Cummins new gas engine

[Welder Dave]

There are a lot of people really happy with their Ecoboost engines and have got a lot of miles out of them. Proper maintenance and driving them reasonably helps. If the comparison is to diesels, after a long drive or working them hard any engine with a turbo should be idled for a couple minutes before you shut it off. Should be warmed up for a few minutes as well. Any engine should be idled after working hard. You don't just shut of your equipment so why would you just shut off your vehicle. The technology is there. With a little refinement there could be gas engines just as reliable as diesel engines. There have also been some less than stellar diesel engines. You have to do an apples to apples comparison. You can't compare the best diesel to a marginal gas engine. Update a 300-6 with Ecoboost technology and it would be hard to beat.

 

[Truck Shop]

Here's a fine example of gas guzzling power-400 Hall Scott and it's even a over head cam engine.
*

 

[terex herder]

With a little refinement there could be DIESEL engines just as reliable as GAS engines.

There, fixed it for you.

 

[Shimmy1]

Update a 300-6 with Ecoboost technology and it would be hard to beat.

Good grief, you old farts that continue to sing a 300-6 praises. I've been around a few, and not one could hardly get out of it's own way.

 

[Welder Dave]

Pre emissions diesels, there are lots of fine examples. Some with emissions are OK but they are so complicated and expensive to fix when they break down they defeat the purpose of a reliable diesel.

 

[Welder Dave]

300-6's were well known to go over 500K miles and had good torque for pulling even in a 1 ton. Not the fastest but about as bulletproof as you could get. Not many gas engines had that kind of reputation. The problem now is everyday is in too much of hurry. See people weaving in and out of traffic just to get ahead of you and you get to the next stop light and they're one car ahead of you.

 

[Acoals]

good torque for pulling even in a 1 ton.

No, not at all. Listen, I drove an F150 with a 300/6 for 13 years. It was a great truck, probably the best engine I will ever have, but it was not a towing engine. With 4000lb behind it had all it could do to *try* to keep 60 on the highway. Nobody has ever sung the 300/6's praises louder than me, but if there was any significant amount of weight to be moved you needed something else.

 

[cfherrman]

Looks like the gas Cummins will be 200/300 HP and 600/660 tq under 2000 rpm.

Will be a great engine imo, better than the gas v8s

 

[Truck Shop]

First off----don't get too excited about a Cummins gas--The amount of gutless worthless turds
Cummins has built is just about equal to anything good Cummins built. All people can relate to
when it comes to Cummins is the 5.9-8.3's and a T-shirt.
Cummins road of garbage is just as impressive as it's road to triumph. Lets see there were these
all wonderful and great---triple nickel 555's, and 903's, then that wonderful series of big cam's
which only two the BCII & III had a good reputation, anything with low flow or STC really was is
a loser. The old taper nose cranks were notorious for breaking even at stock settings. Cummins
was a pushrod engine company, Cat & Detroit both had OHC long before Cummins, and when
Cummins built the twin cam ISX--too many issues went back to R&D. You can always tell where
a M11 parked, there is a outline on the ground. Glory over the twin turbo 475 BCII with MVT
timing, or for that fact anything with MVT was a loser. The all great KTA series holy smokes
that thing had so many Cummins revisions. And the mighty 1710.
*The N14 was the best they built in large displacement.
*
I wouldn't get too excited about a gas engine. It will take about 6 years to work the bugs out.
Because if Cummins approaches building a gas engine like their diesels---there will be a list
of CPL's twenty miles long.

 

[Acoals]

The 5.9 was a noisy rattletrap anyway . . .

 

[cfherrman]

Yeah the 5.9 is not all that great.

If they base it off the 2025 6.7 it should be ok

 

[Truck Shop]

It still has hydraulic roller lifters---pew. How about OHC solid.

 

[Shimmy1]

Yeah the 5.9 is not all that great.

I can't say I share the same opinion. There are thousands of machines that were built with a 5.9 where the machine wore out and the engine was still fine.

