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ever_green · 11-10-2014, 01:20 AM

I'm currently tuning cars for best driveability and mileage in drive mode and I need to figure out

Is it better to

A) accelerate at near full manifold pressure (99% load) at low engine RPMs (2000 rpm Shifts) and run rich (13.5:1 AFR)

Or

B) accelerate at moderate MAP (70% load) induced by low throttle opening but higher RPMs (3000 rpm shifts), yet running lean (14.5:1 AFR)

This tune is done by modifying drive by wire tables. AFR needs to be enriched to cool down engine when under full load.

11-10-2014, 01:20 AM	#1 (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	eco tuning - low rpm rich vs throttled high rpm lean I'm currently tuning cars for best driveability and mileage in drive mode and I need to figure out Is it better to A) accelerate at near full manifold pressure (99% load) at low engine RPMs (2000 rpm Shifts) and run rich (13.5:1 AFR) Or B) accelerate at moderate MAP (70% load) induced by low throttle opening but higher RPMs (3000 rpm shifts), yet running lean (14.5:1 AFR) This tune is done by modifying drive by wire tables. AFR needs to be enriched to cool down engine when under full load.