Did a little run with my new series 50 B400 swap. Went from Vancouver BC to Osoyoos BC . about 250 miles north through the mountains.( Little golf trip with the boys) Sorry Clifford but it is a 100% better than the 6V92 I took out. The 1150 lbs ft of torque was nice. The hills I was climbing before at 30mph, I was doing 45 with the series 50. It is a way quieter, you could hardly hear it running compared to the 6V92. Milage was about 1 mile a gallon better, I was hoping it would be more, and the best thing of all was no oil consumption and the back of the bus was clean.Lol. Man what a difference going from the neck jerking 740 to the B400. awesome! Going to do a longer trip this week and hoping the fuel milage improves as I learn to keep my foot out of it. Cheers Gerry.
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Great it should get you better than 2 mpg fwiw I am not a fan of the 6v92 never have been and never will be lol it should serve you well since you know how to rebuild the balance shafts that's the part I don't like about a series 50 the least bit of wear and they shake the bed sheets of the bed
Ya Clifford it shifted into 5th at 55mph . I don,t think that old gal has ever seen 85 before. Lol Pretty scary at that speed . Cheers Gerry
Sounds great Gerry! I would like to see it someday. If you ever come by Invermere, BC, stop for a visit.
JC
sounds great JC , thanks for the invite. Cheers Gerry
Do you have pictures of the engine compartmemt ?
Thanks,
Ken
I do Ken , just have to figure uot how to post them. Lol Cheers Gerry
Gerry Sounds like a great combo, I met a guy from Merritt that had a102A-3 also with a series 50 . I think it a 740 tranney. If your ever in Vernon drop by.
The Bc Bus Nuts are having a rally in Barkerville on the 13th to 15th of July. If you can make it I can email you the registration.
Gary
Thanks for the invite Gary . I will be at Green lake the week before but unfortunately have commitments and will be heading south towords Osoyoos. Hope all goes well at the rally and the weather cooperates Cheers Gerry
It doesn't seem fair to compare the two engines if the 6V92 was worn out. Was it a 6V92TA with 350HP and 1050 foot pounds of torque? That is what I have and it is smooth, quiet, and doesn't use much oil in it's 60,000 miles or so. Seven to eight mpg depending on speed and tow car. All the Series 50 and 60 I have heard are very noisy if you are standing outside the engine compartment, unlike the 92 series. Did you have a blown muffler with the old engine too?
Your story does not match my experiences, but I'm glad you are happy-- thats what counts.
--Geoff
'92 RTS AZ
yea bet it doesn't idle as smooth as the old 6v92 two stroke the ones I have been around are shakers on idle 50 or 60 series
That is the sad nature of a 4 cylinder engine. No matter how much power they can put out, they are still not going to be as smooth as a 6 or V8 and especially an old 71 or 92 series. I do hope you like your new engine and you ought to be proud of what you did.
The 6V92 had about 80,000 miles on it. 320 hp recently tuned. Ya the series 50 rattles a bit at idle but how often are we doing that. I can tell you that when traveling it is a way quieter in the bedroom than the 92 was. coupled with the B400 with fifth gear it cruises at 1400rpm at 60 mph compared to the 92 /740 at 1850 rpm. that's probably the nicest part. If I tried to run the 92 at that speed it would overheat.They don't like lugging. Don't get me wrong , 71's and 92's were my life, 40 yrs of building and repairing them. I was hesitant in doing the swap, but it was to good of a deal to pass up. Cheers Gerry
The price you told me Gerry I would have bought 1 also lol and have no use for 1
good luck
the pics are up
I had a series 60 in the hockey team's bus. Yes it kind of vibrates at idle but I wouldn't call it a rattle. And for sure it sounds awful at any rpm compared to a 2 stroke. But the power! The flat torque curve from 1200 to 1800rpm is awsome. Go up any mountain pass with the cars.
JC
Looks like a S60 from the back. You could tell people it is, most wouldn't know the difference, LOL.
How was fabbing the intake and exhaust plumbing?
