Originally Posted by
cobrataz28
ok first off I am a hobby tuner not a professional. however I have successfully tuned several cars/ trucks. my questions are NOT about the tuning process itself, mainly engine management strategies. I have searched and searched and my questions are not being answered, maybe im not searching right, maybe I am.... either way any help would be appreciated. im just curious. I am not struggling in any part of the tuning process at this point. the concept is the same. the more details the better. thanks in advance. note. I have the latest and greatest non-beta version in both hp tuners and scanner.
1. in hp tuners, the open loop a/f table is coolant temp by another temp that says "none". my question is what is the vertical coolant value? why not coolant vs map like any any normal v8? seems usless ive never touched it, but maybe someone else can chime in
2. why are the values in the ve table 4 digits? is this for better resolution? usually ve is a percent. although greater than 100% is possible on paper in the higher rpm/ high load, or "boost" areas. still why is the lsj ve 4 digits? im fairly sure its in grams of airmass. lsj is run primarily off of maf though, so dont forget about tuning it as well
3.why are there hardly any tables for lsj. ls1 has tons and tons of sometimes usless tables but still you have options. lsj has no throttle follower or cracker tables. I know there are others but thats off the top of my head. it just seems like the lsj is kinda a step child compared to other pcms.never tuned any others, but the 2.2 and v6's have even less tables from what ive heard
4. I also noticed in my scanner seems to be off at times. I can log ltft on table, but will not show up on graph portion. stft work on both table and graph. also I noticed every once in a while after starting another log session that my histogram data will add on top of the previous recording session. I have to "x" the hist and restart for values to seem legit. I know most people that read this are going to want a log file and a tune file but im at work and don't have laptop. so if no one has had a similar experience im not too worried about posting log/tune im just probing around.never seen such a thing. maybe you can load log file if you have access or someone else can chime in. maybe you need to create a new config. for histos and custom pids, you are gonna want to use "parameters" as opposed to "sensors". this is opposite of what it says on the scanner, but the lsj is not a v8 and it has 1 bank instead of 2. thats why sensors will not work as well for the most part because they are designed for 2 banks.
5. once again I know I did not post log/tune but I also have notice that I have set EVERY timing table including modifiers and multipliers to achieve a certain wot timing number. my logged timing numbers are about 3-4 deg higher than what im commanding. my theory is there are other tables that gm uses, but hp tuners did not incorporate this into their software. it is easy to fix there are plenty other areas to compensate I just would like to know if other people notice similar stuff. you can zero out the other timing tables (iat spark, the positive values, ect spark, and youll see what you are commanding.
6. there are other small weird things that happen that im forgetting right now, but it ALMOST seems like I had better luck w the beta versions. that does not seem right to me. I tend to chase "perfect" numbers which I know always makes me chase my tail but I cant help to always think I can just get it a little better you know.
sorry for the long post. hope someone can shed some light. thank you