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Injector compensation, help with entering values
Posted: Sun Sep 13, 2009 8:39 pm
by megomaniac
How do I enter the dead times that came with my injectors into smanager?
the (usec) and (ms) is confusing. I searched google and they are the same unit, but I don't know where the decimal goes?? I want to run a 55 or 60 base pressure. I've attached a pic of dead time chart.
Thanks
Posted: Sun Sep 13, 2009 10:13 pm
by fly_n
1 milli sec(msec) = 1000 micro sec(µsec)
move the decimal point 3 places to the left on the manufacturer specs
so 3000 µsec = 3 msec,etc
Posted: Wed Sep 16, 2009 8:46 pm
by megomaniac
So @ 55psi base fuel press.
8v=3ms
10v=1.805ms
12v=1.395ms
14v=1.045ms
16v=0.815ms
correct?
Posted: Wed Sep 16, 2009 9:49 pm
by fly_n
correct
Posted: Sat Sep 19, 2009 8:03 am
by megomaniac
Well I got the values entered and it idled like crap. Had to take a ton of fuel out, got it idling at like 14.7 with new plugs. It was so rich after i entered the inj. comps. that cyl3 miss firing and i could see gas on the pistons!!
Posted: Sat Sep 19, 2009 9:10 pm
by fly_n
is that a screen shot of your cal above?
if yes,whats the 10% overall trim u have entered for?
are u H24 now or lower than stock fuel pressure?
what is your fuel pressure?
55psi base differential or 55psi at idle with vac line connected?
is that the right dead time info for your injectors?
i assume they still dont make 1000cc saturated injectors,so are u running a resistor block?
Posted: Sun Sep 20, 2009 11:00 pm
by megomaniac
the screen shot was just an example, not actually using any of those settings.
I went with a 60psi base pressure,(vac dissconnected) with bosch 1000cc saturated injectors and no resistor box. Their fairly new on the market. I think they came out some time last summer. they work great, easy to tune so far. I just need more time, hit vtec for the first time today, its going to be awesome when i can open it up and really see what it'll do.
Posted: Mon Sep 21, 2009 1:01 am
by fly_n
i assumed wrong lol.
if everything running sweet,than thats good to hear.
i dont know what stock H22 fuel pressure is,but all the fuel u had to pull off the base map was prob just the increase in pressure your running with no fuel trims set,again i assume H22 stock pressure would be lower than 60psi.
u could prob get away with a bit less pressure than that,would be more forgiving on your fuel pump in the long term,especially if your gonna be seeing upwards of like 20lb boost or something.
might be a bit nicer to tune at idle as well,by taking some load off the injectors.