Supercharged Horror Stories

[B E N]

Somewhere around peak torque then. I wonder if pulling timing out in that area would help, not that it helps you now I look forward to seeing your new build.

 

[Shrugy]

Hello Mark,

A factory 2013 Roush Stage II with 133k. It’s been a great truck. No nightmares. Only issue so far is needing to replace one of the three yellow LED’s in the grill. Also, with the JDM tune, I’m now averaging 15.2 mpg (mostly highway miles).
Also, more importantly, thank you for your service!

Josh

I need more info on how you get 15.2 MPG - that's incredible! I have a stage 2 roush running an SCT tuner but that sounds insane!

 

[MTF]

I need more info on how you get 15.2 MPG - that's incredible! I have a stage 2 roush running an SCT tuner but that sounds insane!

If you stay under 65-70 on the highway with no hills and you don't get into boost and don't remote start .
I guess that maybe possible, JDM's Tune is conservative.

 

[vegascarnut]

I need more info on how you get 15.2 MPG - that's incredible! I have a stage 2 roush running an SCT tuner but that sounds insane!

Yeah I'll say! I don't get near 15.2 on the highway—maybe downhill, and I have a JDM tune, same setup.

 

[B E N]

If you are running low grade fuel you will have a hard time hitting 15 mpg, these trucks pull a bunch of timing at cruise on low grade fuel. Also, if you drive at 75+mph you will not see over 15. Try setting your cruise at <65 and see what your economy does. Wide, tall truck with a lot of ground clearance, air resistance is a major problem, add in tire size, engine displacement and gearing and you get a piggy.

 

[PTYHRD]

I average 12.5 on my roush. It’s not tuned other than from when the sc was installed. I should probably do the JDM kit. Can anyone recommend the livernois upgrades too?

 

[BoostedToy]

Errant info on my part I just realized. The tune is from VMP not JDM. My mpg is actually a bit up from before but it’s probably 90/10 hwy to city driving. Checking in right around 15.4 hand calc and 15.6 computer. Keep in mind this is over 5,000 miles worth of sample as well. This is keeping it at 70 mph on cruise. Mileage goes down in concert with fun miles.

 

[Canuck714]

You are doing well. I stopped looking at mine after a while, but when I did hand calculate a couple tanks I think I avereaged 13.5.
My other naturally aspirated Raptor only got 12 lol