we are cheap and finicky.
Perhaps the 911 crowd would be less aggravating?
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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924 FAQ (Technical)
