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Old 05-08-2014, 09:16 AM   #15
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Slemnah - I did not know there was that big of a change to the C13 and 15. CAT told me it was the same block as the C12, but looks like there were big changes to the pollution controls. This just reinforces that I never want to trade my coach for one with more government regulations. Plus the fact that when CC made these things top quality materials were used that show little wear in 12 years.

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Old 05-08-2014, 09:51 AM   #16
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Originally Posted by distaff View Post
Thanks Ron. Don't know why that link doesn't work when I copied in here.
If you look at your link, "http://http//www.rvtechlibrary.com/engine/Cat_RV_Performance.pdf" you'll see it starts with "http://" shown twice. That is the problem as it should only be there once. This type of error is common in markup language scenarios, like this forum uses, when the hyperlink dialog pre-inserts a "http://". If you don't notice it and simply paste in a URL, you get the double Hypertext Transfer Protocol (HTTP) entry.

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Old 05-28-2014, 04:36 PM   #17
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I got my first chance for a longer drive today. Drove 180 miles and was averaging 7.1mpg until I hit the hilly country. After that it dropped to 6.1, still much better than 5.2mpg. I am very happy with there boost harness I installed although on hard accel from a stop the engine puts out some black smoke. If I feather the throttle it doesn't.
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Old 05-29-2014, 06:13 AM   #18
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My C13 on my Magna averages about 6.2 mpg. This is on level straight with no wind to driving in eastern mountains (NC and Tn.) in poor conditions. I put my cruise on 62 and just drive. If I look at just a straight, level run with little wind and low humidity I'm sure I would be near 8 mpg, but that is just not realistic as over 1500 miles (our last trip) I NEVER have these conditions over the entire trip. I believe the average mileage is much more accurate for evaluation purposes.
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Old 05-29-2014, 09:58 PM   #19
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I guess I shouldn't (and don't) complain about fuel mileage considering I have a ACERT C15 in my 48000 lb truck conversion with a 2010 Silverado in tow.
Keep in mind the C15 is 20% larger displacement than the C13 (928 ci to 762 ci)
I drive this at posted speed and at 75 mph it is taching 1500 rpm which is 150 above the sweet spot. Yeah 1350 gets me .4 mpg increase but then I become one of those rv's holding up traffic-no thanks.
I love people talking mileage and comparing this to that. As someone recently posted, remember conditions, weight, weather, traffic, summer/winter fuel, everything effects mileage.
If mileage is the end all to be all-lets get the VW diesel and sleep under the stars-PASS.
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Old 05-29-2014, 10:31 PM   #20
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What exactly did you install, and from whom did you buy it?
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Old 05-29-2014, 11:34 PM   #21
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Here is what I bought-


It is a wire harness that fools the ECM into adding more low rpm boost.

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Old 05-30-2014, 07:44 AM   #22
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G Shaw, I knew what I was getting into when I bought my Panther with the Kitty motor. I agree that some people go overboard worrying about fuel mileage and I am not one of them. Physics tells me that no matter what I do 40k lbs plus my toad pushing a ton of air at 60mpg with a 525hp engine is going to hit me hard I the wallet. I am just looking for that little tweak to save some money so I can buy my next motorhome accessory such as the Silverleaf VMSPC. I love your rig, always wanted one of them but couldn't find what I was looking for when I bought this one.
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