I wanted to share some of my secrets im still learning about Quadzilla timing. I'm finding that you can start as low as 13° on the 1.5k band. This really does build way bottom end power. Im still running +4.5 step up to the next. I was playing with my economy tune and when I drop every band by -1° it really did make my truck want to rip the tires off. Boost builds super fast. Now keep in mind my injectors 7 x 0.010 @ 320 bar. Then ive got winterized fuel and daytime weather of barely 40°F.

 

Stepping up to 14° or 15° in the 1.5k really took the power down for me under current fuel and temperature. 

 

As for my summer tune as the winterized fuel came on really start making it buck and pop in the 3k realm which is a sign of over advancement. This why I shift every down 1°. Originally I started at 15° and +4.5 step up worked good in the summer with LOW cetane and warm weather. As the winterized fuel starts it slowly raising the cetane hence why my summer tune starts bucking in the upper RPMs. 

 

Then today coming back from town I stopped and dropped that 1.5k to 13° and step up +4.5 now it jumps up to 15 PSI of boost, wire tap jumps in and it feels like a continuous power all the way very smooth and pulls so hard in 3rd I could hear the tires giving in and starting skip and spin.

 

Remember neither the Quadzilla or ECM cannot sense cetane changes so when the tune just don't have the power because cetane change some times its best to try a bit of retard. Lower the cetane and warm weather the more you can advance timing.

On 11/3/2020 at 8:14 AM, LorenS said:

I understand the chart, I'm just pointing out that there is more than one way to raise the Cetane rating, and that chart is likely from "Method 1" at the refinery by removing less volatile hydrocarbons.  I mean, there's a reason we don't burn #6 Fuel Oil despite energy of 152k BTU/gallon, but giant, slow piston speed marine engines do.

 

Exactly... fuel that is refined with higher Cetane is not the same as pump #2 that has Cetane booster added to it. 

Many fuel stations these days winterize their fuel chemically instead of blending #1 into it. This will also have an effect on the BTU's, in a positive way, over blending.