Jayco RV Owners Forum

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Old 12-29-2010, 07:24 AM   #11
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Join Date: Jun 2010
Location: Saskatoon Sask Canada
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Originally Posted by SmokerBill View Post
All hand calc. The overhead (in the dash in mine) is always giving me an extra mile or two per gallon. So when will the mileage start improving? I heard after 30 or 40k it should start getting better. And as far as adding the box, I don't want to lose my warranty. I think Dodge is kind of picky about mods.
To deny warranty they have to PROVE that it was what you added that caused the failure... They may try to deny but most judges have already ruled on this one

2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 765 watts of solar, 6-6 volt batteries (696 amp hour), 2000 watt (4000 surge) whole house inverter.
140 days boondocking in 2016
211/2015, 196/14, 247/13, 193/12

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Old 12-29-2010, 07:32 AM   #12
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Proble is you will not gain much (maybe 0.2) MPG once it broke in. The problem is the EPA tune in the computer retards the timing and make the numbers poor. Then the DPF goes into Regen it just dumping raw fuel in the exhaust manifold to burn the DPF clean (big loss in number).

Most people I've talk to about the Dodge Trucks (6.7L) seem to gain the most by ditching the DPF & EGR... But you going to have to wait for 100K miles before you think of that...

Like myself I held out till about 95K miles and said "Screw It" Drop a Edge Comp, BHAF, Striaght piped it went from 16-17 to 20-21 MPG... Now with the RV275 injectors I gain just a touch more...

Right now I'm working on a winter time mod to help fool the ECM to believing it summer out and hold the timing more advanced for the cold weather folks so far I got a few beta test going so we'll see how it goes...

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Old 12-29-2010, 09:34 PM   #13
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Location: North Idaho/Arizona
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Our 6.7 is our second Cummins. Our 5.9 would get 19 empty and 11 pulling our 32' Mountaineer, it had an Edge EZ box and big exhaust. The 6.7 now has 33k and it gets 10 pulling, and around 18 empty. If we buy the Jayco TT I would expect to get about 11mpg. It has a lot lower profile than the 5er and will be about 1000lbs lighter. I have only experienced 20mpg with a Cummins twice.

2011 Eagle 330RLTS with just about every option.
Dodge SRW 1 ton Cummins powered.

I was born with nothing and I still have most of it left.
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