Breaking in a rebuild and want to get an opinion on my log
 

So I hope I am not asking something that has been covered. I read over a lot of threads including the lengthy AFR one on this subforum which helps a lot!

So I am breaking in a rebuilt engine on my 88 TII and I am using an LC1 wideband and logging it with the rtek 2.1.

I don't have any hands on experience tuning and want to make sure I am ok and on the right track. I am running the stock turbo with no boost controller and a ported waste gate. I have a DP and midpipe. I also have all new fuel line, walpro 255, sent the stock injectors out for cleaning and flow testing.

I just wanted to understand if AFR jumps all over went driving around and you tune more with WOT pulls or what? I have seen where people say to start in the WOT area of the map and then work from there. I obviously don't have much room to do that while trying to keep it under lighter load and lower RPMs for break in.

From what I think I understand you do a consistent pull of some sort and tune on that snapshot of log trying to get closer to 11 AFR.

I am not trying to make any changes right now or start tuning I just wanted to make sure that the crazy number fluctuation is not something I should worry about so I don't mess up before I even drive it fully. I am sure I will mess up somewhere but I don't mind making mistakes and learning.

I will keep reading on but I really wanted to get some feedback.

Thanks for any help and sorry for the ignorance on my part.

huh? :)

When in "cruise" it is normal for the AFRs to swing back and forth between lean (over 14.7) and rich (under 14.7). If you always above or always below 14.7, then you need to adjust your map.

When WOT, the AFRs should stop swinging past 14.7 and remain relatively steady....or at least that's the result you tune for.

Yeah, what I said didn't make much sense there... :)

Your answer is what I was thinking. I drove a good bit more today and also search around more. When I push the pedal down to the floor it goes levels out much more. Thanks for the reply! Great product!