Turbo engine management

[r lane]

I have a 92 911 Turbo with an Electromotive EMS. Has been in service for 22 years and for the most part has performed well with a hiccup here and there. I have been having intermittent issues esp around warmup for sometime. I have tried different settings and several head temp sensors but no stable pattern in its defects. Once warm, she performs well. Am thinking of installing another system due to this ones age and the fact that it is no longer supported. Wanted to see what systems others have used with success. Thanks, Bob

[Uwon]

I have a 3.4 turbo (based on a 3.2) with the Electromotive tec3r EMS installed about 25 years ago. Originally the temp sensor was linked to the oil return line from the motor as it took a long time for the oil to warm up which resulted lousy AFR readings and bucking for about 20 minutes. I then bought the traditional head temp sensor and installed it by the cylinder 3 head. It would work for a while giving me reasonable idle but would crap out for some reason…..I replaced it a number of times over about 10 years or so.
I then experimented by moving the sensor to the top of cylinder #4 which produced better results and finally moved it to the tin hot air pickup for the left heat exchanger. That simple change and recalibrating the fuel enrichment in the software did the trick for me.
Hope this helps.
Cheers,
Johan

[evan9eleven]

To add a data point that you might not get elsewhere: lots of guys "over here" are running Maxx ECU from Sweden on all manner of turbo cars, also both air- and water cooled 911's. My dyno guy is an expert on this ECU and is even a beta tester for Maxx... he's tuned some 1200hp monsters with it. It will be my next ECU, the level of flexibility when tuning looks quite impressive.

The name is pretty stupid, but guys I seriously respect run only this for engine management.

https://www.maxxecu.com/