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Chain fence eating turbo
 
Join Date: Dec 2008
Location: Austin, TX
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Quote:
Originally Posted by Tug68 View Post
I'll find out price tom. Tippy
I'm not actively looking, just curious.

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Cory - turbo'd '87 C3.2 Guards/Blk, 3.4, 7.5:1 CR P & C's, soon to be 993SS cams and GSXR 750 ITB's fed by 964 intake, Borg-Warner S366 turbo @ 1.4 bar, Treadstone full bay IC, TiAL F46 WG, HKS 1 1/2" BOV, twin 044 pumps, MegaSquirt 2 (v3.57 board) w/EDIS, Tramont wheels (285's rr, 225's frt), Big Reds frt, 993 rr., tower brace, MOMO wheel
Old 11-24-2014, 07:07 PM
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Quote:
Originally Posted by porsche 930twin View Post
Totle where did you get the parts from to shorten the transmission... also what power would you be making with your combination... I am also looking at swapping out my camshafts and going for the GT2 grind did you experience any issues with this combo
I bought pedal, linkage and hydraulic tubes from a dismantler of a 88 911. Master and slave cylinder I bought from this host.
Had a new side plate from CMS installed.

I'm making 505hp/635 Nm to the wheels. Great setup.

See here that Chris often install a turbo 5th gear, That would be my next upgrade
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Trond R.
1979 930: Garret GT35r turbo, EFI, carerra intake, Link EMS, custom GT2 cams, 98mm JE P/C, 964 crank (stroker), custom valves & ported (XtremeCylinderHeads) etc..etc..
1972 914-6 GT replica project
1986 944 Turbo
Old 11-24-2014, 09:45 PM
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Ok no problem. If I had to guess if say 10k???
Old 11-25-2014, 04:14 AM
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gearhead
 
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Hi Chris I am in Melbourne Australia so it would be a bit hard to send trans over to you ... can I buy the parts and have it done locally I have a great Porsche technician here
It's largely machine work. Though since the gearbox comes all the way apart to shorten the mainshaft it is a good time to refresh synchros and anything else showing wear.

And just a little information to add. A G50 na gearbox has gears that are just as strong as the turbo gears in a 50/50 or 50/52. The ratios are just different. The place where the turbo gearbox is stronger is the ring and pinion.
Old 11-25-2014, 05:40 AM
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While not directly applicable as my project is not a Turbo and is a 6 speed, here is a link....the shortening process described by various posters in this thread is good advice, but hopefully you can glean some further knowledge by my experience in shortening and fitting.....

http://forums.pelicanparts.com/porsche-911-technical-forum/185692-fitting-6-speed-g50-89-carrera-new-post.html

Dennis
Old 11-25-2014, 06:20 AM
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Chain fence eating turbo
 
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Quote:
And just a little information to add. A G50 na gearbox has gears that are just as strong as the turbo gears in a 50/50 or 50/52. The ratios are just different. The place where the turbo gearbox is stronger is the ring and pinion.
Hello Matt, how much power can a G50-01 take with a 993 diff cover?

I plan on using slicks at the drag strip with boost off the line.

It'll be a one or two time thing, not regularly.
Old 11-25-2014, 06:30 AM
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gearhead
 
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Quote:
Originally Posted by Tippy View Post
Hello Matt, how much power can a G50-01 take with a 993 diff cover?

I plan on using slicks at the drag strip with boost off the line.

It'll be a one or two time thing, not regularly.
After Eddie Bello blew up his uber expensive 50-50 he went over to using the 50-01. Strong enough for you?
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Old 11-25-2014, 06:47 AM
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Brando
 
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Quote:

Quote de Tippy



Hello Matt, how much power can a G50-01 take with a 993 diff cover?



I plan on using slicks at the drag strip with boost off the line.



It'll be a one or two time thing, not regularly.

After Eddie Bello blew up his uber expensive 50-50 he went over to using the 50-01. Strong enough for you?
Haha!! That'll do
Old 11-25-2014, 07:38 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #28 (permalink)
Chain fence eating turbo
 
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Quote:

Quote de Tippy



Hello Matt, how much power can a G50-01 take with a 993 diff cover?



I plan on using slicks at the drag strip with boost off the line.



It'll be a one or two time thing, not regularly.

After Eddie Bello blew up his uber expensive 50-50 he went over to using the 50-01. Strong enough for you?
That answers that!

