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Author Topic: Up grading to bigger detroit  (Read 5439 times)
musicman
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« on: May 27, 2007, 03:37:41 PM »

I have a mid 80s Eagle with a 6v92 and when I'm running along I see those new Prevost whiz by me like I'm tied to a tree and I'm running 70-75 mph...I want to upgrade to a 60 series Detroit or a 400 Cummings or something  So I'm not eattin Prevost dust from now on..I cant do it now because of the time it will take, But I want to do my home work and get things lined up before I start..Which is the best engine to swap it with and just how big of a job is it...I have alot of help from Classic coach,Star coach and a few bus mechanics here local in Lakeland Florida..Any advice would be greatly appreciated
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Utahclaimjumper
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« Reply #1 on: May 27, 2007, 03:50:15 PM »

You can certainly do most anything with enough MONEY!!!>>>Dan
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Utahclaimjumper 
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musicman
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« Reply #2 on: May 27, 2007, 03:52:44 PM »

Well when I bought the bus it wasnt about money it was about having fun..Im having fun with less money now....lol...I know its expensive but its my baby and she deserves the best
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Bosshosssport96
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« Reply #3 on: May 27, 2007, 04:13:40 PM »

70to75MPH,and you want to go faster????Do what what Dan did,propane inject it,and then hang on...........Frank
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musicman
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« Reply #4 on: May 27, 2007, 04:18:27 PM »

Well to be honest some of you know I work for a country artist and her personal bus is a Prevost with a 60 series and they always leave me behind and Im tired of it ...I wanna run with the big boys now Dang it..That 6v92 is a stout engine but she cant hang in there..Our tour season is over in Nov and we wont go back out til March So I want to surprise them...lol
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Dallas
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« Reply #5 on: May 27, 2007, 04:52:34 PM »

Well, If money were no object,

And a lot of wishful thinking,

How about a Cat 3408BTT? (597 HP) Match it up to a RTLO20913A (.86 OD) then change your rear gears to to 2.73:1

That way, you could run with the big dogs, while pulling a couple of them on chains while they're brakes were set.

Your top end with 43" diameter tires would be 86mph @ 1500rpm. Of course, you could pass anything on the road but a fuel stop! But, Hey, If we're gonna dream, lets dream BIG!

Dallas

GO BUSING!
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musicman
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« Reply #6 on: May 27, 2007, 05:12:42 PM »

I thought about a cat..But finding the engine is the big problem,Even If I had to rebuild it myself..I honestly prefer to build it myself that way I know its done right..Money is a option here,But this bus is my hobby,My job (since I refuse to travel in a band bus) and its my relaxation..Some have ATVs some have mud truck and sand rails ..I just happen to have a bus...lol..I dont wanna go over board but I do want them to know something has changed
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bus05eagle
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« Reply #7 on: May 27, 2007, 05:21:59 PM »

build you a 600 hp 6v92 like the boats have won't last long but it would be fun
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busnut104
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« Reply #8 on: May 27, 2007, 05:50:41 PM »

How about a 500hp. 8v92.
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musicman
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« Reply #9 on: May 27, 2007, 05:59:00 PM »

An 8v92 is an idea but how do they match up to the 60 series?
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Connel
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« Reply #10 on: May 27, 2007, 06:26:33 PM »

"how do they match up to the 60 series?"
Not even close - go with a four cycle engine.  The Ser 60 is a million mile+ engine.  There fuel mileage is better than the CAT also.
I have an AutoShift 10 spd you can put behind the Ser 60 for excellent fuel mileage.
IMHO
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Central Oklahoma

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HighTechRedneck
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« Reply #11 on: May 27, 2007, 07:04:48 PM »

I guess the only thing I would add to the ideas already stated is to be sure to beef up the brakes to go with it.  Getting 36,000+ pounds from 0 to 86 takes some serious horsepower and a good set of gears.  Getting that same 36,000+ pounds from 86 to 0 in a critical situation takes some very serious brakes, and a change of clothes.  Wink
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Dreamscape
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« Reply #12 on: May 27, 2007, 07:08:10 PM »

I just smile and wave.... Grin

Paul
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Brian Diehl
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« Reply #13 on: May 27, 2007, 08:09:53 PM »

I'm doing a Cummins ISM/Eaton Autoshift conversion to my 96A3.  The Cummins is a lighter and physically smaller engine than the S60.  However, it is also ~600,000 - 700,000 mile engine compared to the S60 at over 1,000,000 - 1,200,000.  Both engines have gone longer before overhaul ... but that is about average.  The S60 I've heard can be pumped up to over 600 hp while the Cummins is good to 500 (in RV trim only).  My particular 2000 ISM good to 450 hp if I choose to have the program burned into the computer. 

One thing to note .... a re-power is a lot of SERIOUS hard work and time.  Double any and every estimate if you hope to estimate the time and dollars even remotely close to what it will actually take.
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prevost82
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« Reply #14 on: May 27, 2007, 09:15:57 PM »

Musicman ..I have a 500hp 8V92 in a 82 prevost and I top out around 75 MPH with the stock diff 3.7:1.,  it would handle 3.5: 1 diff  ratio with a 4 speed but not much higher, I have a 6 speed stick in mine. The newer Prevosts are run 6 speeds so they came run at 90 to 100 MPH and still start off the line. So I think you have to look at the total picture engine / tranny / diff ratio. I would do what Brian did and go with a ISM / 10 speed autoshift with 10th gear as a OD.
Ron
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