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Author Topic: Engine Question  (Read 856 times)
5B Steve
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« on: January 15, 2013, 09:05:09 AM »


  Hello,

  I thought I might ask , would a rebuilt 8V-71T truck engine work in a bus and is there any changes that need to

  be made. The reason that I ask a friend of mine would like to replace the engine in his bus.

  Thanks in advance.

  Steve 5B......
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TomC
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« Reply #1 on: January 15, 2013, 11:44:07 AM »

No real differences between a truck and bus engine except-the bus engine typically had smaller injectors. The truck 8V-71N had 318hp and 860lb/ft torque. The Bus 8V-71 had 270hp and 730lb/ft torque. Same with 8V-71T (non aftercooled). Truck was 350hp and 930lb/ft torque. Bus is 304hp and 800lb/ft torque. Depending on if you have an automatic or manual is what you should run. Better startability with an automatic, hence larger injectors work well with the automatic. Good Luck, TomC
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Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
Sam 4106
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« Reply #2 on: January 15, 2013, 01:17:20 PM »

It depends on what brand bus it is going into. A truck engine wouldn't be usable in a bus with a crossways 8V71, they require a left hand engine. In some buses an 8V71T truck engine would require a lot of modification to work. No easy answer until you tell us what bus the engine is going into.

Good luck, Sam
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1976 MCI-8TA with 8V92 DDEC II and Allison HT740
RickB
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81 MCI 9 smooth side 8V71 Allison 754




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« Reply #3 on: January 15, 2013, 03:34:42 PM »

If it's an MCI Bus you will need a different bellhousing or you'll have to switch to a belt driven alternator in the front. Obviously, if you're pulling  it from a truck with a manual transmission and putting it in a bus with an automatic you'll need a flex plate and quite possibly a different bellhousing as well

RB
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I will drive my Detroit hard... I will drive my Detroit hard.
bevans6
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1980 MCI MC-5C




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« Reply #4 on: January 16, 2013, 04:46:09 AM »

Read my project page on military engines to see what some of the issues might be, if it's an MCI bus.

Brian
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1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Spicer 8844 4 speed Zen meditation device
Vintage race cars -
1978 Lola T440 Formula Ford
1972 NTM MK-4 B/SR
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