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henrymfisher's Avatar
 
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FS - 930 Ring & Pinion - 8:41

SOLD

I have a Schema (German) 8:41 ring and pinion for a 930 gearbox. Great option for DE and Club Sport racing as well as any guy looking to shorten those tall 930 gearboxes.
$700.00 plus CONUSA shipping.



email me please - henrymfisher@comcast.net

Thanks,
Henry

Last edited by henrymfisher; 11-19-2013 at 08:14 AM..
Old 10-23-2013, 01:24 PM
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Contact this guy: msroadrace on eBay

He bought my German 8:41 and resold it for big $$. He's probably interested... Dave is his name, email: msroadrace@msroadrace.com
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LIVN80S - - Red '79 Porsche 930 Steel Slant Nose Conversion [in 1987] w. 46k miles 3.3L; 964 Cams; K27HF @ 1.0 BAR, with Garrettson Intercooler; Rarly Zork; CIS Flowtech Fuel Head & BL-WUR.
Old 10-23-2013, 01:42 PM
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gearhead
 
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Schema is Italian, not German.

It is a decent part but the buyer should be aware that it will be noisy. Not factory quiet with those ones.
Old 10-23-2013, 05:53 PM
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I run an 8:37 R&P with a short second and third gear set. It's not
at all noisy because you can't hear it over the Zork.

Cole
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Cole - 80 930 "The Old Sled"
Mods: TurboKraft Custom IC, 934 Headers, GSX 61, Zork, Port Work, SC Cams, Air Mod Fuel Dist Relocated, Water Meth Injection, BL WUR, MSD 6530, Greddy EBC, Synapse Bov, Short 2nd & 3rd with 8:37 R&P, Wevo Shifter, Coupling, and Mounts, MTX-L SSI-4, Big Brakes, Rebel Coilovers, Bilstein Sports.
Old 10-23-2013, 06:59 PM
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Quote:
Originally Posted by cole930 View Post
I run an 8:37 R&P with a short second and third gear set. It's not
at all noisy because you can't hear it over the Zork.

Cole
LOL!!! But even a zork can't beat my tranny right behind my ears and no sound insulation

Maybe I should be part of a TV show as I can tell you which gear is in only by sound
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Roland

930 Turbo '81 Too many modifications to list
Old 10-24-2013, 01:07 AM
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Roland:

That's a great one !!!!
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Cole - 80 930 "The Old Sled"
Mods: TurboKraft Custom IC, 934 Headers, GSX 61, Zork, Port Work, SC Cams, Air Mod Fuel Dist Relocated, Water Meth Injection, BL WUR, MSD 6530, Greddy EBC, Synapse Bov, Short 2nd & 3rd with 8:37 R&P, Wevo Shifter, Coupling, and Mounts, MTX-L SSI-4, Big Brakes, Rebel Coilovers, Bilstein Sports.
Old 10-24-2013, 03:06 AM
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Quote:
Originally Posted by henrymfisher View Post
I have a Schema (German) 8:41 ring and pinion for a 930 gearbox. Great option for DE and Club Sport racing as well as any guy looking to shorten those tall 930 gearboxes.
$700.00 plus CONUSA shipping.
Henry,
All that time you spent looking for one and now you're selling it? Too short of gearing for you?

All,
True, the R&P is a little more noisy than the standard R&P, but still quieter than the cooling fan and turbocharger.
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Dave
'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P

Last edited by WERK I; 10-26-2013 at 05:23 AM..
Old 10-25-2013, 05:31 AM
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gearhead
 
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I only mention the noise because being in the gear business I have heard a lot of guys complain about it over the years. Most of us would think gear whine is an awesome sound, but a few months back I had a customer get really bent out of shape when his new R&P wasn't factory quiet.

Considering my brand new ones run $2800, at 1/4 the price this one is a total steal. I don't think it will be on the market long.
Old 10-25-2013, 07:41 AM
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Yep, short, decided togo back to the stock 9:36 and bought all new gears in the ratios i want.

