2012 Mustang 5.0 Top Speed
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Discussion Starter · #1 · (Edited)
I have a 2012 GT and I have no governor or rev limiter. I have successfully hit about 165 before backing off because well, stangs dont handle so well at high speeds. So I was wondering what top speed would be possible with that car. I don't plan on ever going that fast again. I'm just curious what it's max is.
EDIT: I WAS NOT ON A PUBLIC ROAD. SO PLEASE DONT GIVE ME GRIEF!!!!
Edit: everything is stock except for rear suspension and control arms.
Edit 3: so I had a new trans installed. In which I replaced the rear end and driveshaft. I took it to the same place I tested before and topped out at 176.85. so I got my answer. Thank you all for your Input. Do with this info as you please.
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I have a 2012 GT and I have no governor or rev limiter. I have successfully hit about 165 before backing off because well, stangs dont handle so well at high speeds. So I was wondering what top speed would be possible with that car. I don't plan on ever going that fast again. I'm just curious what it's max is.
Not sure that deserves an answer, but it seems I've read that it is around 170, drag limited.
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Not sure that deserves an answer, but it seems I've read that it is around 170, drag limited.
I don't know either, but there's nothing wrong with the question. Accurate information exchange is always good. That way, our law abiding users here won't feel the need to find out personally. :smile:
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The 2014 GT will go really fast.
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The 2014 GT will go really fast.
LOL my thoughts exactlyfox.gifsCH_copcar.gif
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I have a 2012 GT and I have no governor or rev limiter. I have successfully hit about 165 before backing off because well, stangs dont handle so well at high speeds. So I was wondering what top speed would be possible with that car. I don't plan on ever going that fast again. I'm just curious what it's max is.
Should have just continued on and went for it. At that point you were already going to jail if you got caught. hahaha The difference in 165 and 175, 185, 195, 205, or hell 300 is no different. Going as fast as you were would land you in the back of a cop car for sure.
I wouldn't know this answer as my balls are not big enough to drive that fast for many reason like I don't like the idea of jail and don't like the idea of death. hahahah However with that said if I recall my 2011 GT Speedo didn't even go past 160. How you know you were doing 165? Most cars that are stock won't go faster than their speedos. Most won't get to the max as if it reads 160 then 155 would be my guess. Ironically after googling I find 155 in a few places for the 2012.
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Should have just continued on and went for it. At that point you were already going to jail if you got caught. hahaha The difference in 165 and 175, 185, 195, 205, or hell 300 is no different. Going as fast as you were would land you in the back of a cop car for sure.
I wouldn't know this answer as my balls are not big enough to drive that fast for many reason like I don't like the idea of jail and don't like the idea of death. hahahah However with that said if I recall my 2011 GT Speedo didn't even go past 160. How you know you were doing 165? Most cars that are stock won't go faster than their speedos. Most won't get to the max as if it reads 160 then 155 would be my guess. Ironically after googling I find 155 in a few places for the 2012.
Garmin GPS.
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I prefer not to get into a discussion regarding the ethical considerations about high speed runs on public roads. Clearly they are best done on closed courses where public safety isn't a consideration. That said, there are no doubt some public roads where high speeds can be done without endangering anyone besides yourself. With that disclaimer out of the way here are some numbers to consider. All of these numbers unless otherwise stated are computed using a 27 inch diameter tire [ standard GT size ] and standard 3.31 rear end gears. I am also assuming that we are talking about a MT82 manual transmission and 5th. gear [ 1:1 ]. Assuming stock Gen 1 connecting rods and stock cams and valve springs I think 7,200 rpm is the maximum safe rpm limit. At 7,200 rpm top speed is 174.7 mph assuming that aerodynamic drag will allow it. Keep in mind that both aerodynamic down force [ which we don't have ] and aerodynamic drag of which we have a lot increase at the square of speed. Basically at these speeds it takes a big increase in power to get another 5 mph unless you find a way to reduce drag. My understanding is that the factory top speed limiter is set at 145 mph. With 3.31 gears 145 mph is 5,975 rpm, with 3.55's it's 6,408 rpm and with 3.73's it's 6,733 rpm [close to the factory rpm limit]. With 3.55 gears top speed at 7,200 rpm is 163 mph. With 3.73's and 7,200 rpm it's 155 mph. One last point. I think the speedometers/odometers on modern cars are much more accurate than the mechanically driven ones on older cars, but they still aren't perfectly accurate and the error tends to get worse as speed increases so don't take a high speed reading as being perfectly accurate.
