Good target AFR for slow acceleration

vrracing · 08-05-2012, 08:08 PM

We spent most of our time tuning for WOT but the car isn't smooth when slowly accelerating as it bucks a bit. Here is a Zeitronix log from the left marker to the right marker its about 7 seconds.

The rows are:

AFR
RPM
Vacuum
% of WoT
Narrow Band TPS in volts

You can see the closed loop mode until the second marker at which point I accelerated from 3000 to 5000 rpm. You can't see it from the charts but it didnt accelerate smoothly.

The AFR rose a little from closed loop from 14.7 to a bit less than 15. Seems like the AFRs should richen up, right?

Thanks

08-05-2012, 08:08 PM	#1
vrracing Rotating Assembly Join Date: Oct 2008 Location: TX Posts: 102 Rep Power: 17	Good target AFR for slow acceleration We spent most of our time tuning for WOT but the car isn't smooth when slowly accelerating as it bucks a bit. Here is a Zeitronix log from the left marker to the right marker its about 7 seconds. The rows are: AFR RPM Vacuum % of WoT Narrow Band TPS in volts You can see the closed loop mode until the second marker at which point I accelerated from 3000 to 5000 rpm. You can't see it from the charts but it didnt accelerate smoothly. The AFR rose a little from closed loop from 14.7 to a bit less than 15. Seems like the AFRs should richen up, right? Thanks __________________ 90 S5 Vert. JDM Tii with BNR Stage1 turbo. Pineapple Racing street port. Bonez cat-forward. Corksport cat-back with Vibrant UltraQuiet resonator. RTek 2 wZeitronix w/b. HKS EBC. Vis CF Tii hood. 3000GT wing. Ground Control coilover kit with KYB AGX shocks. Red and Black leather RX8 seats. Corksport Odura lip & bumper caps, OEM Tii skirts