what makes HO an HO

[Task125]

getting ready to order,what makes the ho an ho. could I just ad an EZ and get same result?

want to get ho but want auto. don't feel like waiting anymore.

one more ? do you think it is eaiser to sell our trucks with or without the mods on them.

 

[David Muench]

There's no solid consensus on that. . Some have been told that there are no physical differences and it's just programming, some have been told there are physical differences (extra oiling in particular). I am betting on the former - I am trading from a 2nd gen HO 6 speed to a standard output auto.

 

[WadePatton]

Go ahead get the auto. Then add a fueling box--or whatever will be the equivilent to an EZ on an ETC.



In the old days (pre common rail) ETH- (HO) ran smaller injectors at higher pressures with different programming and some changes in the VP44. That's why BOMBERs got more enhanced performance out of ETC set-ups. The ETH trucks really needed injector upgrades to move up the performance ladder.



3G? Dunno, but DD will be able to help you out real soon!Oo.



I have the best all around deal. 6-speed with ETC and fueling box being delivered today---and one Gorgeous 2nd gen truck.

 

[MDKram]

I saw a presentation at Cummins Alberta last Thursday night on the new engine. The following is from memory and the room was loud so forgive me if I am wrong.



From recollection, the HO version has different pistons. These pistons have a circumferential, internal oil gallery located above (or adjacent to) the top ring land. This is to facilitate addition piston cooling for the higher output engines.



Regards, Marc

 

[MDKram]

Here is a rendered drawing of the HO piston x-section. This gallery cooled piston is only on the HO engines.



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[kmiller]

Nice picture of piston and J-jet!

 

[Whitmore]

here ya go

this is a page off of Fritz Ram page that gives all the diffs... ... ..... Kevin



http://dodgeram.org/tech/dsl/Facts/01ISBspecs.html

 

[Casey Balvert]

I don't think that link addresses the physical difference in the two versions of the 2003 engine. Or am I missing something?



Casey

 

[Whitmore]

I dont think that the link is for the 03, just the original HO, I aint seen 03 lititure yet... ... . sorry