Aux Fuel Tuning

VersaTuner for Mazdaspeed6, Mazda 6 MPS, Mazdaspeed3, Mazda 3 MPS, CX7
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mituc
VersaTuner guru
Posts: 1205
Joined: December 17th, 2011, 2:47 pm
Location: Iasi/Romania

Re: Aux Fuel Tuning

Post by mituc »

You should look into the MAF calibration and see what air flow you're hitting around 16PSI (this may differ depending on the engine RPM though). From the lowest MAF voltage this happens at you can set the MAF g/s values in the MAF cal at 10% of what they are now. You will still have to target right AFRs/Lambda values and eventually leave the closed loop load limit set high enough for the ECU to still compensate with DI when the PI is not triggered as expected (since it doesn't work on a 3D map from what you're saying).
2008 Cosmic Blue Mazda 3MPS
Built engine + WMI + GTX3071 gen2, ~509BHP @34PSI
2008 Icy Blue Mazda CX7
Stock engine and exhaust (YES!!), JBR3" + GTX2867 gen2 + Autotech HPFP, self-tuned to 330-ish BHP
zacoyote
Posts: 2
Joined: October 21st, 2020, 12:24 pm

Aux Fuel Tuning

Post by zacoyote »

Can the DI duty cycle be changed to go along with the PI to reduced load? i am considering a split system (e85 PI, 98RON DI) and would need to almost disable the DI (10% DC) for full e85 after 16psi.
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