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02-27-2014, 09:19 PM
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Ford Pickup
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Join Date: Nov 2010
Posts: 119
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Re: highway RPMs?
2500rpm at 70 mph. 2010 xlt 4x4 supercab 4dr
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2010 Ranger XLT 4X4, 5sp. Auto Trans, 4.0 SOHC V-6 4-dr extended cab. Mods: Tinted windows, sprayed in bed liner, and AVS BUG SHIELD.
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02-27-2014, 09:24 PM
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Over 100hp on a good day
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Join Date: Dec 2012
Posts: 591
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Re: highway RPMs?
Just keep your oil fresh.
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1995 Mazda B2300
2.3L Lima, 2WD, Automatic, 3.73 Open diff
MODS: Kenwood headunit, Pioneer 6x8s, LED dash lights, Throttle Cable Mod, '06 Mirror Swap, Rough Country 1.5 inch lift coils (4.0L), 15x8 Black Rocks, 30" General Grabber AT2s
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02-28-2014, 10:41 AM
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Liking the Ford Ranger Forum
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Join Date: Sep 2010
Posts: 24
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Re: highway RPMs?
I don't know about the rest of the trucks here but on my '01 the tach shows about 300 rpm too fast @ 70.
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02-28-2014, 11:03 AM
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Ford Ranger Driver
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Join Date: Jun 2011
Posts: 1,681
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Re: highway RPMs?
Quote:
Originally Posted by Brian550336
Hey I have a 04 4.0 with 4.10 rear and my local speed limit changed to 70mph and at 70 I'm running around 2500rpm. I was wondering will 2500-3000 rpm hurt the truck for a 1.5-2 hour drive?
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Fuck no!!! lol
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2003 Ford Ranger 4 Door 4x4 FX4 4.0L
2015 Ford Focus
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02-28-2014, 11:04 AM
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2019 SSVT Ford 'Maro
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Join Date: Jan 2013
Posts: 14,636
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Quote:
Originally Posted by 03RangerFX4
Fuck no!!! lol
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^^^^^^
Your gas mileage will be terrible
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02-28-2014, 11:33 AM
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Ford Ranger Driver
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Join Date: May 2012
Posts: 2,054
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Mine runs at 3k RPM's at 80mph.
3.0L with 4.10
At this point I could care less about gas mileage lol
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03-01-2014, 10:29 PM
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Pooping, on you
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Join Date: Feb 2014
Posts: 264
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Re: highway RPMs?
Everyone here seems to be full of shit.
When you plug in almost all the numbers being reported here into a rpm formula and compare it to what people post, no way.
Some of you are off by a full 1,000 RPMs.
However my guess is people here just have no clue how to read their tach. Too bedazzled by chrome and latest cosmetic gadgets bolted on.......
4.10 gears at 80mph with 235/75R15 (most common tires mounted) will pull 3,826 RPM. 33" tires bring it down to a whopping 3339 RPM.
Last edited by Boris; 03-01-2014 at 10:34 PM.
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03-01-2014, 11:16 PM
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I'm kind of a big deal
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Join Date: Nov 2009
Posts: 4,848
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Quote:
Originally Posted by Boris
Everyone here seems to be full of shit. When you plug in almost all the numbers being reported here into a rpm formula and compare it to what people post, no way. Some of you are off by a full 1,000 RPMs. However my guess is people here just have no clue how to read their tach. Too bedazzled by chrome and latest cosmetic gadgets bolted on....... 4.10 gears at 80mph with 235/75R15 (most common tires mounted) will pull 3,826 RPM. 33" tires bring it down to a whopping 3339 RPM.
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03-02-2014, 12:03 AM
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Ford Ranger Driver
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Join Date: Sep 2009
Posts: 4,197
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Re: highway RPMs?
Quote:
Originally Posted by Boris
Everyone here seems to be full of shit.
When you plug in almost all the numbers being reported here into a rpm formula and compare it to what people post, no way.
Some of you are off by a full 1,000 RPMs.
However my guess is people here just have no clue how to read their tach. Too bedazzled by chrome and latest cosmetic gadgets bolted on.......
4.10 gears at 80mph with 235/75R15 (most common tires mounted) will pull 3,826 RPM. 33" tires bring it down to a whopping 3339 RPM.
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It's good to know some bozo named Boris 2,500 miles away knows my truck better than I do. Or it's set up. Rather amazing skill you must have, sir...
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'01 XLT disguised as a '03 Fx4 Level II.
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03-02-2014, 07:30 AM
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Pooping, on you
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Join Date: Feb 2014
Posts: 264
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Re: highway RPMs?
Quote:
Originally Posted by camodown
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No anger, just laughter. This shit is hilarious.
FWIW, I am pulling 2050 RPM at 80 MPH. I dont give a shit how far away you live either. I know how my truck runs!
