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Old 11-11-2010, 09:33 PM   #1
Skoolie
 
Join Date: Aug 2007
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my 9.o wont get me above 50 mph

see my post in the conversion discussion section im beat my bus is so slow its unsafe

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Old 11-11-2010, 10:27 PM   #2
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Every thing in life is a trade off

Most buses are built for the area that the bus will be used. You can make any bus go 100MPH. Ya gotta spend some money. There are no buses that are unsafe at 50MPH. Maybe it is the driver that is unsafe. Please post some good information about your bus. There are many solutions. I have many unused answers. Frank
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Old 11-12-2010, 10:02 AM   #3
Skoolie
 
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Re: my 9.o wont get me above 50 mph

well its an 85 with 185k on it. 9.o na with an AT545. 32 footer so i assume that the 3/4 size. when i bought it it would only go 45 max..took off governor no change..
.so i figured if i switched the rear end ratio id be able to get a higher top speed on the flats knowing that itd be slow on hills but mostly i cruise cross country on interstates. the original rear ratio was 5.57 and it had split wheels. well my junkyard buddy hooked me up with a deal......a complete axle assembly.with only 20k miles on it...leaf springs air pots new budd wheels brand new rubber on all four wheeels all for 1500.
so i felt it was an awesome upgrade. safer more modern super low mileage etc all for 500 dollars more than the replacement rear gear for my original pumpkin would cost.
oil change all new filters replaced gaskets to stop oil leaks. the other difference besides axle ratio is the outer diameter of the tire is more modern standard..24 i believe i need to go check.
also i baby it. i go low rpm on hills and dont push it. i keep it below 27-2800 and since have owned it not gone over that religously...
so i dont know whats up. my uncle is a big rig mechanic albeit a grumpy one who cant be talked into working on it even for mony but he did go for a fifteen minute test drive (not on the highway but rural without any big hills) and says it sounds good and seemed to be running good

still has 22.5 tire in front and 24s in rear so it looks like a gasser hot rod
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Old 11-12-2010, 11:07 AM   #4
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Re: Every thing in life is a trade off

Quote:
Originally Posted by frank-id
... There are no buses that are unsafe at 50MPH. Maybe it is the driver that is unsafe...
A vehicle that doing 45 to 50 mph on the interstate is unsafe. I have seen slow moving vehicles get pulled and ticketed for "driving too slow".
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Old 11-12-2010, 11:17 AM   #5
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More information needed

It looks like ya have a 9.0l diesel engine. How did ya remove any governor? Most diesel engine governor is a major part of the fuel system, not to be removed.
You did not make me understand why bus is unsafe. Your bus improvements are great. My Crown bus has 24.5 wheels in front and 22.5 in the rear. It is very difficult to notice the change. You now just need a bit more power. The obvious choice is a turbo. Also you can add alcohol/water, nitrous gas or propane injections into the air cleaner for an improvement in power as well as economy. On most Allison trans, the shifts can be changed to a bit higher RPM, so the engine does not drag down after a quick shift. frank
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Old 11-12-2010, 11:39 AM   #6
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Int 9.0 engine

TAG NUMBER MAN. / MODEL YEAR SERIAL / VIN DESCRIPTION PRICE / CORE SELLER INFO CITY
37063

More Info INTERNATIONAL
9.0 DIESEL - - USED: IH-4034, 9 Liter
HP: 165 Price: $3000.00
Core: $500.00 WM. Cohen & Sons Thorndale, PA
1134

More Info INTERNATIONAL
9.0 DIESEL 1987 1HTLCHWP7HHA13905 USED: 9.0L Diesel @ 175HP-Mileage=335,107-Hydraulic Brake Application
Horse Power: 175 Jake: NO Price: $3000.00 Specialty Truck Parts Inc San Jose, CA
27077

More Info INTERNATIONAL
9.0 DIESEL 1986 1HTLCHXM3GHA65096 USED: OIL PSI COLD 65 PDI, OIL PSI WARM @ IDEL 30 PSI, OIL PSI WARM @ 1,500 RPMS 50 PSI , NO SMOKE NO BLOWBY, RUNS GOOD
Jake: NO Miles: (168520 SPEEDO) Price: $2500.00
Core: $500.00 Kadinger's Heavy Duty Trucks & Parts, Inc. Downing, WI
S95497

