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Hello-
> This is mainly a question for Shad but anyone who knows anything can chime
> in.
The 912E used a Porsche 923 transmission (only about 2000 examples were ever
made).
A Porsche 901 transmission is a semi-common conversion to VWs. It requires
a bit of custom fabrication, but not a whole heck of a lot, and it is far
cheaper than a Berg 5-speed or equivalent. The 1964-69 911 and 912 cars
used "901" and "902" transmissions, respectively (same basic construction,
just some had 4 and some had 5 speeds). The 1970-71 911 used a "911"
transmission, which is a modified 901 setup. Slightly stronger case.
The Porsche 915 transmission is a whole new animal - all different internals
and case and everything. It's much more durable than a 901. However,
Porsche decided to use a pull-type clutch on these. That means that instead
of activating the clutch by pushing a throw-out bearing from the outside in,
it pulls it from the inside out. This makes for a big hurdle for VW
conversion. There were a couple different variations spanning their 1972-86
use in the non-turbo 911.
The Porsche 923 transmission is basically a 915 with a 901 bellhousing. How
convenient :-). It was used in the one-year-only car, the 1976 Porsche
912E.
> With all this talk about 924/944 suspension and brakes and such I wonder
if
> you could describe what you've done to your Fastback in more detail?
Here's a brief summary:
- car
- 1972 Fastback
- silver exterior (actually, 1993 Dodge Platinum Silver)
- blue interior
- engine
- 2615cc Type 4
- the first Nickies-equipped engine ever :-)
- custom tuned FI using Autronic computer
- Tangerine racing exhaust (the first VW to ever have one of those, too
:-)
- way in the hell too many other mods to list here
- 220hp at 5000rpm, 235 ft-lb at 4500rpm
- rock-hard reliable and durable, no matter what load, what speed, or
what temperature
- braking system
- 944 rear calipers (36mm, 1-pot), hubs, and cross-drilled and vented
discs
- 944 front brakes (54mm, 1-pot), modified hubs (adapted to T3), and
cross-drilled and vented discs
- 944 aluminum master cylinder (15/16" front and 3/4" rear)
- SS-braided teflon brake lines
- ATE high-temp brake fluid
- Porterfield carbon-kevlar pads
- front suspension
- KYB GR2 front shocks
- additional aftermarket sway bar
- rear suspension
- 944 rear trailing arms
- polyurethane trailing arm pivot and spring plate bushings (modified so
there are zero squeaks!)
- KYB gas-a-just rear shocks
- aftermarket rear sway bar
- modified bump stops
- wheels/tires
- 1996 Porsche 993 front, 16x7 ET55, Dunlop SP5000 205-55-16
- 1996 Porsche 993 rear, 16x9 ET70, Dunlop SP5000 245-45-16
- chrome-plated aluminum/magnesium Porsche lug nuts (soooo light :-)
- Porsche 356 4.5" steel spare tire
- transmission/clutch/drivetrain
- 923 5-speed
- hydraulic clutch (SACO system modified for use with 923 tranny)
- needed due to 2300lb pressure plate
- 944 axles
- T4 CVs (same size as T2/944/etc.)
- 944 outer stub axles
- modified stock shifter
- reduced throw
- fitment to 5-speed pattern
- theft lock - modified to lock in reverse in the 915 shift pattern
- clear acrylic shift knob in the stock T3 shape
- climate control
- gas heater (from 412) placed under rear seat
- Eberspacher BA4
- directs hot air through stock heater ducting
- uses bilge blowers to direct cool air into heater from interior
- custom A/C system
- front-mounted high-efficiency condensor with fan
- Sanden 507 compressor running R-134a
- original VPC under-dash evaporator/vent unit
- sound system
- Blaupunkt Casablanca CD/radio head unit (silver with blue writing to
match the silver car with the blue interior :-)
- 60W amp
- pair of tweeters in front
- pair of Kicker boxes in back
- not enough to wake up the neighborhood, but enough to hurt my ears,
and that's fine :-)
- interior
- TMI blue upholstery and door panels
- TMI black carpet
- billet aluminum budvase with blue/white flowers
- aftermarket steering wheel
- instrumentation
- stock 1973 speedo, clock, and gas/idiot cluster (matches aftermarket
VDO better than earlier stuff)
- VDO Cyl. Head Temp for left bank, 2 1/16"
- VDO Cyl. Head Temp for right bank, 2 1/16"
- VDO Oil pressure, 2 1/16"
- VDO Oil temperature, 2 1/16"
- Autometer tachometer, 3 3/4" (NOT the monster size, but the VDO ones
weren't good enough for my use)
- all gauges repainted and rebezelled (mid-year Karmann Ghia fuel gauges
have nice bezels) to match stock look
- A/F mixture LED bar adapted to fit inside the "Fasten Seatbelts" light
casing
- lighting
- Xenon headlights
- foglights added
- electrical system
- battery relocated to spare-tire well for weight balance
- Optima
- quick-disconnect
- connected with two 2ga wires on the + side and a 00ga and 4ga on
the - side
- heavy-duty 70A late bus alternator
- IMI hi-torque starter
- built-in AC inverter (for laptop FI tuning :-)
- future enhancements
- 2720cc Type 4 engine, worth about 350-375hp at 8000-8500rpm
- uses a bunch of new products we are still developing right now
- will also use a dry sump system with the tank located in the
spare-tire well
- front suspension modifications (maybe a Porsche 928 adaptation...)
There's probably a bunch more I can't think of right now...
Take care,
Shad Laws
LN Engineering - Aircooled Precision Performance
http://www.lnengineering.com
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