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Old 09-22-2014, 08:45 PM   #15
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i agree with everyone,,,the better it can breath the better it will run a good cold air intake and exhaust will help......ive never thought about this on an rv maynot even work but what about regearing yor rearend ,,?..

but i can make you feel a little better,,,i have a 94 wrangler that i have to drop down th 3rd to make it up..and got 8mpgs 10 qtg best....lol....but that thing in an offroad beast,,will climb hills with ease that there is no waY YOU CAN WAlk up them but yes its lifted and i run big ooe tires but still runs like your big motorhome....lol

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Old 09-23-2014, 05:49 AM   #16
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You can regear your rear, but the problem with a ratio change is that it is permenant. If someone is going to go that route, they are much better off to use a Gear Vendors, so that you can choose taller gears when cruising on flat ground. Otherwise the mileage suffers.

'83 Revcon Prince 31' FWD FMCA F298817
502 w/Howell/GM ECM/Edelbrock MPFI,Thorley's & Magnaflows, 4L85E 4 spd, KoniFSD
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Old 09-23-2014, 06:18 AM   #17
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If you can pull the hills between Springfield and Branson at 45mph with a 460 and a toad you are doing dam good in my world!
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Old 09-23-2014, 08:35 PM   #18
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Nope no toad just RV. The regearing is interesting but not sure I want to go that route, think I'll live with holding up traffic, if there's nothing wrong with the motor. I hope to get down there this weekend an take it for a drive. Thanks again for all the help. Thsi is a great place. Jim
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Old 09-24-2014, 06:40 AM   #19
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BTW: Make sure your air cleaner is new. Air cleaners can be deceiving in that the engine will run perfectly fine, but just be down on power.
'83 Revcon Prince 31' FWD FMCA F298817
502 w/Howell/GM ECM/Edelbrock MPFI,Thorley's & Magnaflows, 4L85E 4 spd, KoniFSD
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Old 09-27-2014, 08:44 PM   #20
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It is more important to gear down and watch the temperature gauge. In the summer here in Az. I might only climb hills at 35mph but I make it without overheating and save a little gas also.
I installed a vacumm gauge to help me know how the engine is doing. If you keep the vac. reading as high as possible your fuel mileage should increase.
I'm able to get over 9mph most of the time. Compared to the 6mpg I got when I first got the MH.

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