Henry
Old 10-25-2013, 04:01 PM
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Thanks matt. Hopefully someone will take this off of my hands soon.
Old 10-25-2013, 04:05 PM
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Perhaps Matt could clear this up for me. I had thought that the lower ratio gear sets were not as strong as the factory set due to the spacing and number of teeth. I had considered a lower ratio however at 500+ bhp the car seems to,i guess "grow" into the tall stock final drive. My car has the factory LSD and gearing. It has run 11.3 sec quarter mile and is as quiet as a mouse.
Old 10-26-2013, 04:58 AM
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Quote:
Originally Posted by Andy930 View Post
Perhaps Matt could clear this up for me. I had thought that the lower ratio gear sets were not as strong as the factory set due to the spacing and number of teeth. I had considered a lower ratio however at 500+ bhp the car seems to,i guess "grow" into the tall stock final drive. My car has the factory LSD and gearing. It has run 11.3 sec quarter mile and is as quiet as a mouse.
I think we have to be careful here when we say "factory". Were the 930 R&P's factory forgings and machinings? Or were they factory spec, OEM pieces just as Mahle was the OEM supplier for pistons and cylinders?
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Dave
'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P
Old 10-26-2013, 05:21 AM
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Hi Werk! what i'm refering to is the original standard ring and pinion that would have been fitted at the time the car was brand new, as it was on the showroom floor. From my testing and development at the drag strip,the stock setup has been unbreakable... so far! What i was unsure about was the strength of the shorter gear sets,and indeed the need to select 4th gear before passing the quarter mile,thus meaning time lost changing gear Vs the maybe the benefit of getting the car up to speed sooner..
Old 10-26-2013, 05:54 AM
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Hey Andy,
Have you run into troubles with backlash with this R&P? I've got a little backlash right now I know will necessitate a transmission refresh, eventually. Only 77K on the odometer and as far as I know, no track time on the car.

Henry,
Sorry for taking this thread so far off topic. Wish I knew if I need a R&P replacement set RIGHT NOW. That is a very good deal you're offering.
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Dave
'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P
Old 10-26-2013, 08:06 AM
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gearhead
 
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Andy,
You need not worry about the strength of the shorter ring and pinion set. Keep in mind that the factory originally produced the 8:41 for the 935 racecars, which were making 2,3 and sometimes 4 times as much power as their showroom brethren.

That said, not all brands are created equal. Schema is on the lower end of the spectrum behind the likes of Porsche themselves, Andial and Ricardo. Doesn't mean I am calling it junk though. RUF contracted Schema to do a couple of runs of these units over the years, and RUF wouldn't put their name to junk.
Old 10-27-2013, 08:30 PM
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Thank you Matt. With this R&P and a stock ratio 4speed i wonder what the speed in each gear would be at 7000rpm... Interesting stuff. Werk i have had no problems with backlash. I agree this is a great price! Cheers guys
Old 10-28-2013, 04:23 AM
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Andy,
Speed in gears can be found in the third edition of Bruce Anderson's book, "Porsche 911 Performance Handbook", page 275.
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Dave
'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P
Old 10-28-2013, 03:58 PM
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Henry,
How much work is involved in replacing the r&p? Is this something I can do without special or Porsche specific tools? Any light you can shed would be appreciated.
Regards,
Tom Slivan
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82 930 Pearl White 3.3 964 cams, K27 HF, Kokeln, fuel enriched, IA fuel head mod, wur mod, crankfire, 2X plug, Aase worked heads. 1bar, GHL, zork, 23/33 bars, low, loud
Old 10-30-2013, 06:48 PM
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Tom,
Installing a R&P in any vehicle should left to an expert. Some very precise work is needed to ensure proper pinion depth, backlash, pinion/carrier preload, etc. However, if you can rebuild a Porsche engine, properly, there's no reason a novice couldn't do it. Patience is a virtue.
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Dave
'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P
Old 10-31-2013, 05:01 AM
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Thanks Dave, exactly what I was looking for. In other words it likely means Id have transmission parts sprayed around my kitchen counter well into 2014. Still intriguing nonetheless... It seems we run a similar setup and I see you run this on your car, what is your experience with this change in R&P?
Regards,
Tom
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82 930 Pearl White 3.3 964 cams, K27 HF, Kokeln, fuel enriched, IA fuel head mod, wur mod, crankfire, 2X plug, Aase worked heads. 1bar, GHL, zork, 23/33 bars, low, loud

Last edited by slyguy; 10-31-2013 at 05:41 AM..
Old 10-31-2013, 05:37 AM
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