Power ratings 1999 24V vs 2001 24V

[FAllen]

Hello everyone !



I've been browsing the DC literature on the power ratings of the 1999 engine (215bhp) and the 2001 engine (235hp) and I'm wondering why the ratings differ ??

 

[Uncle Joe]

I have the feeling those are paper horses(get it? like in paper tigers). i like to see indepandant dyno resoults proving the xtra hp

 

[Mundgyver]

I do not know about 99 to 2001 but I do know that 2001 Automatic 235 hp has a different turbo, fuel injector pump and pistons than my 2001 HO 245 hp. The shop manual is very specific about not mixing them between the two.

 

[MidwestMotorman]

ratings...

FAllen,



The 99s (manual ones for sure) were rated at 235hp, the same as the 00 and 01 automatics. The manuals have the higher ratings in the newer years.

 

[TowPro]

In 1998 and 99 they did not think the auto trans could hold the 235 HP, so they turned down the engine with different program and engine parts.



Then they relized they were right, and the trans could not hold the power, so they turned it up anyway!

Originally posted by FAllen

Hello everyone !



I've been browsing the DC literature on the power ratings of the 1999 engine (215bhp) and the 2001 engine (235hp) and I'm wondering why the ratings differ ??

 

[Archive]

TowPro...

 

[Shooter]

What he said ^^^^^^^

 

[Fred Swanson]

The 2000 auto's are rated the same as the 99's 215HP. Says it right on the motor. My understanding is the pistons, compression ratio were also different between the 99,2K 215HP and 2001 235HP motors.

It still seems very unlikely the auto and 5 speed are the same for 2001, as the turbo is different, just to name one thing.

Almost need to see it on a dyno, to prove the difference.

 

[Mr. Brewski]

Mundgyver,



Really? It has a different pump? It doesnt have a VP-44? I knew about the turbo change, 235Hp engine (ETH??) in 2001 has a different turbo - looks smaller to me than my '99. Different pistons? How are they different?

 

[JSchooley]

Just a stab in the dark, but could it be a different torque curve? I know my 99 A/T would take more torque at higher RPM which relates to higher HP.



If someone has the time to call Cummins (1-800-diesels) and get the torque/HP curves for both engines it might tell the story.

 

[Shooter]

Originally posted by Mr. Brewski

Mundgyver,



Really? It has a different pump? It doesnt have a VP-44? I knew about the turbo change, 235Hp engine (ETH??) in 2001 has a different turbo - looks smaller to me than my '99. Different pistons? How are they different?

2k1 ETC vs ETH

higher compression pistons for the ETH

different vp44 internals for the ETH

Depending on application of ETC different turbos

ETH has different ECM than 5sp ETC

ETH has different injectors than ETC

ETH has higher boost than ETC

460 or 480 lbft for ETC - 505 for ETH

235hp for ETC - 245 for ETH

yada... yada... .....

 

[Mundgyver]

Which my scanner was working to save me all this typing. In my 2001 Service Manual Supplement for 2001 Ram Truck model 1500-3500 section 9, page 9-4, 9-5, and 9-6 have a Service Procedure for Pistion Grading.



Quote: When rebuilding an engine with the original cylinder block, crankshaft and pistions, make sure the pistions are installed in their original cylinder.



If replacing the pistion(s), make sure the replacement pistion(s) are the same grade as the one being replaced.



If a new cylinder block and/or crankshaft is used, the pistion grading procedure MUST be performed to determine the proper pistion grade for each cylinder.



Next page Fig 8 Piston Grading Mumber Location



NOTE: NEVER INTERMIX PISTIONS FROM ONE ENGINE APPLICATION TO ANOTHER ENGINE APPLICATION. SEVER DRIVEABILITY CONCERNS MAY RESULT.



NOTE: Use the table below when pistion grading numbers are missing or not legible.



PISTION PROTRUSION CHART



IF MEASURING PISTION

IS AND USE

GRADING #: / PROTRUSION /GRADE

IS

245 HP / 215/235 HP

6050 / 6153 / 0. 609-0. 711 / A

/ mm

/ (0. 024-0. 028

IN. )





There is a page and a half of this with diagrams of how to measure. The one thing, that they are absolutly presistent about, is that you do not use the wrong type pistion. There are three grades of pistion. A, B and C. Within that there are nine different PROTRUSION HEIGHTS. And if that isn't enough there is an ALTERNATIVE GRADE IDENTIFICATION METHOD, with grade A, B or C and 3 different heights there. All of these are broken down into 2 columns by horse power as shown in the above example.



On page 14-2 section 14 of the same manual it address the Fuel injection Pump-245 HP Engine.



Description - Although the fuel injection pump on the 245 horse-power engine appears similar to the other VP 44 injection pumps, there are internal differences that make it unique.





Lots of stuff in these factory manuals. Dont leave home without them. Also keeps the dealer honest when it comes to warranty work if necessary.

 

[Mundgyver]

Here is where I got the info from.