TCFI/Using the Log File

[LAF]

OK I am wondering if what I am trying to do is correct. Reading the log file from the TCFI should be a very good tuning tool, in the right hands. I don't know that I am those right hands but I am trying to get some correlation of the information contained in the log file and adjust the AFR table.

Now looking at the log the obvious parameters are there I usually look at speed (VSS) and AFR first. Then I change to RPM and AFR. What I have been doing is seeing if I go lean or rich and try and see what may be happening. I check IAC and ET, use the ET/AFR.

Tonight I saw that I went WOT at 68 MPH, 3469 RPM and went to 116 MPH, 5531 RPM and AFR 13.5 at that peak. WOT I went to 12.1 for .4 of a second then smoothed 13.5- 13.8 and that whole thing lasted less then 19 seconds.

This appears to be what I would want to happen.

However when I let off which from the chart was very abrupt I got a spike of 15.7. But I also see that I would expect that going from 116 MPH to 83 MPH in 6.1 seconds by letting off the throttle only. That AFR lasted 1 second. I would expect this to be a function of cam and exhaust.

I guess what I am asking is what are the best parameters to view, make comparisons, to make sure if you are going to tweak a particular cell in the AFR table?

I know a zillion variables here, but I would like to think there are things to look for that are solid basic tuning parameters.

I am not looking to tinker or second guess, but to understand and use what I have.

I have played with .3 adds and subtracts at various RPM ranges based on RPM, MPH. AFR. and what I perceived I was doing on the bike at that given time, and estimate what throttle position I may have been at. The BLM auto apply has not changed them. But I suspect they may be too small of increments for the BLM to pick up.

Any thoughts?

[snafu88]

I have a technical question similiar to yours. I believe if any one here knows the answer to this type of tune up questions they are not taking time to answer.

Might try Road King forum at Delphi. Lots of folks there willing to help. Good Luck.

I even paid the 15.00 upgrade for this forum.
I am not trying to flame anyone, just disappointed in the user interaction here. Hoping more respond some day.

[itsafatboy]

i have had the tcfi for a year or so , since they cam out, and you will see spikes on decel, normal, but your wot afr seemed a little lean compared to my table, i am set a 12.8 . what i like is the palm pilot cable i have it velcrowed to tank panal and can watch any 3 parameters while driving,

if you ever want to talk about it, my name is bob houck,
541 332 2007 , have done alot of messing with them on my 116"