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Old 02-25-2012, 06:11 PM   #15
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Thanks for the brief engine history lesson. It sounds like if I consider a coach with an older DD in it, I should try to find out where in the Penske improvement plan it fits to get an idea of what sorts of problems I might have. I have seen a few coach ads that say the coach has a Series 60 in it, but not many in our price range. They may be too new for us.

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Old 02-26-2012, 10:22 PM   #16
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Most of the old bus conversions use the Detroit 71 and 92 series engines, 8V71, 8V92, etc. Good reliable engines, if you can tolerate the oil leakage and fuel slobbering.

Later bus conversions use the Detroit Series 60 engine. This era of bus conversion is still quite expensive.

Most diesel pusher RVs use 300 to 400 HP engines, mostly Cummins and Cat. In some of the larger, heavier higher end RVs, Cummins and Detroit offer engines in excess of 500 HP.

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Old 03-18-2012, 08:49 PM   #17
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I absolutely loved the fuel sipping Detroit 60 series in the 2000 Freightliner that I once owned!

I see it quite often powering workover rigs, cement, and frac units in the oilfield.
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Old 05-08-2012, 06:27 PM   #18
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I have an 8v92 and i can't quite get 6 mpg
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Old 05-08-2012, 08:14 PM   #19
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At risk of upsetting some DD owners, I had 60 Series in some OTR trucks. I would sooner have a sister in a house of illrepute than own another one of them.
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Old 05-16-2012, 11:07 AM   #20
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Why do you want your sister to work in a hose of ill repute????

Why do you say that about the DD S-60?
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Old 05-18-2012, 07:37 PM   #21
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Alot of the old 92 series and 71 series before that were used for stationary power plants as well as truck engines. I ran several 871's and 892's and for the most part they were a gutless engine that was screaming at you all day long. They were harder to crank the power up on than a cummins, but it could be done. I had a 8v92 with the big injectors and a pump from a v 12. It was putting out around 500 hp. It actually got better fuel mileage after it was cranked up. Every one of them was a oil leaker and you had to add oil daily. In a motorhome application you would have to consider the oil leakage and the excessive noise factor. I listened to that screaming for too many years to want to hear it in a MH.
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Old 08-16-2012, 08:13 AM   #22
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Running 15 OTR tractor trailers with series 60, 12.7 and 14.0L. the Detroit series 60 12.7 is the best motor on the market, to me anyways, great fuel economy, parts are cheap, and they are easy to work on. Yes they develop oil leaks just like anything else, but keep up on the maintenance and you Wont have issues. The 14.0L have EGR and are deff not as desirable. Freighliner builds gliders with 12.7 detroits in them because they are so desirable in the market, I've had cats and cummins, both had major problems all the time as well as poor fuel economy and cat parts are flat out a rip off just because the name. I would love to find a bus someday with a 12.7 series 60.
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Old 08-16-2012, 08:20 AM   #23
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The Bluebirds and Prevosts out of the 90's had the 12.7 DD in them. Also no EGR. I wish I didn't have the EGR on my 14.0L but at least I don't use DEF
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Old 10-07-2012, 07:00 AM   #24
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I drive a heavy haul truck forva living, have for years and am vaguely familiar with big diesel powerplants. My latest truck has the Cummins 600 Signature, its a 2012 model with the whole EGR system and in a years time the truck has had a little over two months downtime, mostly because of tge DPF getting clogged. When you smell antifreeze burning, somehow it winds up there.

In my mind, a bus/mh with a non EGR system is the way to go. Yes, those old Detroit Diesels may have marked their spot, but were strong as heck. And in a non commercial application like a motorhome, one would have to very seriously abuse the motor to do significant damage, and if you did, the motors are so simple and easy to rebuild.

I am a full timer and looking for a new old bus conversion, I am willing to trade a little fuel economy for a power plant that I know is stronger than I will ever need, and should outlast me!
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Old 10-09-2012, 04:55 AM   #25
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I own a 1990 37' Crown Chassis built by Mitchell a Prima Vista with a V8 3208T Turbo Cat 300 HP. Does anyone else own a Cat and if so what problems can I look foreword to in the future. I know coming up the Baker grade the temp got up to 220 deg and bells and whistles went off, so I pulled over to the side of the road and let her high idle to bring the temp down. The trans temp read 160 deg which I figured was okay. I started off again moving at 45 mph until I got to the top of the grade, once there on the down hill side she cooled down to 190 deg all the way home. Is this normal for Cats? The engine oil was full and tranny. I think I'm going to drain the coolant and change the thermostat in her and make sure her coolant full. I'm open to suggestion and helpful ideas.

1990 37' Vogue Prima Vista DP
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