More Info INTERNATIONAL
9.0 DIESEL 1986 1HTLCHWM2GHA61686 B: 9.0L 175HP. Outright - no core due. Need to dyno for full report.
HP: 175 Jake: NO Price: $1850.00 LKQ Valley Truck Parts & Equipment Fresno, CA
S95476

More Info INTERNATIONAL
9.0 DIESEL 1987 1HTLCHWM9HHA25379 B: 9.0L, ENGINE RUNS. OUTRIGHT-NO CORE DUE. NEED TO DYNO FOR FULL REPORT.
HP: 175 Price: $1850.00 LKQ Valley Truck Parts & Equipment Fresno, CA
S95425

More Info INTERNATIONAL
9.0 DIESEL 1982 2HTAA17E0DCA10198 B: Intl 9.0L. Outright - no core due. Need to dyno for full report
Jake: NO CPL/ARR#: N/A Price: $1850.00 LKQ Valley Truck Parts & Equipment Fresno, CA
391

More Info INTERNATIONAL
9.0 DIESEL 1987 1HVLPHWL0HH491878 USED: ENG.LOCKED UP FOR PARTS ONLY V-8 Price: $1000.00 DJW Equipment Sales, Inc. Gridley, CA
Contact Info INTERNATIONAL
9.0 DIESEL 1985 - 1985 As many as 1 additional unpriced parts available. Contact this facility for more information. Please Call Specialty Truck Parts Inc San Jose, CA
Contact Info INTERNATIONAL
9.0 DIESEL 1987 - 1987 As many as 1 additional unpriced parts available. Contact this facility for more information. Please Call DJW Equipment Sales, Inc. Gridley, CA
Contact Info INTERNATIONAL
9.0 DIESEL 1985 - 1985 As many as 1 additional unpriced parts available. Contact this facility for more information. Please Call New York Truck Parts, Inc. Wurtsboro, NY
Contact Info INTERNATIONAL
9.0 DIESEL - 1983 As many as 2 additional unpriced parts available. Contact this facility for more information. Please Call Vander Haags Inc Sp Spencer, IA
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Old 11-12-2010, 12:36 PM   #7
Skoolie
 
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Re: my 9.o wont get me above 50 mph

wow
idid remove the governor and nothing happened good or bad. unsafe and illegal just because its so slow i feel. v\\im a good driver i drove flatbeds for a sprinkler company and school buses for over six years now no problems im also a very defensive driver leaving too much room etc for prevention etc.

where did you find the info on engines for sale, tho interested.
seems like i should just fix mine or just buy a whole new running bus for that price tho. im planning on switching to another engine anyway but not another 9.0 more like a 3208 or a dt466.
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Old 11-14-2010, 09:38 PM   #8
Skoolie
 
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Re: my 9.o wont get me above 50 mph

Two questions first. What rear axle RATIO did your new rear end have? And when our out cruising at 2700 rpm, will the engine hold that rpm, or does it fall off pretty fast when you come upon a slight hill? One way you may be gear bound or you may have a power problem. Tho you got a smoking deal on the rear end, it needs to be a faster ratio then the one you took out.
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Old 11-19-2010, 08:29 PM   #9
Skoolie
 
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Re: my 9.o wont get me above 50 mph

well same axle series just brand new and different ratio. not it took me actually a year off and on to actual drive at highway speed so i cant remember exactly but i feel its not much better. but the original was a 5.57 and the new one is a 4.44
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Old 11-19-2010, 08:44 PM   #10
Skoolie
 
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Re: my 9.o wont get me above 50 mph

someone suggested a power problem ? or a "gear vendor" not sure what that is.... if i have a power problem how does one recognize a loss of power and remedy it. it basically slows down pretty fast when i hit a hill and sometimes can literally slmost stall out near the end of it. there were a few that i almost didnt make it
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Old 12-14-2010, 10:32 AM   #11
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Re: my 9.o wont get me above 50 mph

Saying that a 9.0L doesn't have the power to do above 50 on flat ground is a myth. They are no power houses by any means, but our scout troop used to have an '87 with the 9.0 that would do 75 on flat ground if you let it. This was a bus that was fresh out of school service with no modifications at all. If you want I can find out what gearing the thing had, I think it was fairly high. Also, on hills you should try manually downshifting the allison into third or second. Those old allison's are stubborn to downshift, and that does not mix well with a naturally aspirated diesel. We found that doing this made a big difference.
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