Engine Comparisons

[luvrbus]

Jim, the series 60 and B500 you mention is a hard combination to beat in a bus for power and fuel mileage. Plus service is so much easier to find for a 60 series on the road than a 2 stroke
I like the 8v92 but I am a old school guy but if I were buying it would be a bus with a newer 4 stroke engine and drive train.  


good luck

[belfert]

I get about 7.8 to 8 MPG with a Series 60 11.1 liter 350 HP and a B500.  This is going from Minneapolis to Reno and back.  I have to cross the Rockies twice.  The bus isn't a rocket on the grades, but it do can better than most loaded semis.  I have gotten closer to 9 MPG on a trip out East where I had to drive slower with no big grades.

A 102D3 may have the larger 12.7 Series 60 with 400 HP so it will climb the grades better.  A 102D3 is also 3 feet shorter than my bus so it may be lighter too.

[Zeroclearance]

With my S60  12.7 ltr 500HP+  I average between 7.6 and 8.2 MPG > 65 -75 MPH..  I love the B500..

[Lin]

I have my MC5a with the 8v71.  This is what we have, so this is what we will work with for now.  If we were looking to buy another coach, I would not disqualify a two stroke, but definitely would prefer the Series 60 if one could be found in our range.  Regardless of what drove the changes, newer engine technology is generally superior.  However, I would not let that alone stop me from buying a coach that I really liked.

[johns4104s]

Lin,

What type of mpg are you getting?

Thanks

John

[Lin]

John,

The only time I tried to figure it, it was about 8 mpg.  That was with the Spicer and C60 injectors.  Hopefully, by the end of the week I will be taking it for its first drive with an Allison and N65 injectors.  I am hoping that the mileage will improve.  I know that runs against the normal logic, but if the bigger injectors allow me to drive one gear higher, it could happen.  Anyway, I will be real happy if it just doesn't drop too much.

[johns4104s]

I met a mechanic that did everthing he could to get the very best MPG with a MCI 9, He built the engine special, cams,injectors, transmission, I think he said 6v92T, they got 7 MPG max,(that's all he got),So with 480 hp I will have to live with 5+a little.
He was in charge of Dixieland Tours out of Baton Rouge La, about 20 plus coaches.

John

[luvrbus]

John, a 8v92 setup right with the right gearing will get better fuel mileage than a 6v92 or a 8v71 I get 7 to 7.5 every day of the week driving the speed limits. 
Are you in Phoenix we will be there Sat. 


good luck

[Just Dallas]

Removed

[luvrbus]

Dallas, sounds like John needs a fuel modulator the 3 reasons I find most don't get decent mileage you pass by the bus they are setting there running on fast idle for a hour or so a day they will use 5 or 6 gals a hour on idle and that is never factored in on the mileage,  people run down the road with the Jake hot all the time and like you say no air.
Most conversions I see from a 8v71 to 8v92 people are still using the 900 cfm air cleaner and same intake from the 8v71 the 8v92 needs 1600 cfm for performance and fuel mileage and the 1600 cfm requires 7 inch piping.
And fwiw I use my King cruise control a lot on the open highway like all the time



good luck

[johns4104s]

Clifford,

Tami and I fly in to Phoenix for meetings on March 7th then fly back out on March 10th, Work Louisiana/South Texas, from March 11th thru April 14th, then we will be driving back to Phoenix (maybe spending 4 days in San Antonio) Phoenix for 4 weeks, then back to Louisiana.
So if you are in Phoenix in April/May we will see you guys.

So what I would do is come out of the air filter ( That will be changed to a 16 CFM) with &" piping and swedge down to 6" to go into the turbo, Correct?

John

[Just Dallas]

Removed

[Ed Hackenbruch]

What about mounting an "electric fan" inside of it to help force more air in?  Sorry, couldn't help myself.

[Barn Owl]

You might be starting from the wrong end of the equation. The type of bus you want and your budget will determine what type of engine choices you will have. More choices with a T-drive vs. V-drive etc. Newer, more HP fuel efficient buses = $$$.  What are your inclinations/limitations at this time?

[TomC]

When I turbocharged my 8V-71, I had to change my air cleaner from 6" to 7", and even then, have to change the filter at 10,000 mile interval. Also took out the big stuffed up muffler (very quiet though) and installed a Donaldson 5" inlet/outlet same side muffler.  Makes for a nice exhaust tone and flows very well.  I believe it was about 18" long.  Good Luck, TomC