got a few data logs...can someone tell me what it means

n/a datalog (http://www.theheadfl.com/ws6envy/RobNA.csv)
nitrous datalog (http://www.theheadfl.com/ws6envy/RobNitrous.csv)



tell me what this means...i have not a clue.

thanks a lot

How did you log these? Not a lot of data.... usually there is at least a "record number" and "time stamp" field to go along with each line of data. And you don't have any info on "cell", "blm" or "long term fuel corrections", MPH, coolant temp, knock retard, spark advance, etc. etc. Sometimes those things can help.

Some things I noticed:

In both logs your injector duty cycle seems high. In the N/A run its up in the 90's, in the N2O run, its over 100%. Normally, that would indicate your injectors are too small. What kind of HP are you making? What kind of injectors are you using? I've seen some duty cycle numbers come out of DataMaster that don't seem to make any sense. That's why I'm asking about HP and injector size.

If you can trust the stock narrow band O2 sensors, and that's not always a good idea, your drivers side is running a little leaner than the passenger side of the engine. I would be concerned aoubt the readings below 0.900V on the driver's side on the nitrous pass. But the passenger side isn't a whole lot richer.

There is a weird "glitch" in the TPS data, when you appear to let off the throttle at max rpm. It running at 100%, suddenly it drops to 87.5%, then to "0", then comes back up to 100%, even as the RPM is coming down. Were you driving it this way? Appears to happen in both the N/A and N2O runs. On the N/A run there appears to be some missing data, since on one line its 100% TPs and 4772rpm, and on the next line its 0% TPS and 2402RPM. that's why a record number or a time stamp can be helpful.

Where are you spraying the nitrous? The IAT takes a huge nosedive when the juice kicks in, indicating you are spraying in front of the IAT sensor.

the nozzle is right accross from the iat...but a little infront of it...its that bad?

i was using efi live on a lt1 so not mant things can be logged.

spart retard was -38 to -44 degrees...that seems odd to me

Negative (-) spark means before TDC... that's actually advance.

If you are going to use a scanner, you might want to read this.... it covers things like why you see that minus sign in front of timing advance.....

Scanner writeup (http://members.aol.com/InjuneerZZ/ScanMast.htm)