Distance needed for top speed?

[c-rizzle]

The 2013 GT500 dropped the ratio from 3.55/3.73 to 3.31 to give it a 202 mph max speed. Granted it had 662hp, but its not too different of a car.... still a Mustang. That said, it also came with a 1-piece driveshaft which is supposedly needed for much past 150mph.

You only need about 1/4 mile to get to about 120mph... the problem is you need room to slow down! ;)

Sponsored

 

[Grintch]

It has nothing to do with Torsen, everything to do with shorter gearing PP has. It's pute math, everything else being the same, there's theoretical maximum speed with engine RPM your car can achieve. Taller the final drive ratio, higher the speed. PP has the _shortest_ ratio.

But a PP will do 232 in 6th, IF it could pull it and you removed the limiter. And you had the 30 miles to accelerate.

But yes, the Torsen diff is not a factor.

 

[kz]

But a PP will do 232 in 6th, IF it could pull it and you removed the limiter. And you had the 30 miles to accelerate.

But yes, the Torsen diff is not a factor.

Yes - but if it's going slower than non-PP, then the issue has to be gearing vs. aerodynamics / engine power / torque.

 

[TheReaper]

But a PP will do 232 in 6th, IF it could pull it and you removed the limiter. And you had the 30 miles to accelerate.

But yes, the Torsen diff is not a factor.

This is BS.

 

[5-OH]

Only needs a few hundred feet to get to a top speed of 55 mph

 

[Rob00GT]

So what you're saying is my heavy convertible is actually faster than a coupe with performance pack? Sweet!

As recorded by my Garmin, my ragtop will do 155 in fifth. Still pulling when it hit the limiter.

 

[kz]

This is BS.

It's (I am guessing) theoretical calculation of max engine RPM at redline vs. drive ration in 6th gear, in a perfect vacuum with no drag and no drivetrain losses.

 

[SJulian10mm]

Iv had my GT PP (bone stock) to 160+ twice on a 12,000ft runway, though I used one of the taxiways for some run up (about 50mph), kept my foot in it till the 2000ft Distance Remaining Marker then lifted. We have 15,000 feet of straight line pavement if you include the overruns (1500ft each), but hitting those semi-flush thresh-hold lights at any serious speed might not be so good.

Benefits of being an Airport Manager

 

[JohnD]

You ever see a hipster wearing flannel and huge beard, but he's never left the city, doesn't know the difference between an axe and a maul, and generally can't survive without a cell phone? I feel like I'm reading that visual right now lol.

But hey, at least you're learning.

LOL!!!

 

[Emt1581]

You ever see a hipster wearing flannel and huge beard, but he's never left the city, doesn't know the difference between an axe and a maul, and generally can't survive without a cell phone? I feel like I'm reading that visual right now lol.

But hey, at least you're learning.

Not sure how I missed this one. But you couldn't be more off in your assessment... ;)

From the top...

I don't own any flannel, am clean shaven, hate HATE cities, heat my home with only a wood stove and process my own wood so I've got both an axe and a maul...and 2 splitters and a Husky 550XP, didn't have my first cell phone until undergrad so I survived just fine without one.

Don't worry...you're still learning.

-Emt1581

 

[Grintch]

It's (I am guessing) theoretical calculation of max engine RPM at redline vs. drive ration in 6th gear, in a perfect vacuum with no drag and no drivetrain losses.

Which is why I said "IF you can pull it, and if you remove the limiter".

It's the speed you WOULD see in 6th, IF you were at redline.
It would probably take 1000hp or more to do it.

 

[TheReaper]

Iv had my GT PP (bone stock) to 160+ twice on a 12,000ft runway, though I used one of the taxiways for some run up (about 50mph), kept my foot in it till the 2000ft Distance Remaining Marker then lifted. We have 15,000 feet of straight line pavement if you include the overruns (1500ft each), but hitting those semi-flush thresh-hold lights at any serious speed might not be so good.

Benefits of being an Airport Manager

Did you notice a weird smell after the run, like an oily/electrical smell ?

 

[Norm Peterson]

Judging by the vids I've seen of S550's on the Autobahn, seems like 167mph is the top speed, at least on GT's. I had previously thought it was 155mph.

Whichever it is, what kind of distance is needed to get these cars up that fast?

From a standing start I'd plan on needing at least 3 miles to get within 1 mph of true top speed. That last 1.0 mph could take as much as another 3 miles - needing several hundred feet to gain only 0.1 mph is that aerodynamic "wall" that you won't see coming until you run up against it (where forward acceleration drops below 2 mph per minute). That's my rough (but semi-educated) estimate.


Norm

 

[Grintch]

From a standing start I'd plan on needing at least 3 miles to get within 1 mph of true top speed. That last 1.0 mph could take as much as another 3 miles - needing several hundred feet to gain only 0.1 mph is that aerodynamic "wall" that you won't see coming until you run up against it (where forward acceleration drops below 2 mph per minute). That's my rough (but semi-educated) estimate.


Norm

Well it depends on the limiting factor.

If you have a limiter or are rpm limited, you could hit that rather quickly.
If you are drag limited, and can pull to or beyond the power peak that will take longer.
But if you are drag limited and CAN'T pull to the power peak (like us in the very tall 6th, if the stock limiter is disabled), that will take a LONG time to reach the peak speed.

 

[SJulian10mm]

Did you notice a weird smell after the run, like an oily/electrical smell ?

No but both times I cruised around other parts of the airfield at 30-50mph before stopping....cool down

Sponsored