I am in the process of tweaking in my TO4s single turbo conversion
and have a few questions.

I have an innovative wideband talking to the Datalogit and it seems
to be reading what the innovative paddle is reporting...

1. while trying to get the idle(stock fuel system except for high
flow fuel pump) get somewhere near 14:1 or so...it idles best at
12:1 but stinks...i would tweak down the values with no effect...so
I went in and started playing with the injector delay timing. I got
that idea for this forum. It worked great. I took it from the
stock setting down to about 0.55ms or so. I can now get it to idle
at about 13.8 or so. I then tried to get the car not to run super
rich at higher rpms, but high vacuum...but no matter how much I
tweaked the fuel...it didn't seem to change the readings.
Question: should I keep tweaking the injector delay down? I'm not
liking the idea of taking it much further.

2. when I put in the 1600cc secondaries...I realize i'll have to
change a lot of the "base" settings...volume...etc...but will i have
to reset the whole fuel maps? If I'm telling the ECU the volume
values of the injectors...kinda seems like what the ECU will
actually open the injectors for the correct time. I guess I also
realize there will be some minor tweaking needed...but I'm guessing
nothing major.

3. To get the innovative WB to hook up correctly, I had to run the
voltage signal out of the box to AN1 and the ground signal out of
the box to AN2...and do the AN1-AN2. Even then there was
some "jumping around" of the signal...0.4 or so AF ratio. Is that
normal? It would jump around even when the engine was not running. The output from the innovative box appeared stable on my DVM, but it could be jumping around too and the DVM is just too slow to capture the noise.

thanks
john

 

This "tweaking" could mess your engine up, maybe you could take it somewhere to have it tuned.....much safer than "tweaking" it yourself.

 

REALLY?...what's the tunner gonna do...look at the wide band outputs just like I would and make the appropriate tweaks.

lemme restate my questions, and be a bit more direct.

1. With the really short injection times, what have people had to set their primary injector lag times to be able to have actual control over the higher RPM, high vaccum ranges of their fuel curves. Every car is different...i'm looking for some ranges here.

2. When you change the size of your injectors in the PFC, do you have to automatically retune the fuel injection maps to compensate for the size of the injector change, or just the different fuel injection efficencies of the different injectors? Yes, I understand the difference.

3. Who has an innovative wb hooked up to the datalogit. Is the output steady, or does it bounce around a bit...even when the car isn't running. +- 0.3 afr.

I feel perfectly comfortable tweaking the car myself. Tuned my first standalone in 96. have a perfect mechanical finishing record in the SCCA Open class Clubrally series.

BUT... a little help from knowledgeable people is always nice and I try to give back where ever I can.

john

 

Using the factory lag settings on the 550 priomaries and have not had any issues tuning AFR in any portion of the map (idle, cruise, WOT). My car likes 13.2 AFR at idle.

When running larger secondaries the injector transition areas may require some tuning to get rid of lean or rich spots (injector overlap, sec transition, fuel, and inj lag all interplay). Post transition, your fuel should be close but when I did 1600's I also changed the fuel rails and pressure regulator so added 5-10% fuel just to be sure and retuned.

Not running the innovative wb, sorry. Our wb doesn't bounce around as you describe unless setup for tailpipe where wind can affect idle readings.

twok

 

I have the lm1 and while driving I may see jumps like that but at idle or when car is off the jump is never as eradic as you make it sound...maybe .1 AFR but not more, I think it is the high sample rate of the LM1 that does this. I datalog using the aux cable from the lm1 and I dont smooth the graphs more than just a little.

 

Hi,

The 'bouncing around' you see on the analog outs is because the analog outs are derived from 'instant' AFR with a sample rate of several hundred times/second. The LM-1 is fast enough to see misfires or just unburned gas pockets from valve/port overlap.
Download firmware version 1.33b (contained in the LogWorks package) and LMConfig version 1.3 (download section) from the innovate web-site. With that you can slow down the analog outs to 1/12th sec averaging, 1/6th sec averaging or 1/3 sec averaging. That will smooth out the graphs. Also make sure there are no ground differentials between your logger and the LM-1.

Regards

 

beautiful. Thanks!!!

I spent a lot of time playing with various ground configurations making sure they were reading the same. Ended up run the ground output from the LM-1 to AN2 on the datalogit and selected AN1-AN2...just a bunch of noise.

6 times a second should probably do the trick

John