Let talk mpg and how timing vs fuel helps

[leathermaneod]

I think it's very interesting and I appreciate you taking time to explain all that! Having dynamic timing is really cool in my opinion and it's awesome to be able to understand a little about how our trucks use it. 

[Mopar1973Man]

This is one of strong reasons I've never done a P7100 conversion because the timing is static which gives the VP44 better chance at producing clean power where the P7100 is rather dirty and typically lower in MPG.

Edited October 7, 2016 by Mopar1973Man

[Me78569]

I drove into work today with timing set differently.  

 

My normal tunes have timing at 8* and %100 scaling, so at cruise the quad might add ~1 or 2 * timing.  

 

I changed the tune to be 12* timing with scaling at %50.  This would make masx timing on top ~6* but gave me ~3 * at cruise.  

 

 

Again this is city driving so the oem timing never got into the cruise map, but I was seeing low load timing of ~18*.   I dont know if that hurt my mpg or helped but I am at least getting a better grasp on how things worked.  

[dripley]

I appreciate what you doing with this myself. It is interesting reading but far over my head. I understand what timing is but not to the degree you are taking it. I have had some of the best mileage ihave ever had while running the comp. Anything better would be gravy. Even though I dont buy my own fuel, getting good mileage is always a fun accomplishment. Keep on keeping on.

[Mopar1973Man]

Like today I'll be packing home. So I'll fill again report what my MPG is for this tank. It will be slightly higher because drive just empty truck for the last few days. I'm sure my daily MPGs were at least 18 or so. I lost my tune with the updates of the software. I'll fix it when I get home.

[Me78569]

Alright,

 

Some more information from driving.  

 

It seems that highest cruise timing comes when the quad reads ~15%-%20 load.  The ecm was commanding ~16.5* I noticed that  cruise EGT came down by ~100* when I turned the quads timing on which was giving an extra ~1.6-2* of timing at that part of the map.

[Me78569]

So just an update to this thread as we learned more with more people using the beta tuning with the new Cruise timing adjustment.  

 

It seems that timing in the 20* range is getting the best MPG so far.  I know the engine really starts to rattle when you hear the timing jump.