Changing bus ride characteristics

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Changing bus ride characteristics

Home > Discussion Forum > Bus Conversions - School

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All Messages in Thread	Author	Date
Changing bus ride characteristics	Tom Dangelo	6-8-02
I decided to start another header to reduce the length of the thread on the last one. I have a 22 foot Grumman Step van which serves as my traveling Locksmith Workshop. When I was having some difficulties with the ride I decided to see if there were some alternatives, There is a Place in Tacoma Washington called Right Way Spring company, which deals with springs for Big Trucks, Buses and other larager vehicles. It may be worth your while to see if there is something similar in your area so that you could aske them about alternatives to what we now deal with in our buses. I have a short, 25 foot International Model 1603 School Master, that I am currently working on. I chose a small one because I am comfortable driving my Grumman every day and thought 3 addditional feet would be no big deal. I have just had the machine work completed on an Internation IC392 that is going to go into the bus. I had it bored, line honed, decked, balanced etc. I am currently porting the heads, exhaust side, to improve the scavanging effect of the exhaust system. I have had a special cam ground for it. The came was specifically developed by Cam Craft for International School buses. It was a project that they had been commissioned to do for a production engine builder who was remanufacturing International Engines for the North Carolina Schoold Districts. They have a lot of mountains that they have to transverse and the school districts were complaining that there buses did not have enough torque or grunt if you will to haul a bus load of students at normal highway speeds. (I know that is the argument for diesels but I am a "gasoholic". haha). I have a 5 speed transmission and am about to order a remanufactured 5.29 "third member" so that I can cruise at 60 and turn 2900 rpm. This is the effective torque curve/HP peak of the engine that I am building. I will keep the board posted of my progress,
Re: Changing bus ride characteristics	Johnny	6-10-02
Sounds cool! Is it a manual trans or a slushbox?
Re: Changing bus ride characteristics	John the busboy	6-12-02
Sounds like a neat project. That engine should really do an excellent job. It would be nice to hear what sort of mileage you get. We have a 6.14 third member, and an Allison 545. For us 2900 prms equals 55 mph. Our tire size is 11R22.5, 504 revs per mile. Don't know how much slippage there is in the torque converter. It would be nice to find a spring company that can engineer springs as opposed to just replaceing them. John the busboy
Re: Changing bus ride characteristics	Tom Dangelo	6-10-02
I am putting a close ratio 5 speed in it with a change in rear end ratios to 5.29. This will allow me to do the 60 mph ar 2900 rpm. Then after this is accomplished I will have it painted. Then I will be able to commence on the interior. Tom the Locksmith