What makes a high output and a standard out put different

[Turbo Terry]

2022. Much has been written but nothing is very clear.

 

[BigPapa]

Looks like about 50HP and 225 ft/lb.

 

[Timd32]

Compression Ratio:
Standard 18.8:1
High Output (HO) 16.5:1

 

[bcbender]

$$$$$$

 

[AH64ID]

Pistons and programming are the main two differences.

HO high more boost, lower compression, and more fuel.

 

[Timd32]

Upper and Lower Radiator hoses are listed different part numbers.

Same with radiator and the actual shroud.

Figure the Radiator would be as it's a different transmission, was kinda surprised it lists different hoses and shroud.

 

[promisedland]

What are the power ratings?

 

[AH64ID]

What are the power ratings?

Depends on the year but currently it’s

SO: 370/850
HO: 420/1075
C&C: 360/800

Upper and Lower Radiator hoses are listed different part numbers.

Same with radiator and the actual shroud.

Figure the Radiator would be as it's a different transmission, was kinda surprised it lists different hoses and shroud.

Interesting. Even the radiator surprises me as I didn’t think the radiator had any transmission cooling built in.

I don’t see a capacity difference for coolant either.

Any difference in intercooler or trans cooler?

 

[Timd32]

Not first time system is not 100% but it's not always listed more $ for the HO either. These are probably some sort of stock list. Did not cross check any of these.

Lower Hose
SO
68359638AC $42.65

HO
68359639AC $40.85

Upper Hose
SO
68359598AF $57.25

HO
68359600AF $53.30

Radiator
SO
68322491AA $513

HO
68322492AA $593

 

[bcbender]

I wonder if when they are installing the 21'+ truck injection system and re-programming on the 19'-20's during the recall if the HO's will be bumped from the 400/1000 to the 420/1075 since I assume the other hard parts are probably the same.

 

[GirchyGirchy]

I wonder if when they are installing the 21'+ truck injection system and re-programming on the 19'-20's during the recall if the HO's will be bumped from the 400/1000 to the 420/1075 since I assume the other hard parts are probably the same.

Highly doubtful. I believe the injectors are different between '19/'20 and '21...I know they are between '21 and '22, along with the feed tubes. But I'd imagine any rating increases would have required significant testing above and beyond the normal CP4-to-CP3 conversions, plus perhaps a re-certification for EPA.

Within a given MY, the main differences between SO and HO are pistons, injectors, flexplate, and calibration.

 

[bcbender]

well I guess I'll have to muddle through with a measly 400/1000.

 

[bcbender]

Looked today.. upper radiator hose says D2 HO and DP 5500.... interesting

 

[gsbrockman]

Looked today.. upper radiator hose says D2 HO and DP 5500.... interesting

View attachment 132610

......but the DP 5500 is LO (Low Output)

Maybe @AH64ID can chime in.....

 

[GirchyGirchy]

......but the DP 5500 is LO (Low Output)

...no it's not, it's a CC. There's no SO/HO version of the CC engines. They do share the Aisin transmission (and flexplate), and maybe they share some heavy-duty cooling hardware, too.

I am surprised it specifies 5500...is the DP 4500 hose/radiator different, maybe shared with the DD 3500?

 

[AH64ID]

It surprises me that there is any difference in the cooling system 2500-5500. I would think that it would be cheaper to have 1 system that works on all models. The thermostat would negate the effect of “too-much” cooling, if it even was that much of a difference.

What would surprise me more would be that the HO 3500 and 5500 have more in common than the 4500 and 5500, but then again the HO 3500 and 5500 have the highest GCWR’s.

 

[bcbender]

In 30y of working with / on Dodge vehicles.. (well any OEM really) is that not much surprises me when it comes to parts usage and commonality. Seem like the logical stuff is overlooked sometimes. I wonder if its a material difference like ply rating (hoses) or coatings? Like you said John, they have a higher rating when configured so perhaps duty cycle comes into play. I too doubt to many hard parts are really all that different