2001 Porsche GT3 Cup ODB2 questions

[cstreit]

Does anyone know the update frequency for the RPM and Temp outputs on the early GT3 Cup ODBII ports?

I'm thinking of using the Racepak ODBII sensor module but they are concerned that the update frequency may not be often enough to make it useful.

Has anyone use the ODBII module with an early GT3 Cup?

[Bill Verburg]

Originally Posted by cstreit

Does anyone know the update frequency for the RPM and Temp outputs on the early GT3 Cup ODBII ports?

I'm thinking of using the Racepak ODBII sensor module but they are concerned that the update frequency may not be often enough to make it useful.

Has anyone use the ODBII module with an early GT3 Cup?

Are you sure that it's OBD2 compliant?

AFAIK the early Cups used Bosch MS3.1 and then 3.2 for the '02 Cups

the specs for MS3.1 are proprietary and the manuals all just say to return to Bosch for service and updates, data analysis is done w/ a Bosch supplied program WINDARAB again it's purchased from Bosch Motorsport

[cstreit]

Bill, pretty sure it's ISO9141. Just looked I'm running Bosch MS 2.2

[Bill Verburg]

Originally Posted by cstreit

Bill, pretty sure it's ISO9141. Just looked I'm running Bosch MS 2.2

I have the manuals for 2000Gt3R and 2002GT3RS and 2002Cup

here's the 2002 info
Bosch MS 3.1 Electronic
Electronic Control Systems
The 911 GT 3 RS is fitted with an MS 3.1system.
The Bosch MS 3.1 is developed specifically for
motorsport.
The Bosch MS 3.1 engine control unit is located in
the right rear seat well.
It is not possible to change the ‘E-Prom’, because
the Bosch MS 3.1 is a hybrid unit that can only be
programmed by using a special software programme.
Exclusively, Porsche carries out any programming.
Bosch MODAS
MODAS is an application tool that can represent
measured and adjustable variables through different
user interfaces such as parameters and
graphs. It was developed to enable the fast retrieval
of standard measured values and the alteration
of the most important adjustable values at
the vehicle.
System requirements:
PC System - minimum requirements
WINDOWS 95 / 98 (no NT)
64 MB RAM
233MHz processor clock frequency
4 Gigabyte hard disc drive
Parallel port interface
CD–Rom drive
To prevent damage, the engine control unit must
not be opened.
Unauthorised opening can be proven.

the 200GT3R uses M3.1 and has the same system requirements as the '02 Cup & RS but used the WINDARAB program for data acquisition.

I don't believe that either is OBD2 compliant, it would be very surprising if any Cup was OBD anything compliant as those were US gov't requirements for street cars.

[Dan J]

Chris,
There's very little eng info at the obd2 plug. I have the wiring diagrams for that car they're in German but you can figure it out. PM me your email and I'll send them to you

[cstreit]

Thanks Bill. I've been wondering if i buy the PIWIS cable and get the software if i can learn more.... Dan, sending you that pm.

[Bill Verburg]

Dan's THE Man

[cstreit]

THe wiring diagrams should be very helpful. Thanks Dan!

I'm not really trying to log most data, honestly I'm still so busy trying to learn driving the new car which is very different than the older chassis, and figuring out 3-way adjustable JRZ's and new suspension settings, analyzing that level of data is, well, secondary.

What I'm really trying to do is use the IQ3 Dash which I've had and gotten used to for a few years, and gather basic input for warning lights plus shift lights. The darn thing revs so fast you can hit that limiter without even thinking about it.

Water temp, RPM's, and oil-pressure. The car already has a water temp warning light so even that's not necessary, I like to have a "warm up" light though, so I can tell when it's ready to roll. RPM I can grab elsewhere... However oil-pressure(!) would be really nice, there is no warning light for that right now which seems a little weird...

[claykos]

Originally Posted by Bill Verburg

I have the manuals for 2000Gt3R and 2002GT3RS and 2002Cup

here's the 2002 info
Bosch MS 3.1 Electronic
Electronic Control Systems
The 911 GT 3 RS is fitted with an MS 3.1system.
The Bosch MS 3.1 is developed specifically for
motorsport.
The Bosch MS 3.1 engine control unit is located in
the right rear seat well.
It is not possible to change the ‘E-Prom’, because
the Bosch MS 3.1 is a hybrid unit that can only be
programmed by using a special software programme.
Exclusively, Porsche carries out any programming.
Bosch MODAS
MODAS is an application tool that can represent
measured and adjustable variables through different
user interfaces such as parameters and
graphs. It was developed to enable the fast retrieval
of standard measured values and the alteration
of the most important adjustable values at
the vehicle.
System requirements:
PC System - minimum requirements
WINDOWS 95 / 98 (no NT)
64 MB RAM
233MHz processor clock frequency
4 Gigabyte hard disc drive
Parallel port interface
CD–Rom drive
To prevent damage, the engine control unit must
not be opened.
Unauthorised opening can be proven.

the 200GT3R uses M3.1 and has the same system requirements as the '02 Cup & RS but used the WINDARAB program for data acquisition.

I don't believe that either is OBD2 compliant, it would be very surprising if any Cup was OBD anything compliant as those were US gov't requirements for street cars.

Bill, would it be possible to get a copy of the GT3R and RS manuals? I have a 2000 GT3R with a bunch of RS updates. I have an 04 RSR manual, but haven't tracked down the earlier ones. Do you have PDF? Or is it paper?

Thanks,
Clay
claykos AT gmail.com