Hey guys,

My LC-1 logger output is just run via serial into my laptop (has serial input) atm.
Logger speed isn't the best and is ~0.7sec behind judging by the IPW change and what data 'richardjh' found in EvoX section.

Question is, currently i'm simulating the NB input to the ECU from the LC-1 with it set to stoich at ~15.8. Seeing as I don't drive the car daily, can I swing that analogue channel into a spare pin on the ECU and log directly at a quicker speed?
Or is the logging speed via serial or analogue pretty much the same?

Cheers.
Ben

 

Hi Ben. Reckon I can help answer this!

Yes, I've found that serial logging is a lot quicker. Here's a quick example I pulled from some random logs today...






The delay seems to be down to a pretty negligible amount... a hair over 0.2 seconds "all up", judging by the above IPW and wbo2 data. A couple of things to note...

1. The above example was at 3300rpm, so there will be a wee bit of time taken between the injection and the post-turbo reading. Don't ask me how much, but I'm sure it's not instantaneous - ye cannae change the laws o' physics! That could be most of the delay.
2. I've switched my LC-1 analogue output to "average results, 12 times a second" mode. So the reading will in fact give you the last 1/12 seconds' readings. My setup is logging 12-13 samples a second, so it's perfect, really. I get everything the LC-1 sees, neatly averaged.
3. Do you use Tactrix OP2.0? If so... I didn't end up going into the ECU pins at all - I came across a way to directly read analogue input on Pin 8 of the Tactrix OP2.0. Details here:

https://www.evolutionm.net/forums/09...0-pin-8-a.html


Serial wideband logging has been fast enough for me to do away with trying to "realign" data. I can now tune mixtures directly off the raw logs (with one eye on stuff like rapid spool-up load changes - there's still a very small lag).


Hope some of this is useful info...


Rich


PS. Regarding OP2.0 again, I messed with the standalone logging config to get it within a hair of being directly loadable into EvoScan graphs. Give me a shout if you want more details on that.

 

Cheers Rich.
Interesting Serial is quicker....

I use 1.3u mainly. I've been holding the car on the brake and loading it up on the throttle for a sec or so at certain load points to check spool AFR's, they are pretty accurate to what i'm logging in Evoscan...
Was just curious as to which one was better. Thats good then, means i can just keep my serial cable going.