Max speed No rev or speed limit
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#3
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Its actually 90-95MPH in most Ranger computers, called the Speed Limiter, all engine computers have these, not a Ranger or Ford thing, it cuts down fuel flow, doesn't cut it off completely
With larger tire diameter you can get to 100MPH which computer thinks is 90MPH because speedometer is off 10MPH at that speed
There is also an RPM limiter, usually 3,000RPMs when stopped, and then just above max RPM for the engine when moving, although you will usually float the valves at that time anyway
If your going downhill then not much the computer can do about max speed, lol, so have at it
Without the speed limiter a stock Ranger could do close to 120MPH from what I have read when people disable speed signal or reprogram computer and eliminate the speed limiter
I think my tires are only rated for 90MPH in any case so....................I won't be testing my limiter
To answer the question:
4.10 axle
28" tires
.79 ratio(overdrive on the M5R1)
engine RPMs at 4,700
You would be going 120MPH
In 4th gear, 1:1 ratio, engine would be at 5,900RPM at 120MPH
Calculator here: https://www.crawlpedia.com/rpm_gear_calculator.htm
These calculations are based on gears, RPMs and ratios so engine size doesn't matter
With larger tire diameter you can get to 100MPH which computer thinks is 90MPH because speedometer is off 10MPH at that speed
There is also an RPM limiter, usually 3,000RPMs when stopped, and then just above max RPM for the engine when moving, although you will usually float the valves at that time anyway
If your going downhill then not much the computer can do about max speed, lol, so have at it
Without the speed limiter a stock Ranger could do close to 120MPH from what I have read when people disable speed signal or reprogram computer and eliminate the speed limiter
I think my tires are only rated for 90MPH in any case so....................I won't be testing my limiter
To answer the question:
4.10 axle
28" tires
.79 ratio(overdrive on the M5R1)
engine RPMs at 4,700
You would be going 120MPH
In 4th gear, 1:1 ratio, engine would be at 5,900RPM at 120MPH
Calculator here: https://www.crawlpedia.com/rpm_gear_calculator.htm
These calculations are based on gears, RPMs and ratios so engine size doesn't matter
Last edited by RonD; 04-03-2019 at 03:27 PM.
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#9
I dropped in a Mazda 6 2.0 duratec, put the 2.3 crank and pistons in, new forged Piston heads, new rings, pretty much new engine, crank is good, new forged rods extra 15mm thick from stock, gonna drop in my turbo charger and tune from there, at Dyno I make 164 HP 160 ft lbs at peak
Peak hp 5350
Peak ft/lbs 3100
Peak hp 5350
Peak ft/lbs 3100
#11
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You need to add/build a SuperBird nose for your Ranger, lol
https://st.hotrod.com/uploads/sites/...-nose-cone.jpg
The 4ft high spoiler is optional: https://i.kinja-img.com/gawker-media...8026660756.jpg
A Rangerbird
https://st.hotrod.com/uploads/sites/...-nose-cone.jpg
The 4ft high spoiler is optional: https://i.kinja-img.com/gawker-media...8026660756.jpg
A Rangerbird
#12
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#16
#17
#18
Dropped a Shelby GT 5.2 525 hp engine in the front of my Ranger, for speed, and a 2017 V-10 3 valve in the bed for torque. Simple swap...took 7 hours, roll of Gorilla Tape, 2 bottles of Gorilla Glue, sawzall and adjustable wrench, about $18 bucks of assorted galvanized hardware, and fresh rear blinker fluid. Figured it would be good for 187 to 194 mph. Unfortunately upon hitting gas pedal, only got 17 1/2 feet...torque from the V-10 twisted the entire rear frame behind the cab 90 degrees.
Threw the whole kit n kaboodle in the trash can.
Grumpaw
Threw the whole kit n kaboodle in the trash can.
Grumpaw
Last edited by Grumpaw; 04-12-2019 at 09:54 AM.
#19
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All engines are self powered air pumps, to maintain the self powered part they need to be able to SUCK in a new air:fuel mix on every intake stroke, which means that on the intake stroke there must be a negative pressure inside the cylinder that SUCKS in the new air:fuel mix.
2001-2003 Mazda L 23NS is the the 2.3l Duratec, max HP is at 5,050rpm so I would think around 6,500rpm you would hit 0 Vacuum in the intake, valves floating, so no new fuel can be pulled in
And at this time compression is virtually 0 psi, so no power increase
Unless something is broken no factory engine would run out of fuel or air before it hit 0 Vacuum
I would check at Mazda Forums, as the Mazda L 23EW was, of course, used more in Mazda cars and they will have more specific data.
Fords 2001-2003 version was a little different than the 2004 and up, it had IMRC added so not sure if that would effect vacuum at higher RPMs
Once you can establish maximum RPM then you can use gear ratios and tire size to establish max speed at that RPM
2001-2003 Mazda L 23NS is the the 2.3l Duratec, max HP is at 5,050rpm so I would think around 6,500rpm you would hit 0 Vacuum in the intake, valves floating, so no new fuel can be pulled in
And at this time compression is virtually 0 psi, so no power increase
Unless something is broken no factory engine would run out of fuel or air before it hit 0 Vacuum
I would check at Mazda Forums, as the Mazda L 23EW was, of course, used more in Mazda cars and they will have more specific data.
Fords 2001-2003 version was a little different than the 2004 and up, it had IMRC added so not sure if that would effect vacuum at higher RPMs
Once you can establish maximum RPM then you can use gear ratios and tire size to establish max speed at that RPM
Last edited by RonD; 04-12-2019 at 10:00 AM.
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