Thanks
Old 11-25-2014, 07:50 AM
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4 speed to G50

Thanks all for input even tough I am getting a little confused... please correct me if I am wrong... I need to machine the front of the bellhousing and input shaft ... does this foul the clutch and starter setup?... does anyone have measurements or diagrams ... I have recently had transmission rebuilt ...
Old 11-25-2014, 02:57 PM
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You should talk to chris at turbokraft or someone at patrick motorsport about the process. It I believe is 19mm removed but I could be wrong from both the housing and from the shaft. The shaft needs to be removed from the gearbox (disassembled for this process) which might be painful after a rebuild going inside and doing lots of work again on a fresh assembly. Perhaps they can instruct you to the point you can commission someone locally to do the procedure?
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Old 11-25-2014, 03:09 PM
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A different clutch goes in after machining the bell housing that doesn't have the deep pressure plate a 78-88 transaxle uses.
Old 11-25-2014, 03:16 PM
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Yes, you will have to use a 75-77 turbo pressure plate with a G50 diaphragm
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Trond R.
1979 930: Garret GT35r turbo, EFI, carerra intake, Link EMS, custom GT2 cams, 98mm JE P/C, 964 crank (stroker), custom valves & ported (XtremeCylinderHeads) etc..etc..
1972 914-6 GT replica project
1986 944 Turbo
Old 11-25-2014, 10:09 PM
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Quote:
Originally Posted by TurboKraft View Post
Blast for the street/track:
- standard 1987-89 Carrera transmission
- shorten it -- no cutting the chassis
- bolt in the Carrera G50 pedals, hydraulic reservoir & lines, shifter
- minor mods to clutch slave line and shift coupler
Done. Excellent close-ratio gears for the street.
Have tortured these with engines making 700hp/600tq and 335-width sticky tires. It holds up fine.
Chris,

I've been wondering about this and I'm hoping you can clarify it for me. The 3.3 engine in my '87 930 sits back further in the 930 chassis vs. a '74-'89 911 chassis. My '87 930 chassis even has 2 different sets of trans crossmember mount holes.

So this makes me wonder if a N/A '87-'89 Carrera G50/00 or G50/01 will bolt into my '87 930 chassis with the 3.3 engine and no machining required to the G50 and no torsion tube mods to the chassis?

Most everything I've heard is 'yes' I would need to shorten a standard Carrera G50 trans to use in my '87 930. However it seems the standard '87-'89 G50 and the late 930 trans are physically around the same size.

Thank you for any info you can provide!
Old 11-26-2014, 05:05 AM
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Porsche Crest 4 speed to G50

Hi I spoke with my transmission guy who recently rebuilt my G50 he can do machining but needs to know the measurments exactly ... has anyone done this and knows what to machine of and where...
Then the clutch flywheel kit ...does anyone have the parts numbers so there is no confusion...
Old 11-26-2014, 12:29 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #35 (permalink)
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Originally Posted by totle View Post
See here that Chris often install a turbo 5th gear, That would be my next upgrade
Yeh, after the tall 5th I had in my 915 (2800 RPM @ 80-85 indicated), I was shocked how buzzy the stock N/A 5th in the G50/00 was in comparison... The mental alarm kept going "shift into 5th, dummy" - but I was already there...

Got a /50 5th gearset for $500. Luckily it's right under the nose cap, so easy to change.
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Old 11-26-2014, 03:49 PM
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Originally Posted by Kaefer View Post
My '87 930 chassis even has 2 different sets of trans crossmember mount holes.
Yes, the 1987- chassis all had 2 sets of transmission mounting holes. For earlier cars, you weld in a pair of adapter blocks (easy) that emulate the 1987- double mounts.

You still need to shorten the G50, and use the other set of mounting holes.
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Old 11-28-2014, 09:06 AM
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Quote:
Originally Posted by porsche 930twin View Post
Hi I spoke with my transmission guy who recently rebuilt my G50 he can do machining but needs to know the measurments exactly ... has anyone done this and knows what to machine of and where...
Then the clutch flywheel kit ...does anyone have the parts numbers so there is no confusion...
In essence this is combination of 1976-77 Turbo and G50 parts.
We have entire packages available, 3 different pressure plate strengths available depending on your power level. All genuine Sachs / Sachs Race Engineering.
We also have KEP-based kits available, but be aware that while less expensive they do have a stiffer pedal and aren't exactly a perfect fit on the flywheel.

As far as shipping parts here, that's not such a big deal, is it? Machining X millimeters off the bell housing and shaft is only part of the job. You can DIY much of this, but you don't want to get this part wrong and have to do it multiple times.
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Old 11-28-2014, 09:12 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #38 (permalink)
 
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Quote:
Originally Posted by TurboKraft View Post
Yes, the 1987- chassis all had 2 sets of transmission mounting holes. For earlier cars, you weld in a pair of adapter blocks (easy) that emulate the 1987- double mounts.

You still need to shorten the G50, and use the other set of mounting holes.

Quote:
Originally Posted by TurboKraft View Post
Machining X millimeters off the bell housing and shaft is only part of the job. You can DIY much of this, but you don't want to get this part wrong and have to do it multiple times.
Chris,

Do you machine the exact same X millimeters off the bell housing and shaft for all '75-'88 930 chassis? Or is the amount that is machined off different depending on which year 930 chassis the G50 is going into?
Old 11-28-2014, 12:13 PM
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Same for all.

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Old 11-28-2014, 12:22 PM
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