924Board.org

McGyver · Posted: Tue Feb 24, 2009 7:59 pm Post subject: 931 Gearbox in 924

Hello!

My question:

How to put "dogleg" snailshell 931 gearbox (31010XXXX) to standard 924.
What need to be changed? I don't want 16Y (1979 - 924) Gearbox only G31(931 Turbo)!!

Thanks for any info
_________________
931 82' - 5000km after full engine rebuild

SOLD: 924 81' N/A- with turbo gearbox "dogleg" - great but mysterious car

www.mauser98k.internetdsl.pl - if someone like german rifles (English version avalible)

morghen · Joined: 21 Jan 2005 Posts: 9095 Location: Romania

The tostion bar carrier....basicaly...all the rear suspension if you dont feel like removing 20+ year old big rusty bolts...putting them back and getting a full alignment....and...all the linkage from the cabin to the gearbox...oh and the torque tube.
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McGyver · Posted: Tue Feb 24, 2009 11:42 pm Post subject:

What about clutch? standard 924 will fit?
_________________
931 82' - 5000km after full engine rebuild

SOLD: 924 81' N/A- with turbo gearbox "dogleg" - great but mysterious car

www.mauser98k.internetdsl.pl - if someone like german rifles (English version avalible)

Rich H · Posted: Wed Feb 25, 2009 12:44 am Post subject:

Why bother?

Dog leg boxes with good synchros are worth $$$ doglegs with knackered synchros are crap? Audi boxes are cheap and plentiful.
_________________
1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec

morghen · Joined: 21 Jan 2005 Posts: 9095 Location: Romania

oh...right..clutch...flywheel(if you want to keep things OEM)
bellhousing...starter...clutch master/slave cyl...clutch pedal..

i guess its not worth it

plus..your car will be very slow as the G31 has tall gears.
_________________
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McGyver · Posted: Wed Feb 25, 2009 6:02 pm Post subject:

I ask just becouse i bought two years ago 924 -1981 with mounted 931 snailshell gearbox, with cylinder block from 79' 931 Turbo! And I still don't know how it could be made all together.
Just look here:
http://www.924board.org/viewtopic.php?t=28426

Or just pictures of engine and transmission:
http://profile.imageshack.us/user/misiek26/

Thats most important serial numbers from my car:
VIN *WPOZZZ92ZBN403811* - 1981 924
Engine serial number * 31 01 08 69* - 1979 931
Gearbox serial number: 31/01/00183 - 1979 931

I think I have normal 924 clutch? but how it could work with 931 central tube? (or 931 drive shaft?) - i'm not sure is it good terminology in english :/ Just see the photos above for details...
_________________
931 82' - 5000km after full engine rebuild

SOLD: 924 81' N/A- with turbo gearbox "dogleg" - great but mysterious car

www.mauser98k.internetdsl.pl - if someone like german rifles (English version avalible)

morghen · Joined: 21 Jan 2005 Posts: 9095 Location: Romania

how many gears does your car have? i'm asking how many gears did you put it into and driven it into...not how many the shifting knob says it has.

this looks like an early 4speed snailshell combined with a late engine in a late body but....

question: did the car have a flapping(same color of the car) fuel tank cap door?

some clarifications:

1. the 931 engine block is identical to the 924...you can tell that the block was used in a 931 if its number starts with 31xxxxxx and if there are no XK/XJ letters there.
2. you have a normal cable operated clutch.
3. you have a 931 hood.

It is possible that a 79 931 was used as a donor car and the snailshell was modified or the couplers were modified.

It is also possible that somebody swapped the VIN from the 924 onto the 931 with a dead engine/cyl head.

NOTE: that is one strange looking cy head cover
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McGyver · Posted: Wed Feb 25, 2009 9:57 pm Post subject:

I have 5 gears + reverse

but i really rare use 5-th gear

after 120km/h
Normally I drive on 3-rd or 4-th gear

There wasn't something like 4 speed snailshell

Only 5 gears snailshell was mounted in early 78-79 924 or special modificated in 931 from 78. There are identical from outside - only possible identification is serial number on it. Mine have 310100183 - so it should be from 931 Turbo from 1979 year.
Engine Cylinder block have 31010869 number so it's from 931 Turbo from 1979 year.
I bought this car with this parts mounted so i don't have any information when and where someone do this modifications.
Car was brought to Poland in 1993 and i buy it in 2007. What was ealier - who knows?...

Now I'm trying to know what is what and why

For example Intake manifold - looks like from 1981 - but have stamp "11 79" so... i don't understand that

My cylinder head has part number 047 103 373 - I can't find it in PET - why? The same is with snailshell part number 477 301 101 A and gearbox housing 477 301 102 AA - both not exist in any PET?

