I have looked around some and haven't noticed any heat vs. time tables on my 2000 LS1, TEA heads, stock intake, ID 1050X injectors, centrifugal blower, 236/249 .610 115 LSA cam, 4" stroke.
Have you guys come up with a way to deal with the excessively lean starts and drivability after the engine has been up to operating temp. then shut off for the time span between 20 min. to an hour or so? I was looking at some Gen 4 stuff and noticed they have a few more options then the Gen 3 stuff to deal with this type of issue. I am currently running in open loop and for reasons like this I want to attempt to go back to closed loop but I also have a question about that also.
Does the Gen 3 Ecm in regard to the nb02's make adjustment decisions based off of AFR or Lambda? Now that I am tuning based off of Lambda it has me thinking that the ECM-2300 variable needs to be changed to Stoich. for E10 as back in 2000 E10 was not as prevalent? I'm getting ready to start testing with the nbo2's in attempt to put it back in CL to at least use the STFT's and it appears all the nbo2's switching is based of off an AFR of 14.63:1? Assuming my wbo2 is correct, in my logs right now before I changed the switching voltage of the nbo2's, they would switch well around 1.03 lambda, which tells me they are switching for stoich of 100% gasoline? Based on the description in ECM-2300, if I change the Stoich. value to 14.2:1, the nbo2's will now switch at 1 lambda for E10? Is this how it is normally done? Can you also tell me what else in the background changes when we change the ECM-2300 variable?
I included a log of a heat soak start with idle at the beginning and idle at the end and you will notice the difference after the engine temp. and supporting systems have normalized. I believe it has a lot to do with fuel temp. and the temp. of everything that delivers the fuel but I don't know if there is a way to compensate for it? I also included a tune file just for reference as it is not the current file, but it does at least show the operating system and related tables. The current tune file is in OL without using the STFT also.
24-05-19 20-24-25.hpl
2000 vette force motor change 23.hpt