E30 Zone

Anyone using an aftermarket piggyback system to control fueling and timing on an M52.

I got my car dynoed recently and it made good numbers but ran very rich after 3500rpm. After some reading it seems this is due to going open looped due to the lambdas not being wideband.

This got me thinking about aftermarket management and wide band to control fueling.

Just curious if anyone else has used a piggyback and what they used. I think it's easier to keep the OEM ecu DME controlling the Vanos.

Cheers RB

I think Dante is the man to speak to,

You dont need piggyback anything for an M52 the ecu is easily remapped, as for your fuelling going rich what was the AFR at the time and what power/torque did it make? Most ECU's will switch off the lambda at full throttle anyway so could be why you saw it going open loop

What software do you use Dan? The reason I was thinking something piggyback was because you get software to change the settings.

I'll get a copy of the print outs later today. The car made 217.9bhp at the Fly.

Fueling was good until 3400rpm I think it was then went very rich. Turbo rich the guy described it as. The car gave a little misfire when it started to run off.

Yep it's 15 until about 3400rpm then drops to 10 to 10.5afr