Well I'm on the road today it's snowing and cold. My engine oil temperature started to rise to 190°F which I know is a sign over advancement of timing. I pulled over and subtracted 2 degrees off the cruise timing in a few miles the engine oil temperature dropped 30 degrees back to the 160 realm again.

 

I know some of you got my economy tune you might want to check cruise timing to bring the oil temperature back in line.

Mike, Do you have some timing numbers that we should be looking at or is that just too vague based on truck mods/altitude/flat road/inclined road/etc. Timing should advance or retard when going from flat ground to a climb? What are some timing numbers to shoot for when looking at best mpg? I do have your Eco tune and when we talked on the phone last spring, you said I wasn't getting into the higher timing numbers that would give me the best mileage. Today when driving to work on flat ground, 70 mph I was seeing engine load around 25+% and timing in the 17-19 range. I hand calculate my fuel use and never see over about 17.5mpg but maybe thats the best my truck can get at 70mph? At 70mph I'm right at 2000 rpm with tires size corrected in the Quad. 

Edited January 29, 20241 yr by 5akman
added to the sentence

On 1/29/2024 at 9:39 AM, 5akman said:

What are some timing numbers to shoot for when looking at best mpg?

Ok. Best timing numbers are based on the the engine oil temperatures. When your timing is correct the coolant and oil temperatures will fall slightly and engine load is reduced. Like myself I got to calculate the pop pressure on mine a bit more being I'm a bit more retarded with higher pop pressure. Colder IAT typically likes more timing but need to keep retarding also to be able to build boost quickly. 

 

On 1/29/2024 at 9:39 AM, 5akman said:

I do have your Eco tune and when we talked on the phone last spring, you said I wasn't getting into the higher timing numbers that would give me the best mileage.

I just released the newest version (2024.12.1) of my Eco Tune for December.

 

On 1/29/2024 at 9:39 AM, 5akman said:

I hand calculate my fuel use and never see over about 17.5mpg but maybe thats the best my truck can get at 70mph? At 70mph I'm right at 2000 rpm with tires size corrected in the Quad.

The 265's are bit taxing to MPG's. I've created the newer version of tune with deep retard for boost building and power is nearly instant. Still can reach below 20% engine load and keep in the 20's for MPG's.