JC
Exhaust was easy intake took a bit of work. I used the charge air cooler that came with the donor bus.
Once you learn how to drive the engine/transmission you should see 9+MPG. Charge air cooler on the drivers side? If you have a clean radiator you won't overheat. Highest I saw was about 192F climbing Monarch pass in Colorado in 75-80F outside temp at 22MPH.
Enjoy,
Bill
If you want smooth shifting with the HT740, mine has the RV shifting sequence. Goes 1st converter, 2nd converter, 2nd lockup, then when shifting to third goes back to converter during the shift and then back to lockup-it eliminates the hard shift feel. It is only in converter for about 3 seconds. Does this for 4th gear. On down shift goes into converter then into lockup. Good Luck, TomC
Looks like a great install.
I have done 3 of the series 50 conversions and it isn't a easy job, but well worth the effort.
In my Eagle it started it's life with a 8v71, then to a 8v92 set at 475 hp. When I sold the Eagle it had a series 50 with the 740 transmission and a 3.36 rear. That was the best set up for power and good fuel economy I had with the coach. The world transmission would have been lots better. I put a 4060 in my son's coach with a 410 rear. My series 50 was turned up to 375 hp my son's is set at 350hp. There are lots of people here on the net that talk bad about the series 50 and 60 but I sure wish my MCI had one and not the 8v92. After driving the Eagle about 22,000 miles with the series 50 my MCI with the 8v92 is a dog. If the 8v92 has any problems it will be replaced with a 50 or 60.
I was wondering what hp you had your series 50 was set at.
Jack
Yep and some have removed the 50 series from Eagles because they thought the 50 series was a dog Jack lol I had one setting in my shop for 6 months till sold it was replaced by a C-13 Cat he loves
My actual ECM set up is for 320 hp. But I advanced the timing 1 degree on the cam gear and had Detroit Diesel BC rework the injectors and they are caliberated to cal code 10.
We experimented with a few engines on the dyno and found that injector cal code 10 gave us another 30 hp. the torque was marginally better at 1200lb.ft. Cal code 50 works almost the same.
Cheers, Gerry
I ran for a while at 320 until I could find someone to turn it up to the 375. Man did it make a lot of difference. I haven't heard about changing the timing, didn't think you could on the series 50.
Jack
I am not a big fan of the 6V92 or the S50 but if you would have done that to the 92 you would be seeing the same results. The only difference is the heat out put of the two-stroke from the four-stroke. With those mods in the 6V92 including the air to air and the new trans you would see around 9.2-9.5 mpg with 1100 to 1200 ftlbs tq.
Having said this I am Glad you are happy with what you have done.
Don
People just don't know what air to air will do for a 2 stroke do they Don lol the first engine that ever had air to air and the water cooling at the top of the piston something the new DD brag about fwiw
The price Gerry paid for the donor bus was hard to beat if it wasn't so far I would have bought one just for the transmission
Pardon my ignorance but what is air to air?
Quote from: wal1809 on July 05, 2012, 09:54:15 PM
Pardon my ignorance but what is air to air?
intercooler for the turbo. Basically a big radiator plumbed in to the air intake system between the turbo and the engine. The compressed air from the turbo runs through the big "radiator" to cool it before entering the engine. Serves 2 purposes...not only cooler air into the engine resulting in cooler running, but also cooler air is more dense than hot air so you essentially get more volume into the engine. You need 2 things to produce more power in a diesel...more air and more fuel.
I am totally happy with the technology of my '82 6V92TA; and air to air, or anything else someone comes up with to gain one mpg at thousands of dollars cost is B.S.
Sorry folks, I speak my mind and I am not interested in supporting anyone.
--Geoff
If we all thought a like Geoff DD would not have offered 4 different ways to cool the air
I like the the air to air myself I have always thought the after cooler setup was not that great in any engine DD,Cat or Cummins JMO it beats nothing
Of course aftercoolers work, maybe not as good as refrigerated air, BWTF, aftercoolers are fine with me. Im not paying big bucks for little gain with the new technology.
--Geoff