ET Xtreme 68-140

[kensmith]

Has anyone done this setup with a 215 and siemens deka 80 lbs injectors with MaptunerX stage 3 9000 flash.

[tiderider]

From my experience with tuning an ET137 + 4mm and 60 injectors with a siemens ECU is very difficult, especially for fine tuning. You'll probably need to use a Dynojet Power Commander V 25-023 and the power commander Auto tuner module AT-200 to make it work with a fine line.

Don't forget flywheel bolts and a good set of racing valves with titanium retainers.

[raiderx72]

I had that set up on fully built everythingon my rxp for years but with a reflash there was no such thing as a maptunerx haha

[kensmith]

Ya, Riva has a tune just for this setup with Siemens #80 injectors makes it alot easier. what GPS speeds were you running ?

[kensmith]

I already have installed Riva titanium valve retainers. Word is @ only 9000 rpm I should be good.

[kensmith]

Also flywheel bolts are on the way.

[raiderx72]

Ya, Riva has a tune just for this setup with Siemens #80 injectors makes it alot easier. what GPS speeds were you running ?

I don't know you set up or what else you have done but 88 was my best.

[tiderider]

Ya, Riva has a tune just for this setup with Siemens #80 injectors makes it alot easier. what GPS speeds were you running ?

Riva states that a tune for the 137+4mm set up with 60 injectors was available but were unable to make any changes to my AFRs due to the ECU being a Siemens. I Was told that they do not have firmware for many Siemens ECUs for accessing them. The Siemens ECUs have a difficult time with Fuel injectors greater then 48lbs. I would do the 68-140 with a Bosch Ecu and not the siemens. You'll probably need to add a dynojet auto tuner module with the dynojet power commander V, 25-023 for siemens ECUs.
It will make your afrs perfect anywhere you ride, all the time.
You can also auto tune with the dynojet to create a Fuel map/maps at different locations, store them in the Power commander V 25-023 and simply switch from 1 map to another stored in the power commander V without the use of the O2 sensor at that point.

[kensmith]

I talked to Rivas MaptunerX programmer and he said to run Siemens #80 injectors and it will work work with his map.

[kensmith]

Did you have an aftermarket Fuel pressure regulator ?