Why no Ecoboost in the F250?

[sd455dan]

What was/went wrong with the Cummins 5.0 V8 ? And is the 12k tow rating due to the Cummins engine, or due to the Nissan truck ?

Remember that the 5.0 was developed as a more domesticized, less commercial grade addition next to the 6.7 but Ram didnt take it, so Cummins offered it to anyone else who bought it, which happened to be Nissan, and Cummins was glad someone took it.

It was never intended by Cummins to compete in the horsepower war between the B6.7, the Duramax or the Powerstroke, but to be a sort of Ecodiesel for the 3/4 ton mixed use customers. Perhaps Nissan placed it wrong in the market ?

Wasn't the MPG less than what many 1 ton 4x4 5.9's were getting? The 3.0 VM diesel mpg has been really good in My BIL's Ram 1500 truck

 

[Renze]

Wasn't the MPG less than what many 1 ton 4x4 5.9's were getting? The 3.0 VM diesel mpg has been really good in My BIL's Ram 1500 truck

Nissan Titan Diesel Gets Ram 1500 EcoDiesel’s Sloppy Seconds

2014 Ram 1500 EcoDiesel vs 2015 Nissan Titan Diesel 2014 is expected to be a big year for diesel-equipped pickups, and two of the most talked-about vehicles right now are the 2014 Ram 1500 EcoDiesel and the 2015 Nissan Titan Diesel, both of which are set to be released within the next couple of...

www.cardebater.com

The Ecodiesel is a winner on fuel economy, the 6.7 is a winner on torque. The ISV 5.0 doesnt impress on either... With its higher engine rpm, it produces its power at roughly 15% lower boost levels. If Cummins ran the same specific power per liter per rpm, the engine would sit around 360hp which would mean it nullifies the 6.7 standard output variant with the 68RFE transmission.

If they used six of these cylinders at the same specific output as the 6.7 at the ISVs 4200rpm redline, it would have 3.7 liter and 270hp. Now tune it some more and you will get to the same hp numbers as the current ISV 5.0 but at a better fuel economy, and you would have a serious contender in the half ton and 3/4 ton market.

I think the Cummins product planners listened too much to the folks complaining that the 420hp 6.7 was too much and they were happy with the 320hp and 550-600ft-lbs 5.9, not realising that people who are happy with yesteryears specs dont buy new stuff so they developed a not competitive engine... At least not in pickup trucks.

How well does it sell in school buses and RVs ?

 

[hiddentacocatneddih]

The v8 cummins was a mis step. Worse platform for no improvement in anyway.

The Nissan was 1 ton price with 1.75 ton performance.

 

[Hay Dude]

Clessie Cummins is rolling in his grave on that one.

 

[deezler]

I do give Cummins credit for properly finishing their development on the 5.0L V8, seeing it through and getting it reasonably reliable (at least on dyno testing). In the early stages it was abysmal and I suppose that really colored my impressions of the motor. It was a lot of firsts for Cummins - Small V8 with turbo in the valley, etc etc. But they didn't flip the cylinder head flow. At first the exhaust manifolds connected to the up-pipes with flimsy 2-bolt flanges that quickly leaked and blew shrieking whistles. It was kind of hilarious, to be honest. The front accessory drive setup was a convoluted mess. Anyway like I said they got it mostly all fixed and proven durable before releasing for production, but it was a delayed process. The recipe was kind of a poor compromise for both efficiency AND power capability, from the start. Though I would probably blame the Nissan guys for the anemic tow rating.

Cummins didn't tell us who the OEM buyer was for their 5.0L V8 during the design phase; all we know is they started by expecting huge sales volumes and then they totally cratered. Perhaps when Ram passed on it, and Nissan stepped in.

 

[blee03]

Silly Cummins, V8's are for sports cars!

 

[Renze]

Clessie Cummins is rolling in his grave on that one.

Wasnt he still alive when the VIM/VINE/VAL family of high rpm, short stroke V6 and V8 engines were introduced in 1960. When they started producing these engines in the UK Darlington plant in 1965, they were relying on Dodge and Ford trucks predominantly for the British home market, untill these manufacturers perished and Cummins Darlington switched over to the B and C series production in 1985 which allowed them to penetrate the mainland European OEM market...

The ISV5.0 is quite similar: An oversquare V motor that didnt convince.

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[oliver1555]

Clessie was still alive and kicking then, but no longer affiliated with Cummins Engine Company.

 

[Renze]

Silly Cummins, V8's are for sports cars!

Cummins was known for its market entrance in 1989 with a fantastic inline 6 among two mediocre V8s.
So even in that aspect, using the cylinder design in a 3.7 liter inline 6 configuration would cash out their reputation.

I would put these cylinders in a row of six, drop the redline to around 3500rpm and up the power to 270hp, and it becomes the standard diesel for 2500 pickups, where EV and Ecoboost have no place.

 

[hiddentacocatneddih]

Why not just go to a 5.9 6bt. Already developed and in production