I just finished visiting with a guy who has been in the bus charter business for 50 years, he has run from 3 to 60 buses at one time. Most all the 50 years he did most of the repairs and maintenance himself (although not after it went from 10 to 60 buses).
The buses he had experience with were Flxible's, 4104,'s(I still have one of his fleet of 4104's) 4106's Eagles, MCI 9's' Van hools and Setra,s. The fleet now has mostly MCI J's.
As you can imagine he has had experience with many types of engines. As I have a 8v92T in my MCI 9 I wanted his input. His thoughts were the 8v92T was a fabulous engine running in a tug boat 24/7 high rev's day and night and would last as good if not better than anything out there. When they ran this engine in buses from California to Miami you could get close to a million miles out of an engine. But with stop start and lots of idling they would not be at temperature (190 deg) and this would take 80% of the life of a 8v92T. He said the fuel would wash down the cylinder walls and cause hugh problems.
Cliff has mentioned not to idle for long. MY idling days are over.
John
On my first truck in the early 80's, I had a 8V-92TA 435hp and got 500k miles on it before overhaul. But-there was also one cylinder head replacement (one lifter broke and couldn't be repaired), a water pump, fuel cross over lines, two bearing replacements, blower and turbo rebuild, set of injectors. Needless to say, the 2 strokers do run a long time, but need to have a scheduled maintenance done on them to achieve that.
On the other hand, 4 strokers can and do go 1 million miles before overhaul with maybe one water pump, one injector and one bearing replacement. Plus much better fuel mileage and pulling power.
Detroits new DD13 is rated as a 1 million mile engine. While the DD15 and DD16 are considered to be 1.2 million mile engines (B50 life- meaning 50% will get to that figure). Good Luck, TomC
Tom C
Then there is hope for my 8v-92T.
Thanks
John
For a two stroke in an RV application, I would run it hard when it's running, and turn it off when it is not. Other than building air and cooling down the turbo after a long hard pull, there shouldn't be much idle time. But then again, I'm not really a two stroke kinda guy, except for old motorcycles.
Howdy John ;D Heres another cool application, it's the new M- 1070HETT, powered by!... A sweet 8V92TA-90, your tax money hard (and I do mean HARD! I should know ;D ;D) at work ;)
http://tlc.discovery.com/videos/mega-machines-m1070-equipment-transporter.html (http://tlc.discovery.com/videos/mega-machines-m1070-equipment-transporter.html)
That military heavy haul tractor is now in its' second generation that uses a Cummins ISX since the 8V-92TA is "no longer made". Good Luck, TomC
Went to Oshkoshdefense.com to view the military trucks, and I stand corrected. First, they are still making some of their trucks with 8V-92TA, and the big tank haulers now use a Caterpillar C18 at 700hp with an Allison 4800 series 7 spd (6spd with an extra deep 1st gear). So obviously, Daimler Corp is still making the 8V-92TA for military use. Good Luck, TomC