K-jetronic looks like from 1979 - especially fuel lines are old type (before 1979)
OK 1979 engine - and gearbox

but why K-jet from normal 924 (79') and intake looks like 1981 or later? How this works all toogether?
Clutch Housing looks like from normal 924 - I don't check what is inside yet... but i'll do it soon.

I think it could be possible to swap Clutch from 931 and put it in to 924 Clutch housing... I have to check my pressure plate - if it's from 931 - that's say it's really possible

if not... next question, how it works with 25mm "central tube"
Any suggestions what is going on here?
_________________
931 82' - 5000km after full engine rebuild

SOLD: 924 81' N/A- with turbo gearbox "dogleg" - great but mysterious car

www.mauser98k.internetdsl.pl - if someone like german rifles (English version avalible)

RC · Joined: 25 Mar 2007 Posts: 2637 Location: Australia

McGyver · Posted: Wed Feb 25, 2009 11:41 pm Post subject:

I found this about cylinder head:
http://www.924board.org/viewtopic.php?t=930&sid=13ff0f3e616fd4ec5ba96bdbd3720855
http://cgi.ebay.pl/Audi-80-100-C1-C2-4-Zylinder-Motor-Zylinderkopf_W0QQcmdZViewItemQQitemZ130285877261
http://www.allegro.pl/item490607398_glowica_audi_vw_lt_porsche_2_0_b.html
http://forums.roadfly.com/forums/porsche/porsche_944_924_968/2493637-1.html
http://www.924board.org/viewtopic.php?p=20259&sid=74bb14f4e5b63c0628d8c422ff0c31a1

I don't know about what is inside engine - what pistons - I never check. Engine runs great but the fastest i go in this car was something about 160km/h on 5-th gear. I was afraid go faster

I have broken suspension

in really horrible shape. Now everything is fixed, but i don't have place to test speed

I try to find something more about this engine... even today i look for some more infos.
_________________
931 82' - 5000km after full engine rebuild

SOLD: 924 81' N/A- with turbo gearbox "dogleg" - great but mysterious car

www.mauser98k.internetdsl.pl - if someone like german rifles (English version avalible)

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

If you have a five speed snailshell, it is most likely that the clutch configuration was moved over from a 931 donor as well, which would include the clutch master, clutch slave, possibly the brake master (to accommodate the hydraulic line to the clutch cylinders), the bell housing (to accommodate the clutch slave), and a 931 or 944 starter. Probably the quickest way to tell is to see if your brake master cylinder has a blue line or hydraulic line going to a clutch master cylinder, which would be situated just under the brake booster (that is, assuming you have a LHD car...if it's RHD, the clutch master will obviously be on the other side, and where it would be specifically is anyone's guess). The other way to tell is to crawl under the car and see if the starter is visible on the LHS of the bell housing.

If it doesn't have any of these items, and still has a cable operated clutch, then whoever did the conversion must have found a suitable clutch setup, (possibly a Bronco II disc???) that will work with the larger input shaft and torque tube from the 931.
_________________
erstwhile owner of just about every 924 variant ever made

McGyver · Posted: Thu Feb 26, 2009 8:46 am Post subject:

I have LHD car

Tooday i found part number on my oil pan: "047 103 603 B" - it suggest it is from 924 Turbo... like cylinder block.

Clutch looks like normal 924 clutch - check on Photos
I found "TYP MF 215" typed on Pressure plate

Someone make hole in central tube - i don't know why? just check on photos

maybe that's why normal clutch work with 931 snailshell?

FRESH PHOTOS:

Any suggestions? questions? need more photos?

_________________
931 82' - 5000km after full engine rebuild

SOLD: 924 81' N/A- with turbo gearbox "dogleg" - great but mysterious car

www.mauser98k.internetdsl.pl - if someone like german rifles (English version avalible)

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

Look, it's pretty simple. If you have a cable activated clutch, then they did one of two things. They either found a manual clutch setup that would work with the larger driveshaft, or they modified the drive shaft on one end or the other to convert from 19mm to 25mm. Either way, photos of part numbers aren't going to help. They only way you'll know for sure is to take the clutch apart.
_________________
erstwhile owner of just about every 924 variant ever made

McGyver · Posted: Fri Feb 27, 2009 5:48 pm Post subject:

Is it something like this in standard 924 Oil Pan?

_________________
931 82' - 5000km after full engine rebuild

SOLD: 924 81' N/A- with turbo gearbox "dogleg" - great but mysterious car

www.mauser98k.internetdsl.pl - if someone like german rifles (English version avalible)

McGyver · Posted: Mon Mar 02, 2009 4:19 pm Post subject:

A little closer look:

There schould be hole...
_________________
931 82' - 5000km after full engine rebuild

SOLD: 924 81' N/A- with turbo gearbox "dogleg" - great but mysterious car

www.mauser98k.internetdsl.pl - if someone like german rifles (English version avalible)