What's Next..

[dbldragon]

very true but look at a ford 300 6 inline and 302v8 which is smoother . Engines design come with inherent traits ,horsepower torque smoothness. Hard to get the best of all those in one design .Packaging  of said qualities is also a factor.

Chuck

[CrabbyMilton]

So true. Some transit agencys repowered their buses with CUMMINS ISL's that originally had the DETROIT SERIES 50 because of smoothness issues. I can personally testify how great the old FORD 300 6 was. My previous work van had one and it was great. It was great for around town and fairly smooth running too, But, if I would have bought that van as a personal vehicle, I would have chosen the 302 V8 just for the overall improved smoothness over the 6 and that nice V8 grumble. It'll be interesting how these new ECOBOOST engines hold up over time with FORD. You can only get one V8 on the new F150 now and the EXPEDITON doesn't even offer a V8 now just the 3.5L V6 ECOBOOST. Oh well.

[luvrbus]

It's the 2 stroke design the 6L71 DDEC is as smooth as any V6 or V8 the 903 Cummins V8 will shake the bed sheets off the bed in a bus so will the 3208 Cat.I never heard of Transits replacing the diesel 50 with Cuminns but they did replace the 50 CNG with the Cummins CNG model the 50 CNG was a dog

[CrabbyMilton]

That surprises me about the CAT 3208. Here in Milwaukee, our transit system had some small GILLIG buses back in the 1990's with the 3208 and those engines were as smooth as glass and as quiet as a V8 gasoline engine. I don't know what the problem was with the CUMMINS 903 in being so rough for a V8 but those were generally regarded as stinker engines in buses anyway with bigger problems.
Some Canadian transit agency repowered their buses that had the S50's with CUMMINS ISL's but I lost that link. I think we can all agree but DETROIT 2 cycles being the smoothest of all. I do love the description that someone applied "Swarm of bees in spam can."

[lvmci]

Hi All, I've  always had F250s with V8s, 460s, 390s, 352 and a 5.4 ltr, 1st year of the modular engine, Triton, it was a factory CNG dedicated, not dual fuel, powerful, smooth, decent fuel milage, liked it, except it spit out spark plugs! Ford wanted $2500 to fix it, how did ford get away with this, my mechanic repaired it for $250, with a modern version of a helicoil, next spit spark plug was $625, from a different shop, by the time the third ones simptons appeared I had enough, how could such a great truck have such a huge flaw, sold it and got an old 300 straight 6, great truck engine, a little thirsty, but no spitting spark plugs, lvmci...

[CrabbyMilton]

Yeah those early FORD V8 and V10 engines had that problem but that issue was long corrected. Sadly, such a thing can burn someone for a long time on a product. Makes you wonder how they could have missed that one back about nearly 20 years ago when they rolled out that engine line.

[muldoonman]

You wonder if they will still produce these engines as they did with the 8V92 2 strokes for the military. Still might make them (8V92's) for the fighting guys. Sounds like the Series 60 will be a pretty tough engine to replace.

[luvrbus]

They haven't cast any new blocks for the 8V92 series in 5 years they just make parts and sell the re con engines plus sell the few new ones left, try buying a new head for a 8V92 none to be had according to WW William only a re con same with  DD crank only aftermarkets are available.
Interstate/ McBee has taken over the Relaiblit line they run the plant in Utah now DD has nothing to do with anylonger 

[muldoonman]

Yeah, That's what scares me on my 8V92 that is it's going to crash long before the coach does. Only have 76,000 miles on it now but still worried.