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01-16-2012, 09:36 AM
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#1
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Junior Member
Join Date: Jan 2012
Location: mn
Posts: 3
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RPM's related to MPH (speed)
I am looking to get some feed back on how fast peolpe drive while towing their campers AND what the engine's RPMs are.
I tow my current camper at 65 mph with the tach reading about 2600 RPMs. I have a 3.73 gear ratio with 4 speed auto transmission. I'm pulling in third gear. When I hit a upgrade the transmission down shifts to second gear and the tach reads 4200 RPMs at 65 mph.
How about yours??
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01-16-2012, 09:48 AM
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#2
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Senior Member
Join Date: Nov 2011
Location: SoCal
Posts: 1,739
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My sweet spot is 2500 RPMs, with 2000 RPMs being a quiet comfortable ride. At 60MPH in 4th gear, I’m in the low 2000 RPM range. Gear ratios don’t have *that* much to do with your sweet spot. If you can find a torque curve graph for your engine, that will probably reinforce what you already know.
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-Scott, DW, DG, DB, and DD
2011 Passport 2590BH
2009 Ford F150 SuperCrew F X4 5.4L w/Max Tow
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01-16-2012, 10:28 AM
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#3
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Member
Join Date: Dec 2010
Location: OHIO
Posts: 39
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we pull ours at around 55-60 depending on the road. Rpms just under 2k in tow
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Jeremy K.
2009 F-350 6.8L V-10 Long Bed
2002 Keystone Bobcat
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01-16-2012, 11:14 AM
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#4
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Senior Member
Join Date: Aug 2011
Location: WESTERN,CT
Posts: 2,095
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60 MPH IS MY LIMIT WITH THE BIG UNIT 1800RPM YEP DIESEL STILL QUIET AND LOADS OF TORQUE LEFT FOR THE HILLS. NICE SMOOTH RIDE
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BARNEY AND CHRISTINE
2010 MONTANA 3750FL
2005 DODGE 3500 DUALLY TD
2 RESCUE PUPS: SUSITNA AND CRYSTAL. RIP ALYESKA!
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01-16-2012, 12:06 PM
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#5
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Site Team
Join Date: Jun 2009
Location: Venice
Posts: 5,346
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1600 rpm @ 60mph in OD .... rarely use T/H ...... will run 65 under ideal conditions.
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Hank & Lynn
2007 Cougar 290RKS, E-Z Flex, 16" XPS RIBs ( SOLD .. Gonna miss her ... looking for new 5r)
2004.5 Dodge 2500 QC, LB, 5.9HO, WestTach gauges, Ride-Rite
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01-16-2012, 12:31 PM
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#6
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Senior Member
Join Date: Feb 2010
Location: Oswego Il
Posts: 820
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I tow my trailer between 60 and 65MPH, trailer tires are speed rated for 65 MPH. The Truck has a double OD in the transmission and 3:73 gears, I am running Michelin LT265/70R17 E121 tires. Tire size also is required for an RPM check.
In 6th gear the truck is around 1700RPM's and in 5ft gear the truck will be at 2000 RPM's. I will usually go to 5ft gear in the mountains to cool the EGT's down as the temp's will climb in 6 gear on 6 to 7% grade. I also watch my boost pressure and try to keep this under 30PSI when climbing.
Jim W.
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Jim & Jill
2010 318SAB Cougar
2008 Dodge 6.7LCummins the original 6.7L engine, w/68RFE Auto
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01-16-2012, 12:38 PM
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#7
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Senior Member
Join Date: Nov 2009
Location: Elkhart, Indiana
Posts: 420
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I normally run at 60 - 65 mph in 5th gear and run about 2000 rpm and will drop into 4th gear for step grades. I'm running a 5 speed Allison trans and 3:73 gears with 31.5 tall tires.
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Phil & Janine & Lady
2004.5 Chevy 2500HD Duramax LLY CC LB 4X4
2009 Keystone Sprinter 272RLS
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01-16-2012, 12:52 PM
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#8
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Senior Member
Join Date: Mar 2011
Location: Clearwater, Fl.
Posts: 220
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I tend to run between 58 (1700 rpm in 5th) and 62 MPH (1600 rpm in 6th) it all depends on wind conditions and terrain.
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Steve, Margo & April the campy Cocker
SOB Motorhome
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01-16-2012, 01:50 PM
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#9
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Senior Member
Join Date: Jan 2011
Location: wv
Posts: 504
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My 2005 dodge 3500 CTD SRW QC 5.9 HO runs about 1900 to 2100 rpm's at 60to 65 mph. with 4.10 gear.
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2002 Chevy Avalanche 5.3 k&n cold air intake
2011 keystone hideout 26b
New tv 2005 dodge lb ctd quad cab
New TT 2014 j@%$O 32BHDS
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01-16-2012, 02:07 PM
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#10
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Member
Join Date: Sep 2011
Location: Mississippi
Posts: 97
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If I get above 2K rpm I am going faster that I should. Typically about 1800 at 65 mph. Problem is that it will go 80 with just 500 more RPM and not even be noticeable. Right up until your on the side of the road changing a blowout!
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Exsailor from MS
2008 35 Ft Montana
2012 GMC Duramax Diesel
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01-16-2012, 05:22 PM
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#11
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Senior Member
Join Date: Nov 2010
Location: Herndon, VA
Posts: 394
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Rpm
I get about 1,700 RPM @ 59-62 MPH which is about my cruising speed.
John
__________________
2006 Dodge Cummins 3500 Mega cab, dually
2011Cougar 318SAB
Sidewinder hitch
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02-17-2012, 11:03 PM
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#12
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Member
Join Date: Feb 2012
Location: Ma-Me-O Beach, Alberta
Posts: 81
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100kph (65mph), about 1,850RPM unless in the mountains with OD locked out, then she'll tach up to about 2,500RPM. We just love our noisy, stinky old diesel.
Cheers!
Mike and Carol
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Regretfully SOLD as not enough truck for our new to us RV 1999 Dodge RAM 2500 SLT
Acquired 2017/05/05 - 2012 F350 Lariat CC SRW,
RV - 2008 Fleetwood REGAL 325RKS
Carol, My wonderful wife of 41 years
Kenzie Schweenie Tod, our furry faced Shih 't n Dash
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