Quote:
Originally Posted by shr133
So I ran a few changes today and seams like ( seat of the pants) the sweet spot is 20% to 25 % PI for best drive ability and acceleration..
It will still pull good at 35% but seams to lag then pull...
DI seams to respond quicker more instant but pulls harder with some PI mixed in...
And the sweet spot seams to be 20% to 25 %, Toyota may have been right on that one.
I'm currently at 35% below 2000 rpm and either 20% or 25% above 2000 rpm in all cells but .100 column...
So I'm running 35% to 20% PI at all times and it's running great...
I will probably go to 20% above 2000...
I have to get out and do some more runs and data log...
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I am surprised that this is making a difference in drive feel. Usually it is just down to the emissions and fuel economy. In theory PFI should give better and more consistent mixing compared to DI and hence has faster 0-10% burn at low speeds and loads.