egt max
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Joined: Aug 2004
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From: SLC, UT
I'm the same as Kwik with coming in under the 1250 most have agreed on. Although I wouldn't be afraid to run 1200-1250 for several minutes. BTW, just got back from the last camping trip of the season and the truck pulled great as usual. Pulled a mountain pass 8% grade for 6 miles with switchbacks every 100 yards and didn't go over 1150 with my 60 hp tow performance tune. Gotta luv the 7.3!!!
Last edited by dpwilson; Sep 18, 2007 at 07:37 PM.
Posting Guru
Joined: Jun 2007
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From: OAHU,KANEOHE HAWAII
Originally Posted by dpwilson
I'm the same as Kwik with coming in under the 1250 most have agreed on. Although I wouldn't be afraid to run 1200-1250 for several minutes. BTW, just got back from the last camping trip of the season and the truck pulled great as usual. Pulled a mountain pass 8% grade for 6 miles with switchbacks every 100 yards and didn't go over 1150 with my 60 hp tow performance tune. Gotta luv the 7.3!!!
Postmaster
Joined: Jul 2006
Posts: 4,993
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From: Bend, OR
I have towed for 30miles or more at 1200-1250... 140k on the motor... Your fine all day at 1250... the pistons never see that temp with the oil jets and fresh air coming in all the time...
Ever jump in a cummins and try to keep it under 1250... there pistons dont melt do they...
Ever jump in a cummins and try to keep it under 1250... there pistons dont melt do they...
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Elder User
Joined: Aug 2004
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From: SLC, UT
Originally Posted by kupaa
how heavy is your trailer?
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Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by dpwilson
I'm the same as Kwik with coming in under the 1250 most have agreed on. Although I wouldn't be afraid to run 1200-1250 for several minutes. BTW, just got back from the last camping trip of the season and the truck pulled great as usual. Pulled a mountain pass 8% grade for 6 miles with switchbacks every 100 yards and didn't go over 1150 with my 60 hp tow performance tune. Gotta luv the 7.3!!!
Last time I was out I pulled over Cedar Breaks pass, it crested at 9900 or so feet and I was down into third gear and 35 mph on that one. Too steep for fourth, even. The EGT's were way down on that pull because I didn't have to WOT the engine going that slow. I don't remember what they were, but it was well below the red zone, I remember that.
Had a long line of cars behind me at the top too.
Butt-Head
Joined: Apr 2004
Posts: 9,437
Likes: 2,925
From: Reed Point, MT
Originally Posted by CSIPSD
Ever jump in a cummins and try to keep it under 1250... there pistons dont melt do they...
Those Cummins do like to make some heat. However, they also like to make lots of boost and that comes from having a severely undersized turbine housing.
Hotshot
Joined: Feb 2007
Posts: 10,499
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From: Sterling Heights,Mi
Originally Posted by dpwilson
about 6500 for trailer. Fully loaded I'm around 8k. Hoping for a new 5th wheel in the near future. Either that or a new rugrat, should be fun either way.
Last edited by just another truck; Sep 19, 2007 at 09:16 AM.
Lead Driver
Joined: Oct 2004
Posts: 7,413
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From: Columbia, MO
Originally Posted by cleatus12r
Those Cummins do like to make some heat. However, they also like to make lots of boost
Back on topic, if I were towing up a long grade for several minutes, I'd keep it around 1200. If you're running a 1/4 mile drag race, or doing a sled pull, I wouldn't even worry about looking at the gauge. There are a good number of Powerstrokes with stock pistons who are drag racing and pulling that have no problems, and they are well exceeding the suggested 1250 redline. I think mech has said his pyro is pegged past 1600 at the end of a pull. I don't think the 10-15 seconds of high heat during a race or pull is enough time to even come close to heat soaking the pistons and causing damage.