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Lew or Mike, Help please
Posted: Sat Mar 10, 2012 7:31 pm
by Mike_Levy
Need help. Just did this log. On the Trinity its showing the injector duty cycle, but not in the DV. I could have sworn I saw 122% and I want to see where and how. I'm just seeing pulsewidth on DV, and its maxing out at 22ms.
Anything jumping out at you as a problem (other then the maxed injectors)?
Oh yeah, the CTS-V dashboard needs fixing. It has rpm twice, but no mph and it has no KR logging.
RE: Lew or Mike, Help please
Posted: Mon Mar 12, 2012 3:26 pm
by Mike_Levy
Dumb question; This car has a dual pressure pump, right? Any way a tune can make it use the higher pressure? I'm assuming the ZR1 must use the higher pressure, since it uses the same stock injectors and comes with just a little less power then I have from the factory.
RE: Lew or Mike, Help please
Posted: Mon Mar 12, 2012 3:29 pm
by mikel
duty cycle is a synthesized pid, it is calculated in the trinity, but DV wont be able to display it.
I know there is a simple formula for it, lemme find it.
RE: Lew or Mike, Help please
Posted: Mon Mar 12, 2012 3:30 pm
by mikel
http://www.stealth316.com/2-calc-idc.htm
handy calculator, still not seeing the formula, but that will let you determine IDC anywhere.
RE: Lew or Mike, Help please
Posted: Mon Mar 12, 2012 3:35 pm
by Mike_Levy
Found it: rpm x IPW / 1200 = IDC
RE: Lew or Mike, Help please
Posted: Mon Mar 12, 2012 3:42 pm
by Mike_Levy
So 4790 x 21.5 /1200 = 85.82% which I could live with
5879 x 22.88 / 1200 = 112.09% which I can't
No idea where DV got 122% from.
RE: Lew or Mike, Help please
Posted: Mon Mar 12, 2012 4:19 pm
by mikel
could have been a quick sample as fuel pressure was coming up...