Quote:
Originally Posted by greasemonkee
I was playing with a d15z1 last week and I noticed it required considerably more manifold pressure to maintain constant speed or accelerate. This should be the rule, plus you eliminate some pumping loss by having the throttle closer to 100%.
As a safety precaution, I would definitely limit pressure columns up to around 650 mbars in that super lean mode. I normally transition back to stoichiometry at around 600-650 mbars as seen in table below.
My ugly, fuel wasting low cam target:
This same engine when NA did much better running lean oddly enough, hence the mild 15.2 target.
Have you considered finding a straight, constant grade and traveling it while shifting the timing gradually (as well as afr) to find the lowest injector duration that you can achieve? I would graph out the data (provided Neptune can do graphs) and see if there are any trends on the same section of road at the same speed every time. If you had an economy meter (or something to juggle the data and spit out a relative mpg in the software?), you might could go by that possibly?
Just be sure to hold your IAT's constant, among other variables, to make it easy on you, but you probably are well aware of the concept. |
I need to find a hill like you said and do some more testing. Thanks for the idea.
Heres my fuel map;
The highlighted areas are my lean burn cells. This is what had me stoked. Its still making great power at these lean conditions. So when I go to 23:1 A/F it moves it over to the right one column. I just need to try it to see what happens. I guess LOL