Quote:
Originally Posted by shr133
I went back to 20% Toyota had it right...
The more PI you add it feels richer but I don't think it is, it just just feels rich..
But too little feels lean... I'm sure if you readjust the fuel maps it will make the same HP... But for drive ability 20% seams to be the sweet spot......
I went to 35% below 2000 rpm and 20.3 above in all cells...
Turing the PI on and off and on was making the torque dip worse and too much PI made the dip worse... I have a slight 500 rpm dip, in 1st gear I can't feel any dip...
Computers have made tuning too detailed... If you are going to run PI you will have the best transition to run them all the time.. unless there is a good reason to turn them off why would you... and not in the middle of the torque dip... Both PI and DI have advantages and disadvantages and it seams a mix is best...
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Interesting.
I was about to try this on my car, as I was wondering if going from 0 to 20 or 50% PI and back across load/rpm cells was making some fueling erratic by putting the PI pulsewidths in the non-linear range like the problem switching PI on and off in low loads at idle.