I have an 08 GMC sierra, 6.0, 4L70, that I have done some upgrades to. Sloppy stage 2 cam and an LSA supercharger, plus supporting stuff like headers, exhaust, injectors, fuel system, etc. I took it to my local tuner and had the baseline tune done on it. He switched it to the custom 2 bar OS. I have posted the tune file below. I have never worked with the custom OS's before and want to start learning them. My only other HPtuners experience was about 10 years ago when I did a tune on a turbo Saturn Sky. I do have a wideband installed, and it is linked into the prolink on my hp tuners.
I am having a few small issues that I want to fix on my own, and learn to finish the tune out on this thing really well. Is there a good tutorial somewhere for working with these custom OS's? Is there a good walkthrough somewhere on tuning with them? Or is there an online school that teaches them? Basically how does a new guy get started understanding how to work in this environment?
The issues I am having is it trying to die on me when coming down in rpms. When I first got it, about 30% of the time, when I come to a stop it would fall on its face and die. rpm's go way to low, then it would try to recover and couldn't. I adjusted the ETC scalar and got it better, but its not gone. It still falls on its face about 30% of the time, but now it recovers and doesn't die. Any pointers on how to start working it out? I did some reading and I am thinking maybe some adjustments to the min airflow table?
Berserker as found.hpt
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Originally Posted by dangrebel