 

[CM1995]

I can't say I share the same opinion. There are thousands of machines that were built with a 5.9 where the machine wore out and the engine was still fine.

Agreed. It's a variant but that little 3.9 in my 1995 Gradall will fire off every time you hit the switch and I don't remember when we changed or even charged a battery on it. In 30 years all we have done is service it and change a starter. No ****.

 

[Shimmy1]

Agreed. It's a variant but that little 3.9 in my 1995 Gradall will fire off every time you hit the switch and I don't remember when we changed or even charged a battery on it. In 30 years all we have done is service it and change a starter. No ****.

Twenty years ago, the shop guy at Krider Equipment (before it was Titan) told me they had a couple of wheel loaders with over 17k hours that were in a factory application. Well maintained, had pins and bushings replaced, very few operators. Management decided that instead of trading them in, they replaced the engines. They ran well, didn't use oil, they just were concerned because of the hours. They tore one of them down to inspect it, and said the bearings showed minimal wear, and the cylinders showed none, said you could still see the cross-hatch.

Now put that same engine in a pickup or farm tractor, they do not seem to last as long. Probably mostly due to abuse or neglect, but that's not the engine's fault.

 

[colson04]

I can't say I share the same opinion. There are thousands of machines that were built with a 5.9 where the machine wore out and the engine was still fine.

3.9's too. Can't seem to kill them little guys either.

 

[MG84]

I've had excellent luck with the 3.9/5.9 Cummins when run at reasonable power levels, especially in construction/industrial applications. The 5.9 in the pickups and MDT's, especially the later versions, were being pushed beyond what they were ever intended to be IMO.

 

[Steve Frazier]

What was difference on the 351M compared to the 351W?

The 351W was such a success the demand was higher than Ford could produce them. To meet the immediate demand they created the 351M for Modified using the 400 block with the 351W crank. The result was dismal. It was a very low compression engine to meet smog requirements and horsepower was just 160. It also was prone to cracking on the block deck. I had an F350 with one in it and it was a pig. I ended up swapping it out for the 351W that I built up a little and was much happier.

The 351C was designed for racing. The ports and valves were huge! It was popular back in my motorhead days and there were articles where they modified the heads to fit the small block. A lot of machining was required so it was a very expensive proposition. From what I read back in that time period it ceased production because they couldn't make it meet the emissions standards of the Clean Air Act of 1970. 1971 was the last year it was available in a factory vehicle.

It would be interesting to see what could be done with that engine today with fuel injection and fuel management system. I bet it would be a screamer!!

 

[Truck Shop]

The 351W was a mid cu.in low horse power engine. With terrible 302 heads, there was not
enough port size to accommodate the displacement. The W came out during the Cleveland
reign. The Cleveland came in two varieties 2V & 4V, the 2V head was also used on the 351M/
400. The Cleveland 4V heads were derived from the Boss 302, and the 2V head is quite similar
except smaller intakes & open chamber. Cleveland's had two basic heads {closed & open chamber}
with 2.19 intake valves, the intake ports/runners rivaled the 429's. Not many 351M's made they'er
way into cars but the 400 did. Low compression and poor oiling was the biggest issue with
modifieds. It wasn't until late 80's rolled around and major experimenting with the 351 Windsor
did anything in the way of aftermarket heads arrive. Once it had some heads it ran. But the 400
can be built to over 500 hp to because of aftermarket. And all have the same bore spacing.
*

351 Cleveland Cylinder Heads Guide: Factory Iron Heads

351 Cleveland Cylinder Heads Guide: Factory Iron Heads- Covers Engine Building and Performance Updgrades to the 351C, 351M, 400M Ford Cleveland Engine

www.diyford.com

These heads are the reason it was banned from NASCAR. The trouble is building a Cleveland
these days just about breaks the bank.

 

[Truck Shop]

The over built legend of the 5.9 doesn't mean a gas engine will be as good. The first buyers
will be guinea pigs.