Sweet spot
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Lead Driver
Joined: Sep 2005
Posts: 9,399
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From: Norco,CA
Sweet spot
I have a 2004 6.0L PSD. What is the sweet spot to run the engine to make the most tq and hp while towing. Its a 4x4 cc lb with
35 tires. I have a heavy trialer and want to make sure I keep it at most tq and hp on the highway. Thanks, Chet
35 tires. I have a heavy trialer and want to make sure I keep it at most tq and hp on the highway. Thanks, Chet
Logistics Pro
Joined: Mar 2007
Posts: 4,604
Likes: 4
From: Claremore, OK
I believe it's 2k rpm...right at the top of the torque power band. The max horsepower isn't until something like 3300 rpm. Also, at 2k rpm (actually slightly below that) you'll get rather reasonable fuel mileage as well.
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Lead Driver
Joined: Sep 2005
Posts: 9,399
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From: Norco,CA
Thanks guys. I know my 7.3 mpg is right at 2000rpm. I thought the 6.0L would be a little higher because of the higher RPM motor. We'll be towing 16K up 15 and 40 freeways and was wondering where to keep the RPM's without over working the motor. Just did a bunch of work ARP's, bulletproof oil cooler and EGR upgrade and don't want the over heating problem again. Has anybody towed that kind of weight? Just upgraded all the fuilds to. Wish me luck and I'll report back either way. Chet
Logistics Pro
Joined: Mar 2007
Posts: 4,604
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From: Claremore, OK
Might be different with a tuner...but here's the specs on a stock truck.
6.0L Power Stroke Specs
It builds power/torque lower because of the VGT.You might get ahold of UtahTom. I think he tows in that weight range regularly
6.0L Power Stroke Specs
Post Fiend
Joined: Oct 2005
Posts: 10,626
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From: Plano TX and Brentwood TN
It'll depend on your setup. 2k is the listed max TQ for these engines. Gearing will also affect where you "feel" the TQ. Just becareful with the feel gauge, it may not be as accurate as you like to think that it is. Remember what we always say about the "butt dyno"?
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Senior User
Joined: Apr 2004
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From: Ohio
my 04 likes the 2100 rpm range around 70-72 MPH But when i drop to around 65mph and just about 2000 rpm I add about 1.5 miles per gallon trailering
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Hotshot
Joined: Jul 2005
Posts: 13,834
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From: Middle Tn.
Towing my 13k loaded 5er my truck likes right around the 2,000 to 2,100 mark. Good mileage and decent acceleration if I need it. 10 to 13 mpg towing the rig to the Sierras. Will usually average 11 going and about 13 on the return trip.
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Lead Driver
Joined: Sep 2005
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From: Norco,CA
Zhilton, I couldn't find Utah Tom I guess he's not listed anymore. I know gearing guys is one of my biggest problems. I have 35 inch tires and 3.73. I am going to change this in the near future. I am leaving tomorrow for the river it will be the first trip since the up grades wish me luck. I don't want any blown head gaskets, etc.. I hope I just curred that with the ARP's, bulletproof oil cooler bypass and EGR upgrade W/ CAT ELC and Shaeffer oil's and trans fuild. I guess I should keep it in forth if I have to to keep the RPM's up also. This sound right? Chet
Logistics Pro
Joined: Mar 2007
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From: Claremore, OK
Try this on for size...Ford Truck Enthusiasts Forums - View Profile: utahtom
Yeah, gearing is what makes a difference...but in your case your more than likely doing more damage to the 5R110 (assuming you've got the automatic) than the motor. To tell if your facing any issues...pay attention to if the truck is "hunting for a gear" when your running down the highway at the speed you want. Unless your running a manual tranny, you can't tell the truck to stay in 4th. I would for sure use the Tow/Haul mode on the tranny.
I know gearing guys is one of my biggest problems. I have 35 inch tires and 3.73. I am going to change this in the near future. I am leaving tomorrow for the river it will be the first trip since the up grades wish me luck. I don't want any blown head gaskets, etc.. I hope I just curred that with the ARP's, bulletproof oil cooler bypass and EGR upgrade W/ CAT ELC and Shaeffer oil's and trans fuild. I guess I should keep it in forth if I have to to keep the RPM's up also. This sound right? Chet
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
The thing you DON"T want to do is LUG the motor. 6.0's hate it. IMHO the EGT's are more important than ECT/EOT and more RPM's will keep the EGT's down towing. Just keep your eyes on the gauges and the motor/trans will tell you where the sweet spot is. Check in every chance you get with "news reports" on how your motor is doing. The 5R110 is one tough trans.