Nevada_TDI
Top Post Dawg
I have been looking at other posts/forums and have not been able to find an answer... Here is kind of the short version: how and or why would reducing my static IP timing and increasing my Adaptation timing cause a huge fuel economy increase?
Before: IP set at top of graph and Adaptation at 2-2.5; 35 MPG absolute best on freeway at 65-70 MPH.
After: IP set at mid 50's and Adaptation set to 5.5; 46 MPG driving as fast as was surrounding traffic. Every possible speed between 55 and 85 driven on California freeways.
History: We traveled from Reno-ish at 4600' elev to Cambria, California at sea level and back. On an 820 mile round trip, I filled to top before leaving (with winterized diesel) drove 500 miles and added 5 gallons of non-winterized diesel, drove 320 more miles and filled to the top once again with non-winterized diesel; I maintained a 2% Bio-D from start to finish.
What gives? I realize winterized diesel has less energy but certainly not 25% and I was not driving moderately for the majority of the trip.
A couple of things noticed: I did not have the same power at WOT above 3500 RPM, but the power band seems to come in quite strong at 2500 RPM or so--which did not happen before--, and there is more "clatter" when the engine is at idle, and significantly more at WOT.
According to everything I have read, my current timing settings will not cause any harm in the long or short term, but can reducing the total timing cause such a huge increase in fuel economy? Am I missing something, and if so will those knowledgeable please respond to help clarify this question for me? Sorry for the long post.
Before: IP set at top of graph and Adaptation at 2-2.5; 35 MPG absolute best on freeway at 65-70 MPH.
After: IP set at mid 50's and Adaptation set to 5.5; 46 MPG driving as fast as was surrounding traffic. Every possible speed between 55 and 85 driven on California freeways.
History: We traveled from Reno-ish at 4600' elev to Cambria, California at sea level and back. On an 820 mile round trip, I filled to top before leaving (with winterized diesel) drove 500 miles and added 5 gallons of non-winterized diesel, drove 320 more miles and filled to the top once again with non-winterized diesel; I maintained a 2% Bio-D from start to finish.
What gives? I realize winterized diesel has less energy but certainly not 25% and I was not driving moderately for the majority of the trip.
A couple of things noticed: I did not have the same power at WOT above 3500 RPM, but the power band seems to come in quite strong at 2500 RPM or so--which did not happen before--, and there is more "clatter" when the engine is at idle, and significantly more at WOT.
According to everything I have read, my current timing settings will not cause any harm in the long or short term, but can reducing the total timing cause such a huge increase in fuel economy? Am I missing something, and if so will those knowledgeable please respond to help clarify this question for me? Sorry for the long post.