I have some questions about rpm logging with the devices above:
ddilenger: I have a question about the LM2. I was reading this review on the LM2 and they were having troubles with logging rpm accurately. Do you encounter this problem?
Review:
http://www.digitalreviews.net/reviews/automotive/innovate-lm-2-vs-zeitronix-zt-2-airfuel-ratio-meter-comparison-review.htmleliotroyano: How do you record the data with the SSI-4? with a PL-1? and then analyse on a computer?
Also how do you sync the AFR reading from the LC-1 with the rpm from the ecu?
Update: Found this.."
There's an analog cable that comes with and plugs into the LM2. The Black/White wire of the cable is where a tach signal gets connected to. ...
Do you guys slice the tach signal ?
I datalog this signals: O2 wideband, RPM, Boost, EGT and Oil Pressure directly from the SSI-4 box. In the past I tryied to figure out how to sync the KW1281 RPM signal from my non-OBD2 M383 ECU with Innovate O2 signal (5V analog or ISP2 protocol) signal from LC-1 but I don't have luck. Then I use the SSI-4 box. I mean is not impossible but needs some software skills in that moment I don't have.
The SSI-4 is receiving the signals this way:
1.- O2 signal directly from the ISP2 serial signal from the LC-1,
2.- RPM (frequency signal) via M383 ECU pin #6 conditioned through a 2KOhms pull-down resistor.
3.- Boost (5V linear signal) via a GM 3Bar boost sensor.
4.- EGT (5v linear signal) via VEMS K-Thermocouple Amplifier module.
5.- Oil Pressure (5v linear signal) via 100psi oil pressure sensor.
Then using LogWorks you can made nice datalogs for tuning diagnostics.
About the LM-2 I think the case is similar to my Innovate SSI-4 box. LogWorks software, not LM-2, should sync input signals like RPM from OBD2 PIDs or analog input. But should be easy doable I think.
