injector scaling inccorect?

[LilSick]

what the flow actually does "below the knee" and what values you should put into a tune are two different subjects

[HaasExp]

The FIC1000H data show breakpoints of 280, 320, 350, 380, 420, 450 ... with the knee showing up in the flow numbers of the PW values I bolded.

The ID1000 injector data show breakpoints of 270, 370, 480, 570 ... If the knee for these is in a similar location, you would need breakpoints in the test data around that same area for it to appear in the flow numbers.

For fun, here are the two curves compared, using the ID and FIC data, plotted up to 1ms:

Attachment 158734

I'll bet the ID injectors have a knee right about the 0.35ms range which just isn't exposed in the test data breakpoints.

I'm glad someone actually gets it. It's a data resolution thing. Your plot shows it very clearly.
I have entered the "backward" data before and then clicked commit when the warning screen showed up. Vehicle did not spontaneously combust or have any other issues.

[HaasExp]

i seem to be having an issue where when tuning my ve tables im getting well over 100% reaching up to 200%. i have scaled the injectors with data from fuel injector clinic, but would like if someone could double check and make sure ive got the correct info. ive got 1000cc fic injectors

Attachment 158586

Are you sure you fuel pressure is keeping up and is stable up top?
What lambda it hitting up top? Got a datalog?

Nothing horrible really stands out in your tune. Injector characteristic look ok.
I would set the VE IAT Multi and VE ECT Multi tables all to "1.0" to begin with anyway tho. Leave the "factors" as is.

[1320bee]

Stoopalina seems to know what he's talking about.

[james1595]

I am not 100% sure as I did not have my sensor hooked up yet, I wasn't going for anything extreme, just trying to get some data points. As for lambda I am aiming for about .78. also I was pretty sure those were 0, but I guess not, just not sure why they werent

[HaasExp]

I am not 100% sure as I did not have my sensor hooked up yet, I wasn't going for anything extreme, just trying to get some data points. As for lambda I am aiming for about .78. also I was pretty sure those were 0, but I guess not, just not sure why they werent

Upload a data log mate so we can actually have a bit of a look at what's actually going on.

[LilSick]

I would set the VE IAT Multi and VE ECT Multi tables all to "1.0" to begin with anyway tho.

Leave the "factors" as is.

i disagree with everything except 44281 - make that all 1.0

you can leave the IAT multi and its factor alone for now but being you are running a turbo you might want to revisit that very soon

44282 ECT factor needs attention now, before you start ve tuning, as you are no longer running the stock 205 t stat - see attached pic

the factory engineer ramped out nearly all multiplication above 4000 on the ECT multi table - that might be why you ended up at 200% ve? the 15-17 cars have 1.4 there

[HaasExp]

i disagree with everything except 44281 - make that all 1.0

you can leave the IAT multi and its factor alone for now but being you are running a turbo you might want to revisit that very soon

44282 ECT factor needs attention now, before you start ve tuning, as you are no longer running the stock 205 t stat - see attached pic

the factory engineer ramped out nearly all multiplication above 4000 on the ECT multi table - that might be why you ended up at 200% ve? the 15-17 cars have 1.4 there

The Factors in his current tune seem fine. The VE ECT factor only changes by a few % around the operating temp (even if running a low temp stat). The IAT factors seem to closely follow the ideal gas law to calc the air density as a factor of intake air temp.
The VE ECT Multi 44281 seems totally messed up eg like 80% reduction of the VE from 3500-4500. I'd start by setting that all to 1.0 for now.
VE MultiFactors.PNG

[1320bee]

Stoopalini has a great point. He is very knowledgeable and helpful.

[james1595]

I never touched any of those tables, but that does seem like it may be an issue. Also my iats sensor is not plugged into my intake, so it's pretty much ambient temp right now

[LilSick]

a IAT sensor telling the PCM that the temp is 68 deg when it is really 160 will cause the opposite problem that you are currently having

[james1595]

its fuel pressure. now i need to decide what im going to do. i need a new regulator and bigger fuel lines. this sucks, i was hoping to eek by and not need to do this