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Greg Brown and i had a similar delima on the zombie. We chose to convert the diff to an early style that had a standard LSD and the ability to have a speed sensor. One of the struggles was to keep the gear driven oil pump
Hello,
I just got a 5 Speed GTS Transmission G28/57 and we want to convert an automatic car in a 5 speed.
Now we search a solution for the speed sensor. The car has the sensor at the diff and the GTS not.
Has anyone done the conversion? One idea is picking up the signal from the ABS sensor.
Thx!
It is perfectly feasible to get a signal from the ABS. I had to do this on my 1990 GT race car when I went to GTS gearbox. You will need a relay from a 1991-onwards car and some wiring spliced. The part number is 964.618.221.00 Mind you - it is not a cheap relay... As for the wiring - If you have a look at your diagram and also a 1991-on diagram you will see it is very simple - all is self explanatory...
Greg Brown and i had a similar delima on the zombie. We chose to convert the diff to an early style that had a standard LSD and the ability to have a speed sensor. One of the struggles was to keep the gear driven oil pump
We did this because we could never get the PSD to fuction properly. Because of the huge surface area of the cluck plates and the relatively small amount of travel on the clutch pressure plate, the PSD unit was extremely sensitive to temperature changes.
If we started cold with 50 ft lbs of torque release (about 40% locking factor) by the time the transmission got hot, there was zero locking factor.
And starting with more than about 50 ft. lbS borders on insanity...
The car was constantly changing how it turned in....very difficult to drive...fast.
...
.....And when a car is difficult for Mark Anderson to drive, it's really evil!
Thanks all!
Greg, your argumentation makes really sense.
If I change the LSD from my 85 automatic gearbox I have a speedsensor and a diff that I can calculate on the Road.
Here in North Germany we haven t very hot days in Summer But on the Autobahn the gearbox is at high Speed very hot.
After changing the transmission I want it Plug and play and not like the Impressions Marc and you got.
My racecar uses the psd on a G55 gearbox , I wrote the algorithm that runs the psd , it has temperature monitoring and works beautifully , all this is done in the Adaptronic 1280 ecu that I use , much better than mechanical unit .
It also controls the cooling , would love to have that g57 box makes the cooling so much more efficient .
Karsten, just a short question, what does TüV say when you convert your 928 from automatic to 5-speed transmission? I am asking because I discussed this matter with a german customer a few years ago. I know TüV is very strict when it come to any kind of modifications of vehicles.
Ċke
Ake,
I think you need a single Inspection at TÜV. We use only stock parts so I think it´isn`t a problem.
You can also upgrade your brakes from old S to GTS. If you use parts from third party manufacturers you need an ABE.(Certification of Use)
The manufacturer makes the certificat and you can use the parts. The rims, shocks.... must be listed in your Vehicle letter.
If I buy headers and exhaust from Greg, I must make a "Einzelabnahme". In this case TÜV looks at the exhaust, measure sound and emissions. If all is ok you pay and the parts are written in your vehicle letter.
Same if you want rims from 911 or Panamera. You need the Loadindex and than you can drive it.
Rims without the loadindex for 928 are forbitten.
Safety relevant parts like oil hoses for the steering must have a certificat.
More engine power, same procedure. You need than bigger brakes.
It´s sometimes a little bit frustrating, but every two years every car must go to inspection and need a new sticker. So cars with safety relevant issues must be repaired or recycled.
That s a good thing.
@Phil,
My goal with this car is original look and 928 haven t the single speedos like 911.
@Cheburator, Gregbbrd
That´s what I like on the 928 S2
- The sound of the 16V
- 100 kg less weight
- easy to maintenance, reliable engine
- rev happy, really angry at high rpm
- the look
What I dislike
- S brakes, we will change it to S4 style
- High speed braking! I don t like the light feeling from the back of the car. Not enough down force from
the S spoiler.
Early seats. Paul Champagne should sent me his price list for sport seat conversion to late style seats.
The goal on this build is a car which is full throttle proof. It was originally intended as the fastest long distance autobahn traveller.
So we will build a fun car. Godlike sound paired with superb handling.
My luck is my friend Jochen.
He owns the 928 shop with one of the highest reputations here in germany. www.landsharks.de
05-06-2017, 05:35 PM
