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Diesel Conversions Convert gas to diesel, or convert to a 6.2/6.5/Duramax/Cummins/Navistar/Isuzu/Perkins/Detroit/or ... diesel engine. Go here to see completed projects, works in progress, share your conversion or ask the experts.

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  #71  
Old 07-29-2016, 10:49 PM
BigRabbitMan BigRabbitMan is offline
FMC Cruiser
 
Join Date: May 2007
Location: Dixon, CA
Posts: 84
Default Mileage update

In the above post I mentioned that I was going to a rally in Carthage, MO from my home in Oregon. Well, I went to that rally and then continued on to the East coast including SC and Virginia, on up into Canada through Detroit, then back via MN and South Dakota. In all, from my door back to my door was 8,424.6 miles! It was a great trip and it gave me a chance to drive the coach extensively under different conditions and see how it performed.

It met all of my expectations and much more. At my Canada stop, we tweaked the adjustment of the front end elements and got the last of the play out of the system. It now tracks like it is on rails.

Up until the Canadian stop, I ran the Banks tuner on Normal or the stock tune. At that point I changed it to the Economy tune just to see what, if any, difference it would make. Up until that point, I had 11,289 miles on the conversion with an average of 14.02 mpg. From that point home via the northern route with a couple of diversions along the way, the coach averaged 15.08 mpg over that 2,907 miles.

Yes, I am very surprised and pleased to be getting mileage like that in a 15,000 lb. motor home. I will continue to monitor fuel mileage for the next year or so just for the record.

I thank the group for its support of this project,
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Stephen H.
BigRabbitMan
1976 FMC Motor Coach #1046
Formerly 440, now LBZ
Rear engined w/4 wheel independent suspension.
Tow car: 1987 Subaru Brat 4x4
http://www.fmcowners.com/mbbs22/phot...asp?albumid=77
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  #72  
Old 07-30-2016, 02:49 PM
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a5150nut a5150nut is offline
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Join Date: Jan 2001
Location: Knoxville,Tennessee
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Glad to hear of your success. That's a long ways from Morgan Hill where it all started.
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2006 K3500 D/A
94 6.5 4x4 5spd Sold
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  #73  
Old 12-17-2018, 03:46 PM
BigRabbitMan BigRabbitMan is offline
FMC Cruiser
 
Join Date: May 2007
Location: Dixon, CA
Posts: 84
Smile

Time for an update. The coach was running a little warm when climbing hills so I converted the fan to a larger unit and changed the radiator back to the original FMC stock radiator which is a five row brass unit. I can now take 6% grades at 60 mph and not have the temp gauge move at all.

I have also gotten a lot more miles on it as I have now put 48,000 on the conversion in the three years since it was completed. My measured fuel mileage over that distance has settled in at 13.43 mpg. That includes all fuel after the initial fill up.

Driving my coach with the D-Max LBZ and 6sp Allison is a sweet experience.

I am a happy traveler!
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Stephen H.
BigRabbitMan
1976 FMC Motor Coach #1046
Formerly 440, now LBZ
Rear engined w/4 wheel independent suspension.
Tow car: 1987 Subaru Brat 4x4
http://www.fmcowners.com/mbbs22/phot...asp?albumid=77
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  #74  
Old 12-18-2018, 06:16 AM
DieselDavy DieselDavy is offline
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Join Date: Sep 2001
Location: Ft. Wayne, In.
Posts: 448
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Those are some pretty good numbers for as much as that thing weighs!
Enjoy!
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Dave's Diesels:
Sold June, 07 '82 1/2 ton 4X4;340k miles
'97 2 Dr Tahoe, Intercooled,
Kennedy ECM, 4" Exhaust
'02 GMC
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  #75  
Old 12-18-2018, 03:14 PM
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arveetek arveetek is online now
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Join Date: Oct 2001
Location: Granby, Missouri, USA
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Quote:
Originally Posted by BigRabbitMan View Post
In the above post I mentioned that I was going to a rally in Carthage, MO from my home in Oregon. Well, I went to that rally and then continued on to the East coast including SC and Virginia, on up into Canada through Detroit, then back via MN and South Dakota. In all, from my door back to my door was 8,424.6 miles!

If you should ever find yourself coming through Carthage, MO, again, please let me know. I work for an RV dealer here in Carthage, and would love to see your rig.

Casey
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1995 K1500 Tahoe 2 door, 6.5LTD, NP241, 4L80E, 3.42's, 285/75R16 BFG K02's, Kennedy OPS harness, gauges, and TD-Max chip, Dtech FSD on FSD Cooler, vacuum pump deleted, Turbo Master, 3.5" Kennedy exhaust, F code intake, '97 air box, dual t/stats, HO water pump, Champion radiator, Racor fuel filter, 345K miles and running strong!
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