Tuning bigger injectors
08-08-2012, 05:34 AM
#22
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Hey Joe, great question, maybe human nature is the simple answer, ie:
Why do Voodoo (not picking on you Voodoo practitioners, simply an example
) and other pursuits of the make believe still survive and proliferate?
Because often people want to believe in wierd stuff vs the right stuff. Astonishingly so. Like those of that might understand searching for lost quantum bolts..
Greg's work on injector characterization might represent authoritative and paramount knowledge on the subject, but plenty of people will argue with it and go their own way simply because they dont want to believe in it.
A recent example that a buddy encountered was an industry recognized producer of high end tuning products did not understand a question on injector characterization beyond simply IFR. They didnt "believe" the other parameters were necessary. Doh! :doh:
Why do Voodoo (not picking on you Voodoo practitioners, simply an example
) and other pursuits of the make believe still survive and proliferate? Because often people want to believe in wierd stuff vs the right stuff. Astonishingly so. Like those of that might understand searching for lost quantum bolts.
. Greg's work on injector characterization might represent authoritative and paramount knowledge on the subject, but plenty of people will argue with it and go their own way simply because they dont want to believe in it.
A recent example that a buddy encountered was an industry recognized producer of high end tuning products did not understand a question on injector characterization beyond simply IFR. They didnt "believe" the other parameters were necessary. Doh! :doh:
Why do something the right way when you can do it the "easy" way... All you have to do is look around at the state of things these days to see where that gets you... Here's to the lost art of doing it the right way even when its hard
08-08-2012, 11:18 AM
#23
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Here's a little write-up for those wishing to know what it takes to tune for injectors...
http://masterenginetuner.com/EFI-Fue...tors_Pg_1.html
It's not in any particular format (don't ask "Is it EFI or HP Tuners") but it shows you what injector slope is, break-points, non-linear fuel delivery, voltage offsets, compensation tables and multipliers. You can use this info to learn how to tune any EFI system for different injectors, GM, Ford, whatever...
http://masterenginetuner.com/EFI-Fue...tors_Pg_1.html
It's not in any particular format (don't ask "Is it EFI or HP Tuners") but it shows you what injector slope is, break-points, non-linear fuel delivery, voltage offsets, compensation tables and multipliers. You can use this info to learn how to tune any EFI system for different injectors, GM, Ford, whatever...
08-08-2012, 01:14 PM
#24
Launching!
Dan, another generally good article. You may want to edit it though to correct a couple things. The units for breakpoint (in Ford-speak) are not lb/hr, or even mass/time. The low slope pressure modifier is basically the same as the high slope pressure modifier in that they both change the calculated instantaneous flow rate, NOT the pulsewidth directly (since this must also include the voltage offset). Low slope actually increases due to the same Bernoulli effect as high slope. It's just damped a bit non-linearities from opening delay.
I don't mean to be critical though, as the article is pushing people in the right direction for awareness of the interaction between physical injector properties and calibration data in the ECU. By all means, keep helping to raise the bar on consumer education!
I don't mean to be critical though, as the article is pushing people in the right direction for awareness of the interaction between physical injector properties and calibration data in the ECU. By all means, keep helping to raise the bar on consumer education!
08-08-2012, 07:35 PM
#25
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. Or, never time to do it right, but always time to do it over. Such is life. 
