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sorry about he email issue, not really sure what's going on as i'm still receiving email from others. try this one again 'res0bff7@verizon.net'. it should work.
as far as the amm resistor... i originally placed a potentiometer inline between the amm and ecu. it works to adjust injectors pulse width. not knowing the exact logic of the ecu, we can only speculate as to the exact effect of increasing resitiance in the signal from the amm to the ecu. however, through past experiences, several have shown that by increasing resistance, the pulse width decreases. this enables 30# injectors to be used while maintaining a normal idle level. and 300ohms seems to the be the magic spot. i used an adjustable pot initially and had problems with consistency. vibration would cause the pot to rotate, thus adjusting the mixture. this could probably be solved by using a multi-turn pot, but i was struggling with other issues at the time and have yet to do more experimentation with it. plus, it's pretty rudimentary. others have talked about piggy-backing a system which is rpm/boost driven which can make more controlled adjustment to that line. but so far i haven't heard of any who have completed the task. like i said, i've given up on this route.
from past discussions, it seems that the resistor only plays a role at idle and at 'normal' driving. since the amm signal is dropped or ignored by the ecu at wot high rpm conditions, adjusting the resistance at this point is moot. therefore only stock fuel maps are used and only larger injectors would help at this point. this brings up the possibility of increasing the resistance and adding larger injectors (45#?). idle quality could be dialed in with resistance and then at wot, the ecu would assume stock fuel maps, only more fuel would be 'allowed' in by the larger injectors. this would seem to be the easiest, least intrusive method. haven't heard of anyone going down this path though.
as far as limits of the ecu (i.e. 0-1000ohms), i don't really know. i'm sure there are stopping points in the ecu logic, just like the rev limiter. it's not that the limiter exists, to prevent you from going above, it's that nothing exists in the logic above that point. i bet a similar situation exists in other aspects of the logic as well.
anyway, hope this answers some of your questions. let me know if you can't get through on my email.
posted by 152.121.3...
, Thu, 14 Feb 2002 10:38:32, Thu, 14 Feb 2002 11:44:48, Fri, 15 Feb 2002 00:45:00
, Thu, 14 Feb 2002 20:51:51
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