jimberg, what you've basically said to me is that if you lower your fuel pressure then you'll lean out and wreck the motor. I disagree, the adaptive strategy will keep it alive and the fuel pressure will keep the motor from dumping in too much fuel at WOT.
I do understand that in practice you can bump up the fuel pressure to make a 19psi injector act like a 21psi injector (and I alway knew that this works), all I've been trying to explain is that you can make a 24psi injector act like a 21psi injector by going the other way. I don't see why you can't accept that.
I may have been misinformed with what I was told about it not correcting to shorten pulse width, (I still haven't seen any evidence to support that it can shorten the pulse width from the stock tables in open loop) but what I said would happen in theory, you only proved me to be correct by pointing out that article. I claimed:
(after all if it did then there would be no sense in upping your fuel pressure because the pulse width would shorten)
Now in the article:
Now if you were to increase the fuel pressure, the amount of fuel delivered for a given pulsewidth would go up since more fuel will be forced through the injector. As soon as the EEC goes into Closed Loop control, it will 'see' this increased fuel pressure. The reason for this is for any given pulsewidth, the A/F ratio as measured by the oxygen sensor will be richer than what the EEC wanted it to be since now there is more fuel delivered with the same pulsewidth. The EEC will calculate the difference from what it wanted and what it got and update the Adaptive table with a 'correction factor' and use this correction factor to reduce the injector pulsewidth the next time the injector fires. Eventually what happens is the EEC is able to 'dial out' the extra fuel that was added by increasing the fuel pressure. Now you can probably see why raising the fuel pressure is only a temporary 'fix' for a lean problem. Soon you will be right back where you started from. The EEC is continuously updating the Adaptive table anytime it is in Closed Loop.
Straight from the article, If the EEC is going back to where it started from then you setting your fuel pressure to 47 psi is only a 'temporary fix'.
quote:
I suppose a lot of guys on here with superchargers would be disappointed to find out that they can only be safe at 40psi.
/quote
What Ford calls safe and from what works in practice is different, we both know that! I'm just using it to illustrate that at 30psi GTLEE is not going to lean out and wreck his motor.
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