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Diesel P/U engine ??
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FREEDGUY View Drop Down
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Joined: 15 Apr 2017
Location: South West Mich
Points: 5396 		Post Options Post Options   Thanks (0) Thanks(0)   Quote FREEDGUY Quote  Post ReplyReply Direct Link To This Post Topic: Diesel P/U engine ??
    Posted: 02 Aug 2020 at 5:49pm
What is the "max" rpm's that a diesel engine in a p/u with an auto tranny will get to ? I had a guy pull out in front of me this afternoon and he really stomped on it to get ahead of me but it sure sounded like it was hitting 4 grand (my windows were down) ?? Maybe that's not out of the "norm", I've never been in or driven one. Thanks
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TramwayGuy View Drop Down
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Joined: 19 Jan 2010
Location: Northern NY
Points: 11753 		Post Options Post Options   Thanks (0) Thanks(0)   Quote TramwayGuy Quote  Post ReplyReply Direct Link To This Post Posted: 02 Aug 2020 at 6:22pm
At least 3000 for a 24valve Cummins.
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Joined: 12 Sep 2009
Location: Greensville,Ont
Points: 24693 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jaybmiller Quote  Post ReplyReply Direct Link To This Post Posted: 02 Aug 2020 at 7:39pm
depends on who 'tunered' it....and of course overall design and parts...
but a run-of-the-mill ... maybe tops out at 5000 RPM
diesel burns slower than gas which is one limiting factor....
3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)

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DMiller View Drop Down
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Joined: 14 Sep 2009
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Points: 33980 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 02 Aug 2020 at 7:41pm
7.3l Fords will hit 3800 easily.  6.0 and 6.4 are shorter stroke engines can turn faster.  These are not HD Diesels.
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PaulB View Drop Down
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Joined: 12 Sep 2009
Location: Rocky Ridge Md
Points: 5105 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 02 Aug 2020 at 7:50pm
Musta been one of those power JOKES. They sound like a constipated Sumo wrestler after eating cheese sandwiches for the last month. Then have some kid remove  the muffler and add a tuner chip and it will look like the orange-blossom special rounding the mountain and still they won't  get out of a VW bug's way LOL
If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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Dakota Dave View Drop Down
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Joined: 12 Sep 2009
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Points: 3971 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dakota Dave Quote  Post ReplyReply Direct Link To This Post Posted: 02 Aug 2020 at 7:51pm
Duramax l5p redlines at 3450 rpm. I've seen guys at the track claim 4000 but they don't seem to last long usually break other drive line parts before anything happens to the engine

Edited by Dakota Dave - 02 Aug 2020 at 7:54pm
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ac fleet View Drop Down
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Joined: 12 Jan 2014
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Points: 2335 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ac fleet Quote  Post ReplyReply Direct Link To This Post Posted: 02 Aug 2020 at 8:15pm
7.3 bout 3500 or so but wouldnt stay together for many yards IF you had it open!
mine runs 60 at 2100 --- I usually never run it much past 1500 to 1750. ---runs better in that range and gets around 16 mpg,--so why hammer it?


Edited by ac fleet - 02 Aug 2020 at 8:18pm
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shameless dude View Drop Down
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Joined: 10 Apr 2017
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Points: 13607 		Post Options Post Options   Thanks (0) Thanks(0)   Quote shameless dude Quote  Post ReplyReply Direct Link To This Post Posted: 03 Aug 2020 at 4:48am
he just wanted to show off to you that he had a diesel! he'll ram rod it enough and soon he'll be walking! bet it smoked sum too?
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FREEDGUY View Drop Down
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Joined: 15 Apr 2017
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Points: 5396 		Post Options Post Options   Thanks (0) Thanks(0)   Quote FREEDGUY Quote  Post ReplyReply Direct Link To This Post Posted: 03 Aug 2020 at 4:35pm
Originally posted by shameless dude shameless dude wrote:

he just wanted to show off to you that he had a diesel! he'll ram rod it enough and soon he'll be walking! bet it smoked sum too?
 
Sadly Shameless, it was pretty clean exhaust Confused ,I could definitely smell it though WinkWink. This was a pretty new GM product BTW. I am recalling me as a passenger in a vehicle when the driver "kicked it down" into passing mode on an automatic with a gasser and hitting 5500 rpm's. I didn't know if a modern diesel could hit those rpm's in "passing gear" Shocked
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Joined: 14 Sep 2009
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Points: 33980 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 03 Aug 2020 at 6:20pm
RPM Limits on a Duramax is roughly 3200.  Can sound quite high and not be.  Tuners can over ride the limiter, to the owner be cautious as to how long, how many times and how much load when pull that stunt.
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Eldon (WA) View Drop Down
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Joined: 11 Sep 2009
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Points: 7765 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Eldon (WA) Quote  Post ReplyReply Direct Link To This Post Posted: 03 Aug 2020 at 10:28pm
Originally posted by DMiller DMiller wrote:

RPM Limits on a Duramax is roughly 3200.  Can sound quite high and not be.  Tuners can over ride the limiter, to the owner be cautious as to how long, how many times and how much load when pull that stunt.
My 2016 Duramax has downshifted to 4500 with the exhaust brake on, had me worried....only had 1000 miles on it at the time. Didn't seem to hurt it.
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