First of all a big thanks to everyone.  I have been lurking around and this forum has helped me a lot.   
 

I bought the truck recently so

im not sure what all was done but it was built for compounds and they ran that some and it looks like they about caught the firewall on fire and went to the S300. 
 

I was told it has an upgraded pump.  I don’t know. It’s green or blue I’m not sure if that helps.  
 

I have the tune dialed in for driving around and up to 5th gear.  Pretty sure the map is good for what I have as I bumped everything up 2 and it was just straight smoke. 

I did try a big injector tune I found on there that started at 70, went up but 6s and then held at 100 for a while before fueling up again at like 18psi, but it was too much for me, I think.  

 

I realize I’m not pushing timing much or at least I don’t think I am.  
 

I’m kind of rambling here but point is truck runs great up to 5th gear.  Cruises at 60mph at 700-800F but at 70 in 6th I’m at 1700rpm and EGTs cruise at about 1000F and if I go up a hill it will climb and I have to drop a gear.  I did have a tune that was similar, starting at 67 and cruised a little better in 6th.  
 

Any thoughts on some changes I could make to help my low rpm cruise?  The 13* timing was pretty fundamental to making this work, as suggested in other threads.  
 

Power Levels:6

 

Timing

Fuel Load Timing: 1.5

Low PSI Timing Reduct: 5

Timing Reduct Scaling: 50

Light Throttle Timing Adv: 1

Light Throttle Timing Load Limit: 25

 

Timing vs rpm

1500: 13

2000: 17.5

2500: 21.2

3000: 24.5

Timing Max: 25.5
 

Wiretap

None

 

 

RPM Limit: 3200

 

Power Reduction:

 

0 PSI %: 69

1 PSI %: 70

2 PSI %: 71

3 PSI %: 72

4 PSI %: 73

5 PSI %: 74

6 PSI %: 75

7 PSI %: 76

8 PSI %: 77

9 PSI %:79

10 PSI %: 81

11 PSI %: 83

12 PSI %: 85

13 PSI %:87

14 PSI %: 89

15 PSI %:91

16 PSI %: 93

18 PSI %: 95

20 PSI %: 97

22 PSI %: 99

24 PSI %: 102

26 PSI %: 105

28 PSI %: 108

30 PSI %: 111

Edited September 13, 2024Sep 13 by FarmerBrawn

I'm running 26 to 27 degrees at 2,000 RPM's. Then yesterday I was on I84 running 82 MPH which is 2500 RPM and just about maxed out at 29 degrees of timing. 

 

Bigger the injectors more timing is needed. You need to base the timing off your engine oil temperature like I do then you'll find a happy spot in the timing. Keep in mind I'm running a 200℉ thermostat from a 6.7L Cummins and then the high timing. This brought down my EGT's and boost pressure considerably making the engine much more efficient. My engine oil temperature is roughly 30 to 35℉ cooler than coolant temperatures. I would suggest you give me a call and I'll work through your tune with you. 

 

The ideal oil temperature for a 190℉ thermostat is about 160 to 165℉. Some of this could be your light throttle timing limit too. You can hold cruise timing, if more than 5 PSI of boost above that pressure you are asking for head gasket issues.