thoghts o red line

[CDyksman]

I have an 04 2500 6 spd and have run 100-300 rpm's into the red line several times on the shifts from 2nd to 3rd and 3rd to 4th. I should metion that the truck only has 2100 miles on it . What are some thoughts o0n the effects of doing this. I try not to make it a regular thing, but sometimes those gears are so short. Thanks

Colby

 

[sag2]

I ran my 03 (40,000+ miles) and now my 04 up to the red line many times. I figure I paid for the governor, so I might as well use it. The engine should last many thousands of miles running at governed speed. I assume that is why they put it there, to keep it at a safe speed.

 

[curatchko]

I've heard a Cummins tech once answer a question as to how long these engines can run at peak rpm, and he said ALL DAY AND ALL NIGHT!!!!!!!!!!!!!!!

 

[XcumminsX]

these engines are tested at redline for a certain amout of time they can handle it. With mine in o/d off ive ran it to 3400 rpm for about 1 minute straight. I ran it to operating temp and about 20 miles and then to 3400 rpm for 1 minute to burn off all the bad stuff in the engine. I drive it alot in the city thats why i do this once a week.



Nick

 

[CATCRACKER]

at least 5,000 hours

 

[jakprince]

Try backing off the throttle a little before you shift. these new trucks are a little touchy,especially if you really have your foot in it.

 

[Wiredawg]

Never red-lined

All:

I never red-line either of mine. With the power enhancments, my 3500 hits max torque/HP at 2100 rpm. I rev her out to 2800, but no benefit for me any higher. I let the old slush box control shifts on my wife's truck. Red-line is way out of powerband for my trucks.



What ever works and make ya happy.



Wiredawg

 

[Rosco]

Unlike gas engines diesels can be run right up to the redline without worry. At work the fire engines I drive are designed to shift at the redline when run hard (which is often). Also if you get a few hundred rpm "flare" over the redline during shifts I would not lose too much sleep over it.



Finally, diesels used in boats are run up to the redline for hours on end especially in Coast Guard and small Navy vessels.

 

[Wiredawg]

They can, but are they efficient?

For the sake of conversation:



We all agree they can run at or above red-line, but are they efficient in terms of power or economy?



I beat a BOMBed 03 6spd a while back and I believe I beat him on the shifts: I believe he was revving higher than me before shifting. I was hitting around 2800 and I believe he was redlining.



Thoughts?



Wiredawg

 

[Bickford]

Hello all,



I have also seen the engine numbers flash into the red zone on my 2003 HO CTD six speed Dodge.



I can speak from experience about the Cummings engines used in the US Coast Guard small boats. You see the people who drive the small boats, the Coxswain's are called BM's short for Bosons Mates. The poor guys that replace and repair the engine's are the MK's. Or nick named the machinery kickers.



Most times the Bosons Mate jumped in the boat and when ever possible they held the throttles wide open (to the stops). If you think about the hundreds / thousands of hours spent at red line.

Or who knows how many RPM above the factory red line?

Looking to rescue people, training boat crews.



All of the Cummings engines had a little factory installed RPM limit. It was a very thin wire with lead seals on the fuel racks, just like on your house electric hour meter. It seems that some how these wires or lead seals would fall off... or were opened then the fuel stops would be adjusted for a few hundred??? more RPM and then resealed.



It was an ongoing battle between the Coxswain's wanting to go faster and the machinery kickers. Trying to save a very $$$ well made pair of Cummings engines.



Oh well sorry to ramble on, this being my second Dodge CTD truck my engine it will remain unaltered.



US Coast Guard retired.

God Bless,



Earl Bickford