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Discussion Starter · #9 ·
I was on a track. Dear Lord I would never go that fast on a public road.
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662 hp in a 2013 body will get you 200mph.>
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662 hp in a 2013 body will get you 200mph.>
203mph if its red.
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I don't think I have ever seen an absolute answer on this, but my guess is the same as above, "about 170 MPH, drag limited"
and it absolutely would depend on gearing because you need to be right at the absolute top of the powerband when approaching the absolute top speed
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stupid computer won't let me like Mac's post so here it is:
Like :smile:
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I was on a track. Dear Lord I would never go that fast on a public road.
I have heard you can do it with no worries or issue on public roads in Mexico. haha :wink: I haven't been there to get the opportunity to try, but that is what I have heard and read on multiple sources. haha
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I was on a track. Dear Lord I would never go that fast on a public road.
Yeah, I'm guilty of jumping to a conclusion -- sorry!
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203.2 if you install an eight inch antenna.:grin:
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The talk of calculations reminds me of my 85 GT many years ago. Had that blasted 85mph speedometer and this was many years before GPS so I had to use the tach for high speed runs. I had done the calculations and memorized the speeds at various RPMs. Yes, I was much younger and it was a public highway but 4 lanes that had very little traffic, at times you could drive for five minutes without ever seeing another car. Nothing but fields and rock cuts.....and maybe the car that had challenged you. Depending upon wind, going up or down hill, it would top out 136 to 140. I seem to remember that Road And Track tested a brand new one at 142. Very, very stable at those speeds.
Previous to that one, I had an 82 with 200CI 6 banger that would hit 98-99, couldn't coax it to the century mark.
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This talk of more horsepower getting a higher top end is hogwash! RPM is RPM More horses will get you there faster or allow you to change to a numerically lower gear (which changes the entire equation spelled out in an earlier post). On older muscle car ( yes I'm that old) it was a bit different most if not all "SOUPED" up motors were also partially or fully balances and had valve train work done allowing the engine to rev higher than its stock configuration. Also the higher horse power allowed the huge front areas of those cars to be pushed through the air at higher speeds.
Air drag is the big killer on a ton of cars, I remember an article on the Carrera 911 turbo in 75 or 76 our german buddies figures out that the stock bodied 911 would max out the engine at 163mph and then they have to near double the horse power to get another 5 mph. hence the 3.0 liter turbo!
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This talk of more horsepower getting a higher top end is hogwash! RPM is RPM More horses will get you there faster or allow you to change to a numerically lower gear (which changes the entire equation spelled out in an earlier post). On older muscle car ( yes I'm that old) it was a bit different most if not all "SOUPED" up motors were also partially or fully balances and had valve train work done allowing the engine to rev higher than its stock configuration. Also the higher horse power allowed the huge front areas of those cars to be pushed through the air at higher speeds.
Air drag is the big killer on a ton of cars, I remember an article on the Carrera 911 turbo in 75 or 76 our german buddies figures out that the stock bodied 911 would max out the engine at 163mph and then they have to near double the horse power to get another 5 mph. hence the 3.0 liter turbo!
I think the last 2 sentences contradicted your first. They didn't change gearing to get that extra 5 MPH, they increased horsepower.
Yes drag is the killer and the problem is that it is non linear: the higher the speeds, the more horsepower you need to increase speed. Twice as much horsepower doesn't get you twice as much speed. Takes more horsepower to reach top RPMs. Very, very few cars will hit redline at top speed.
I remember a pickup truck with 6 banger that turned about 5,500 tops, the truck would only it about 85 on top end. Guy replaced 6 banger with big block that turned about 5,400. Truck not only got there faster, it got further...topping out about 110 with same gearing.
Increase horsepower, you increase the ability to overcome drag and increase your top speed.
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Yes drag is the killer and the problem is that it is non linear:
Which is exactly why theoretical top speed discussions are pointless.
Source: https://www.allfordmustangs.com/forums/2011-2014-mustang-talk/1074795-absolute-top-speed-2012-gt.html
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