A more specific question is whether you can log the LC-1 and the car through USB at the same time. I wouldn't normally ask, but a friend put some doubt in my ear. If anyone can chime in that was sucessful with this hook up, please do.

 

assuming I understad the question,

yes, I log the ecu with an openport cable and the lc-1 with a serial to usb adapter... at the same time.

 

+1

 

Thanks guys

 

Yup, LC1 with serial to USB adapter, and the tactrix at the same time.

I think the general consensus is that it works well, and usually easier to setup in XP.

If you change USB ports between logs/tunes, you may need to understand to switch the Com ports. Just use the same USB for each device each time.

M

 

yup, I used a cheap ($6) ebay usb to serial adapter and it seems to work fine. Can log serial and analog thru ecu at the same time. Serial appears more accurate but analog respond faster.

 

I run LC1 serial or usb (with adapter), depending on computer used, and tactrix on a seperate usb. So one computer has 2 usbs in use and another has a usb and serial in use.

Not sure if you can log LC1 through analog out into ecu logging OBDII and AFR all on one usb though.

 

Yes you can. You need to output the analog signal from lc1 into the rear 02 sensor input in the ECU. You would have to disable the rear 02 sensor, run a rear o2 simulator patch (Tephra mod) and have a workaround for the rear 02 heater circuit to avoid a CEL (either a resistor wired in or recently developed patches to disable rear o2 heater circuit).

Then you can just read rear o2 signal with the appropriate formula and get AFR's.
All the info on how to do this is on this forum but I could point you in the right direction if needed.

Cheers.

 

Thanks, so the accuracy, precision and responsiveness any different than a straight LC1 to PC?

 

Accuracy not as good (reads a bit lean), precision good , responsiveness better.

 

Thanks, I stick with a DB9 serial and USB on my old dell as I had, LC1 is good to <.5ms there.

I only log two channels on usb anyway knock and timing, the rest - hz, boost, tps, AFR, IDC, and RPM all go through the serial through the sensor interface