Im just amazed this thread made it so far without someone calling BS with even the most rudimentary concept of how a transmission revs compared to gear ratio to tire height. They taught that crap in highschool shop class. I remember it and that was over half my life ago.
If y'alls truck is pulling 3K at 80mph with 4.10s and normal tires, then you need to fix something, its broke.
Highschool math. Here is your actual RPM. Plug your numbers in.
rpm = (mph x gear ratio x 336) / tire daimeter
Last edited by Boris; 03-02-2014 at 07:35 AM.
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03-02-2014, 07:34 AM
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Liking the Ford Ranger Forum
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Join Date: Jul 2013
Posts: 22
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I'm running 2600rpm at 80mph in my 98 xlt 4x4.
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03-02-2014, 09:31 AM
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Ford Ranger Owner
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Join Date: Dec 2013
Posts: 69
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Re: highway RPMs?
So according to boring, I should be running 645 rpm at 70. Ummmm....ya right.
(Mph x gear x 336) / tire = rpm
So lets plug in the numbers.
Speed x 5th ratio x 236/75-15 = rpm
(70 x .79 x 336) / 28.8 = ?
(18,580.8) / 28.8 = 645.16
Uhhhh.. you wrong, brah.
I turn 2400 at 70
Go to Richmond gearing's online calculator and see what you get.
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You want a donut?
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03-02-2014, 09:32 AM
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ford dealer parts guy
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Join Date: Apr 2011
Posts: 20,938
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Quote:
Originally Posted by Boris
No anger, just laughter. This shit is hilarious.
FWIW, I am pulling 2050 RPM at 80 MPH. I dont give a shit how far away you live either. I know how my truck runs!
Im just amazed this thread made it so far without someone calling BS with even the most rudimentary concept of how a transmission revs compared to gear ratio to tire height. They taught that crap in highschool shop class. I remember it and that was over half my life ago.
If y'alls truck is pulling 3K at 80mph with 4.10s and normal tires, then you need to fix something, its broke.
Highschool math. Here is your actual RPM. Plug your numbers in.
rpm = (mph x gear ratio x 336) / tire daimeter
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You're so full of shit...seriously..my old ranger...80mph with factory tires 4.10s..3k rpm
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2021 F150 5.0 Screw
Past:18 F150 2.7, 16 F150 5.0, 14 F150 5.0, 07 F150 5.4, 03 Ranger 4.0
Master Certified Ford Parts / Warranty Admin
Last edited by djfllmn; 03-02-2014 at 09:35 AM.
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03-02-2014, 10:08 AM
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I'm kind of a big deal
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Join Date: Nov 2009
Posts: 4,848
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Quote:
Originally Posted by Rexter
So according to boring, I should be running 645 rpm at 70. Ummmm....ya right.
(Mph x gear x 336) / tire = rpm
So lets plug in the numbers.
Speed x 5th ratio x 236/75-15 = rpm
(70 x .79 x 336) / 28.8 = ?
(18,580.8) / 28.8 = 645.16
Uhhhh.. you wrong, brah.
I turn 2400 at 70
Go to Richmond gearing's online calculator and see what you get.
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Diff gear ratio. 3.73, 4.10, 4.56 ect.
I don't think that formula takes in account overdrive.
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03-02-2014, 10:10 AM
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Ford lover
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Join Date: Jan 2012
Posts: 7,058
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Quote:
Originally Posted by Boris
Everyone here seems to be full of shit.
When you plug in almost all the numbers being reported here into a rpm formula and compare it to what people post, no way.
Some of you are off by a full 1,000 RPMs.
However my guess is people here just have no clue how to read their tach. Too bedazzled by chrome and latest cosmetic gadgets bolted on.......
4.10 gears at 80mph with 235/75R15 (most common tires mounted) will pull 3,826 RPM. 33" tires bring it down to a whopping 3339 RPM.
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Yes, you are full of shit. You shouldn't be calling people stupid. We are all capable of reading a tach without a problem, there is no "Highschool" math involved. I know damn well that my truck runs at 2500-2600 RPMs at 70 MPH and it is not "broke". Good day sir.
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2003 Ford Ranger FX4: 4.0L V6 | Auto | 4.10s | 265/75R16 BFG AT KO2 | Ion Alloy 174 | Pioneer radio | Alpine Speakers| 06 tails | Thunderbolt turn signal mirrors | Kobalt Toolbox | 22" LED lightbar | Blackout headlights | Headache Rack | 140K miles. DWB!
Build Thread <-- Clicky
March 2015 TOTM
2016 Ford Fusion SE. 1.5L EcoBoost. 6-speed Auto. White Platinum Tri-Coat Metallic. 18" 5 spoke black rims. Daily Driver.
Quote:
Originally Posted by OhioMike
One can never have too many detailing supplies.
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