stock null time is 4Bhex or 75dec.. im sure this has been answered somewhere, but i cant seem to find it.. does this number actually equate to a real life measurement of time? for example, does the dec value of the null time equal the null time in miliseconds or something like that? thanks
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Jason84NA2T wrote: I'm not totally sure, always just adjusted it to where I think it should be and then trimmed from there. You could use a scope or even a good DMM to find out your pulsewidth with each setting, and then tell us what it corresponds to :-)
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[quote]Bernardd wrote:Originally posted by Chris86NA2Tstock null time is 4Bhex or 75dec.. im sure this has been answered somewhere, but i cant seem to find it.. does this number actually equate to a real life measurement of time? for example, does the dec value of the null time equal the null time in miliseconds or something like that? thanksOriginally posted by Chris86NA2Tthat would be correct.
i should add, in case anyone wants to dispute this post, that i have tested before and after making changes to see if the "effect is taking place" with a scope.
injector manufacturers often post a null time for their injectors. it would be nice to take that time, do a calculation and figure out a value..
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crowbar wrote: If I had to take a guess, I would say its an 8 bit system so 0-255 values. Therefore, if the values are the range, then 75/255 of that range.
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Bernardd wrote:
the number in decimal is the length of time it takes for the injector to fully open when 14vdc is applied to it. your example of 75 is .75 ms and can be measured and viewed by a scope.
So a stock 88 turbo bin is set at 75 for the 259cc. A JWT 450 ecu for 440cc's is set to 77. I wonder if that big of a change is really such a small change in null time or did they just make a change for sake of change and not do enough development on that facet.
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