wideband logging

[steveo]

thanks thats just what i was looking for! i'll do it up right now and see how it goes.

i just hate how every damn time you unplug this thing it assumes free air calib, so every time i want to take it out and bring it in where i have a serial port, i have to purge my exhaust or pull the o2 out

i figured a good trick for open air calib, though, since this wideband is in a really hard spot to access now... just hook a vacuum cleaner up to the exhaust and disable the injectors while cranking for a bit. purges the living hell out of it for open air calib. in a short amount of time, the calibration reads just like it did in totally free air.

[EagleMark]

I have a Serial to USB adapter to hook up to the Innovate...

[steveo]

guess i could do that too, but its not even my wideband, just borrowing it, and i dont need a usb to serial adaptor for anything else.

i have tons of desktops with serial ports, its just my laptops that are lacking

[EagleMark]

That was another advantage of the Panasonic CF-74 I got for tuning, it has a serial and USB ports! For an old laptop it sure had everything needed like the no glare screen too and also survives the occasional panic brake where the laptop hits the dash before the floor... Even has Bluetooth. Pretty advanced unit for it's time and new enough to have the Duo core processor so it's not slow either.

[Six_Shooter]

Just another reason I use 14point7.com wideband products. All of their products (that have PC connectivity) use onboard USB ports.

I used to own 2 Innovate LC-1 widebands. One was used for tuning other people's cars, and one was "permanently installed" in my car. When I couldn't get a couple of my USB to serial adapters to work when I needed to tune my boss' '62 Suburban that I had recently done an engine swap on, I bought the 14point7.com SLC_DIY (v1) and have been a HUGE fan since, no free air calibration needed, easy connectivity to a PC, though there is no adjustment to the linear output, but then again, I've never need to, but it has so many other features that make it more value than any other wideband I have used (have used a couple others that were borrowed, or installed in other people's cars).

The other thing you can do, if the difference of actual (as read on the gauge) as compared to what is in TP/datalogger is always off by the same amount, say as you suggest by +1, you can simply offset the formula to compensate, by adding "+1| to the end of the formula. Depending on how your datalogging software uses teh formulas you may have to use brackets to make it work correctly.

[steveo]

i wrote my own datalogging software.

i definitely wouldnt buy an innovate, but i got one on loan for free, so i figure i might as well give it a shot

i haven't had a chance to try what mark suggested, though. we'll see how it goes today.

[steveo]

it worked! logger is +0.2 now but that's easy to correct

[1BadAction]

i figured a good trick for open air calib, though, since this wideband is in a really hard spot to access now... just hook a vacuum cleaner up to the exhaust and disable the injectors while cranking for a bit. purges the living hell out of it for open air calib. in a short amount of time, the calibration reads just like it did in totally free air.

That is a freakin awesome trick. I like it.

[EagleMark]

i figured a good trick for open air calib, though, since this wideband is in a really hard spot to access now... just hook a vacuum cleaner up to the exhaust and disable the injectors while cranking for a bit. purges the living hell out of it for open air calib. in a short amount of time, the calibration reads just like it did in totally free air.

Using a vacuum cleaner really sucks...

[steveo]

....

[steveo]

i'm definitely making progress, and realizing how super useless the narrowbands were.

my ve tables are starting to look like what i'd naturally expect for this cam, i have my maf tables closer (the stock curve was rich on the bottom and lean on the top), and i managed to get idle to 14:1, way less disgusting than the 15:1 that closed loop forced on me.

i got closed loop running again, and tuned PE to what i figure should be 13.0:1 (stock bin is ~11.1:1), and took a drive to see how close to target i was

but i couldn't get it into PE. it was a bit damp, and it wouldn't hook up on the highway anymore, even from an 80kph roll it almost broke loose into oncoming traffic.

i think that's a good sign. or maybe i need new tires.

[EagleMark]

i think that's a good sign. or maybe i need new tires.

To much HP is a good sign and even tires won't help on wet roads...

I don't know why the LT1 $EE is so much harder to do with NB, but it is way easier with others ECM/PCM/Masks. With aftermarket cams the idle and low RPM are usually more human work then data in all to get it right, following the slope of accurate mid range data into your 3d graph.

[steveo]

im not really sure why it's such a pain, but with a wideband behind it, i can see how screwy CL really was...

[steveo]

thing is, even with my o2 median voltages set at 500mv, once the trims stabilize, it's still ~15.0:1 long average on the wideband in most operating ranges.

this sucks because when i was running pure open loop at 13.5:1 to get a good reference point for scaling tables, it was running so smoothly, and now you can feel it's just not quite in the right territory...

i think i might just make sure PE is always active when the thing isn't cruising, and tune PE to get my targets.

or should i try cranking the o2 voltages up a bit more? i bet it'll get pretty unstable if i push it too far. i at least want to get it closer to 14.7 under light accel..

or, maybe there are more parameters hidden somewhere that could be leveraged to force it into open loop during some ranges?