RPMs at 60
Elder User
Joined: Jan 2004
Posts: 920
Likes: 2
From: Colville
My 01 250 with 3.73s came stock with 235-85-16s. I replaced them with 255-85-16s. I got pulled over once and the oficer swore he clocked me at 67 I had the cruise set at 62-63. 255-85s are only slightly taller than 285-75s. I have never had the spedo recalibrated, wich also throws off your gas millage if your going by the odometer than your actually getting better millage. I'm traveling about an extra 10 miles for every 100 on the odometer.
Senior User
Joined: Feb 2004
Posts: 299
Likes: 0
From: greenland
Originally posted by Waha
I have a 2004 F250 w/3.73:1 , 4sp Auto , 285/75/16.
1650 RPM @ 60 MPH. 13.5 MPG.
Anything over that, the MPG goes down to 10-11.
I have a 2004 F250 w/3.73:1 , 4sp Auto , 285/75/16.
1650 RPM @ 60 MPH. 13.5 MPG.
Anything over that, the MPG goes down to 10-11.
Elder User
Joined: Jan 2004
Posts: 920
Likes: 2
From: Colville
I believe that I have read elsewhere on the FTE site that the superchip does not recalibrate the speedo on the SD V-10. Superchips does on some models but not on the SD. You will need to find out specificly for your model.
Elder User
Joined: Feb 2004
Posts: 946
Likes: 4
From: Orange
Here's a link to show what all the info on speed vs rpm for various tire sizes and gear ratios.
http://www.csgnetwork.com/rearendgearcalc.html
Here's another for tire sizes, in case you don't know exactly how tall yours are:
http://www.miata.net/garage/tirecalc.html
http://www.csgnetwork.com/rearendgearcalc.html
Here's another for tire sizes, in case you don't know exactly how tall yours are:
http://www.miata.net/garage/tirecalc.html
New User
Joined: Feb 2004
Posts: 23
Likes: 0
Re: RPMs at 60
Originally posted by swanee
Considering getting V10 and was curious as to how many RPMs engine turns at 60 in overdrive. Currently have 92 460 and love the fact that 1800 gets me 60. Please include rear ratio. Thanks
Considering getting V10 and was curious as to how many RPMs engine turns at 60 in overdrive. Currently have 92 460 and love the fact that 1800 gets me 60. Please include rear ratio. Thanks
Senior User
Joined: Nov 2003
Posts: 164
Likes: 1
From: Upper Saddle River, NJ
Originally posted by BASSER
hey running a , V10 with a 4;30Ls at 75mph, rpm is 2300
hey running a , V10 with a 4;30Ls at 75mph, rpm is 2300
Bill
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Freshman User
Joined: Jan 2003
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From: Mission Viejo
I'm having 5.13's installed right now.I pick it up tomorrow.I'll let you know how it works out.With the 38's it was killing me pulling my toy hauler up the big grades fully loaded.I had 4.30's before and it was great with the 38's without the trailer.
Elder User
Joined: Nov 2001
Posts: 621
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From: S.W. Oregon
My rpm's vary but around 1800 at 60mph. My truck gets about 12mpg on normal freeway driving. If I am on flat open road and set the cruise at 75 - 80 for a long distance, I get 14+ mpg. My truck really seems to like the higher rpms for some reason.
Senior User
Joined: Feb 2004
Posts: 299
Likes: 0
From: greenland
i have an 04 v10 373 gears i installed 285 75 16 tires if i have my computer reflashed to correct my speedo will this also affect the tach lowering the rpm's or doesnt that matter changing tire sizes ?
