MC8 that says Remanufacturers 1998

[Sebulba]

Get an MC9 1982 or later, after the change to integral style power steering.

You really don't want the ram assist in 2021... and you really don't want to have to source the parts to upgrade, at this late date...

MC9 with a tuned up mechanical 6V92 would be a lovely blend of economy, power, and difficult to overheat.

Happy coaching!
Buswarrior

Hello BusWarrior,

I like the way you think.

So what are your thoughts on a 1989 with an 8v92.  I'm guessing you're going to say less efficient and harder to keep cool.

My thought: We like mountains, think the 8 would better.

Anyone?

Thanks

Seb

[lvmci]

8V92 is the hardest to keep cool, and you would have to get the thicker radiators upgrade to begin with. What about a 12?...

[Sebulba]

8V92 is the hardest to keep cool, and you would have to get the thicker radiators upgrade to begin with. What about a 12?...

Of course, 12s are good.  Just exploring possibilities as I find listings.

Radiators?  How much are they and how long/hard are they to replace.  I learned that Prevost's are a lot if labor.

Thanks

Seb
Of course 12s are good

[hogi6123]

This is interesting because I have a 1981 MC-9 with an 8v92t.  At least that's what the current VIN tags attached to it say.  I know very little about its history.  Last year I drove it over the mountains and had no trouble with overheating.

Also I am pretty sure the power steering is the "new" version.

I have had it listed for sale online for a few weeks.

One person sent a message "would you take x dollars" a very low number.  No other inquiries.

I am wondering what I need to do find someone that would want to buy it. Take better pictures?  List it somewhere other than Facebook?  Reduce my asking price?  Include in the listing that it has no problems with power steering, or overheating?

Any insights would be helpful.

[lvmci]

I got 2 new 8V92 big radiators from MCI, something happened in shipping. A forklift accident and MCI  replaced the new damaged one, for free. When I took out the newer old radiator, the fins were rotting out in a difficult to detect area, would have been a bad failure. It was just a little more expensive, less than shipping from other companies. lvmci...

[luvrbus]

The 8v92TA MCI used was low HP 350 to 365 hp with tiny injectors you bump one up to 425 to 475 hp they are a bear to cool in a MCI with the tiny side mounted radiators ,DDEC versions are not as hard to cool it takes the driver out of the picture and has a mind of it's own  lol they do heat huh LVMCI 7070

[buswarrior]

They all slow in the mountains.

Busnuts have spent tons of money on drivetrains, and find themselves climbing only 5 mph faster than before they started, and burning a lot more fuel for the inadequate improvement.

Those busnuts do not get on here to brag about their experience...

As luvrbus notes, MCI kept the horsepower down on the stock 8V92, to keep it reliably cool.

I would find the bus with the best all around combination of clean body, life left in the drivetrain, mechanical condition, some previous history/records, minimum of rust.

What ends up in it for a drivetrain will "just do it" no matter what it is, for a busnut.

Happy coaching!
Buswarrior

[Sebulba]

The 8v92TA MCI used was low HP 350 to 365 hp with tiny injectors you bump one up to 425 to 475 hp they are a bear to cool in a MCI with the tiny side mounted radiators ,DDEC versions are not as hard to cool it takes the driver out of the picture and has a mind of it's own  lol they do heat huh LVMCI 7070

That makes sense.  So essentially the 8 is tuned down, so probably not a lot of gain over the 6.

Thanks for the input

Seb

[Sebulba]

The 8v92TA MCI used was low HP 350 to 365 hp with tiny injectors you bump one up to 425 to 475 hp they are a bear to cool in a MCI with the tiny side mounted radiators ,DDEC versions are not as hard to cool it takes the driver out of the picture and has a mind of it's own  lol they do heat huh LVMCI 7070

How can you tell. DDEC version?  Did those start in a certain year?

Thanks

Seb

[buswarrior]

DDEC has a metal computer box mouted on the top of the engine, and no mechanical fuel controls for throttle and shut-off.

Started showing up later 80's.

Of course, all bets are off, if re-engined.

Happy coaching!
Buswarrior

[Sebulba]

DDEC has a metal computer box mouted on the top of the engine, and no mechanical fuel controls for throttle and shut-off.

Started showing up later 80's.

Of course, all bets are off, if re-engined.

Happy coaching!
Buswarrior

Thank you.  I will watch for that.  The one that prompted this thread is a 1989, so probably a DDEC model.

So, would say this is "drive by wire" -- no throttle cable/rod or such?

My initial impression is that I'm often hesitant about anything that takes control away from me.

With that in mind, can this be bypassed, at least in emergency or test situations.

Will explore the ins and outs of this.

Thanks again

Seb

[6805eagleguy]

They all slow in the mountains.

Busnuts have spent tons of money on drivetrains, and find themselves climbing only 5 mph faster than before they started, and burning a lot more fuel for the inadequate improvement.

Those busnuts do not get on here to brag about their experience...

As luvrbus notes, MCI kept the horsepower down on the stock 8V92, to keep it reliably cool.

I would find the bus with the best all around combination of clean body, life left in the drivetrain, mechanical condition, some previous history/records, minimum of rust.

What ends up in it for a drivetrain will "just do it" no matter what it is, for a busnut.

Happy coaching!
Buswarrior

Bw is normally right, for anyone reading this. However I will say my s60 swap was completed for cheaper then totally rebuilding an 8v92, and transmission, and now slowest I’ve been thru several mountain ranges with toad is 50mph. Doing really good on heat so far, on flat in Nebraska we can’t get hotter then 185. In the mountains I’ve seen it run up to 205 and stabilize. I’d like to install a fan clutch next. Any suggestions on brand or model?

[buswarrior]

Bw is normally right....
I’d like to install a fan clutch next. Any suggestions on brand or model?

Far from normal... but I'll take what i can get, thanks!

With an Eagle, you still have that gear box?
Check out the fan drive in an E or J MCI, belt to a shaft to a gear box. The Horton fan clutch is at the belt/shaft interface.

Doesn't have to go at the fan...

Happy coaching!
Buswarrior

[rusty]

Mason this is the fan clutch setup in my 15
Wayne

[luvrbus]

 I would go with the newer hydraulic drive fan, the CC is the 1st RV I ever had with the hydraulic fan and I am loving it,the only thing I do not like is when the rear and dash compressor driven AC is on it defaults to high speed