Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - lower engine load better for MPG, torque converter to blame?

ever_green · 04-12-2013, 04:36 PM

with the torque converter fully unlocked my engine speed jumps to around 3000-3500rpm under load. At 3500rpm my ECU enriches the mixture. after some experimenting i managed to trick the TCU to keep the TQ locked using the throttle while increasing engine load to about ~95% at 1500rpm. you just have to slowly open the throttle, something to do with the drive by wire system. if you just step on the throttle (even if your only apply a bit of throttle) the torque convert will start slipping and RPMS jump. I found 1500rpm (TQ locked) and ~95% engine loads to give me best results but if anyone thinks i can improve on this to reach my 30mpg city goal please let me know.

04-12-2013, 04:36 PM	#3 (permalink)
ever_green Master EcoModder Join Date: May 2011 Location: Toronto Posts: 264 gueff - '19 Mercedes Benz A250 4MATIC AMG 90 day: 30.55 mpg (US) Thanks: 8 Thanked 79 Times in 33 Posts	with the torque converter fully unlocked my engine speed jumps to around 3000-3500rpm under load. At 3500rpm my ECU enriches the mixture. after some experimenting i managed to trick the TCU to keep the TQ locked using the throttle while increasing engine load to about ~95% at 1500rpm. you just have to slowly open the throttle, something to do with the drive by wire system. if you just step on the throttle (even if your only apply a bit of throttle) the torque convert will start slipping and RPMS jump. I found 1500rpm (TQ locked) and ~95% engine loads to give me best results but if anyone thinks i can improve on this to reach my 30mpg city goal please let me know. __________________ Last edited by ever_green; 04-12-2013 at 04:49 PM..