ok guys I have literally spent every second of spare time I could find reading and playing around. I took a stock tune and started from scratch, and think ive made a decent aggressive street tune. truck seems to run very well, no smoke other then a hard stomp down on it I did see some but nothing crazy. egts get up around 1500 if I stay into but I'm around 100 mph at that point so letting out anyways.
My biggest concern is figuring out how far I can push it, without crossing the line! Ive been using joshs timing calculator, thank god he made that and shared it, but man the cummins calculator is way easier!
I'm going to post MY tune and if you guys get time take look and give me some pointers on where you think I could benefit, I will say my mileage went from 13.5 to 19, I reset it and have driven 150 miles or so and wouldn't call them easy as I was doing wot runs and still reading 19. Find out when I fill up I guess.
My biggest questions I'm still trying to figure out is the altitude tables, and what i can do with the turbo vanes on the top end if anything? my boost seems to stay under 30 which is what i think i want to be around, so wasn't sure if should mess with that much or not. I will say it pulls hard from a dig all the way till i let out!
I deff want more info on that adding a button that would be an awesome addition! hell i just started using the bbx logging and thinks that great ive always just used the laptop and kept a pad of paper and made notes while driving, not best idea but hey it worked!
Thanks for that info in max uS and timing info been looking for that and most i could find said 2000us was make safe but i figured that was probably older trucks.
anyways now that i have wrote a novel heres the tune let me know what you guys think!
Sorry but i didn't read through the whole thread, what are your goals? I'll move to some basics.
OK, looking at this tune that you posted on page 3 (think this is the latest tune posted), LBZ 1 street 3, i see some things that stand out.
1st, use the stock fuel pressure tables, they work well on a LBZ
2nd, use stock vane position tables. If you want to increase boost, then use the desired boost tables, not vane position. The stock boost tables show boost plus baro. Example, if you want 26psi of boost, then you need to add 26psi plus your baro, lets say 26 plus 12 baro = 38. set your max desired boost on the low elevation table to 38 (lower right of the table). Adjust accordingly at desired rpm. Tow tunes should have a couple/few more PSI in the mid range, fyi. Play with it for best egts and mpg, but don't go over 30psi boost (-baro) if you want to be safe. More boost will hurt mpg, fyi.
3rd, your main injection pulse table is jacked up. Use the stock table and add pulse to the lower/right area. Table should have declining pulse from high rail psi down (stock is the opposite of what i mean). This way if the truck can't keep rail psi, then the ecm will pull duration back until it finds a happy medium. If the pulse table goes from low to high as the rail psi drops, then the rail psi will drop like a rock as the ecm will keep demanding more and more duration as the rail psi drops. This is not good and will cause engine limp.
Your timing table is not too bad, you still have the stock timing limiters in place so i don't think you will have issues running what you have in that tune. There is a smoothing feature, you should learn to use it.
These are just some basic pointers. You have limiters active, not a bad thing, depending on your goals but could limit any changes that you make.
