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alfasud.ti · 07-02-2008

The A/F ratio is extremely low (i.e. rich) at mid+high RPMs. Also notice that when it gets very low at 6000rpm your torque suddenly drops.

This is probably because the car has not been remapped and the ECU always gives lots of extra fuel when it senses a mod that increases the flow capacity of the engine. Optimally it shouldn't be lower than 12.5 IMHO. Your car's fuel consumption must have increased dramatically and you may even hear the exhaust pop on lift-off.

When you install the Q+ you will notice that the injection duration map will have mostly negative values at high RPM to reduce the injected fuel instead of the opposite you would expect. This is normal and you should see a noticeable increase of BHP and smoother power curves after the remap.

07-02-2008	#6 (Post Link)
alfasud.ti AO Member Join Date: Feb 2005 Location: Athens, Greece Posts: 818 Member car: Alfasud TI	Re: 156 GTA Rolling Road run :) The A/F ratio is extremely low (i.e. rich) at mid+high RPMs. Also notice that when it gets very low at 6000rpm your torque suddenly drops. This is probably because the car has not been remapped and the ECU always gives lots of extra fuel when it senses a mod that increases the flow capacity of the engine. Optimally it shouldn't be lower than 12.5 IMHO. Your car's fuel consumption must have increased dramatically and you may even hear the exhaust pop on lift-off. When you install the Q+ you will notice that the injection duration map will have mostly negative values at high RPM to reduce the injected fuel instead of the opposite you would expect. This is normal and you should see a noticeable increase of BHP and smoother power curves after the remap. "Black holes are where God divided by zero." - Steven Wright