h.o. comrail quiet/std output loud?

[cfrye]

In my digging around for info I came to the conclusion that the ho motor had the the pilot injection making the motor quiet but nobody talks about the std motor 250hp 460 lbs ft. ? They say that both engines have had engine noise levels reduced leaving the idea that the std motor would be louder.

 

[nickleinonen]

the standard hp motor should be just as loud [or just as quiet] as the high output motor. they both use the same fuel system and probably the same injectors. . all they have to do is modify the pulse to the injectors for more or less fuel. . standard output is just a computer programing probably.

 

[Casey Balvert]

Originally posted by nickleinonen

the standard hp motor should be just as loud [or just as quiet] as the high output motor. they both use the same fuel system and probably the same injectors. . all they have to do is modify the pulse to the injectors for more or less fuel. . standard output is just a computer programing probably.

If that is the case, you have to wonder why the $700 price difference.



Casey

 

[cfrye]

So maybe an aftermarket computer that would get rid of the initial injection of diesel fuel, louder and save gas milage?

 

[nickleinonen]

Originally posted by CBalvert





If that is the case, you have to wonder why the $700 price difference.



Casey

that could be just for the new 3rd gen body. if you price out a 02 on the canadian dodge website, the HO and the normal versions are the same price. . the normal version includes a 5 spd. the HO needs the 6spd extra. .

could also be to cover any potential warrenty claims. . if you look at a big truck say, with a 60 series in it. it can be had with many different HP ratings. higher you go, the more it costs, but the only difference is programing. same goes for the little 3126 cat that ford puts in their 650/750. it comes with a max rating of 210hp but you can upgrade it to the 330hp rating, but you need to pay the difference if it is under warrenty. if not under warrenty, there are dealers/shops that will uprate the programing for 1 hour labor charge

 

[Casey Balvert]

Originally posted by nickleinonen





that could be just for the new 3rd gen body. if you price out a 02 on the canadian dodge website, the HO and the normal versions are the same price. . the normal version includes a 5 spd. the HO needs the 6spd extra. .

could also be to cover .....

I stand corrected, Nick. The difference is $510 Canadian. The ETC is 6,275 and the ETH is 6,785 Canadian. The 5 speed manual is no charge with the ETC and the six speed runs an additional 1,315 when you buy the ETH even though it is the only transmission available. I really don't think the 3rd generation body is a factor in the engine pricing.



Casey

 

[David Muench]

They probably charge for the HO still for the same reason Jeep charged extra for the 19 gallon gas tank over the standard 15 gallon tank (though it was the same tank with a hose to prevent you from putting all 19 gallons in) - they can.



In the 2nd gen trucks the HO's have significant internal differences, but it's sounding like the 3rd gens are just programming. That's why I ordered a standard ETC and the 47RE instead of waiting for the HO and 48RE. . The ETC will be able to be bumped up and the 47RE has proven strength upgrades. Hopefully the 48RE will be the best thing since sliced bread, but for now it's a brand new unproven transmission.

 

[kmiller]

I saw the cut away HO at the Cummins CMEP during the TDR rally and there are some differences. The one the was visable was J-jets that spray oil up under the bottom of the pistons. Also there is a difference in the weight of the two although I don't know why.

 

[nickleinonen]

which one was heavier? was it the HO or the SO ??? i am assuming it was the HO topping the scale for weight, but you never know...

 

[kmiller]

Originally posted by nickleinonen

which one was heavier? was it the HO or the SO ??? i am assuming it was the HO topping the scale for weight, but you never know...

Sorry to say I was tired and excited and the numbers just went off in the air. Both over 1000# though.

 

[DEHurst]

h.o.comrail quiet, so is the std. output

Both the high output and the standard output may use of pilot injection to control combustion noise. Both will exhibit similar noise ("quietness").



Both have HPCR gear train, off-set piston pin, low cyclic torque fuel pump, bedplate, and low noise cylinder block to keep the "good diesel sound" and reduce the "bad diesel sound".



It's "neighbor friendly".

 

[Chace TX]

Both are quiet.

I have driven both and they both sound the same (very, very quiet). The HO would give an EZ equipped 24 valve a run for it's money. The standard output version with the 5 speed was as big a dog as my 2001 was when I got it.