Performance difference's between rear end ratios.
#1
Performance difference's between rear end ratios.
I've been keeping up with the latest in 2011 F-150 road tests and all that stuff. Here recently I've noticed something that I found a little intriguing. Recently there have been two fairly major road tests and comparison's that a 2011 F-150 was involved in. The particular truck I want to you take notice of in the first test ''which only includes F-150s'' is the one with the 5.0L V8. In the second test the only F-150 that was there to compete was one with the 5.0L.
The thing I find interesting is that the 2011 F-150 5.0L that was tested by Truck Trend ran a 0-60 of 6.9 seconds. Keep in mind that it was a 4X4 Crew Cab with a 3.73 rear end.
Now the one tested by Pickuptrucks.com was a regular cab 2WD 5.0L with 3.55 rear end...And it ran the same 6.9 second 0-60 as the much heavier Crew Cab 4WD F-150 with the 3.73 rear end.
Considering the weight difference I would have expected the 4X4 F-150 to noticeably slower perhaps 1/2 a second or so to 60? But instead it runs nose to nose with the lighter 2WD model...Does making the jump from 3.55 to 3.73 really yield that much extra performance?
I personally own a 2011 F-150 FX4 Supercab with the 5.0L and 3.73, and I even test drove an XLT 5.0L Supercab with 3.55's before I made my purchase. To me my 3.73 equipped truck maybe feels a little more punchy off the line...But really any real world difference seems negligible. Let me know what your thougts on the subject are.
#1
5.0-liter V-8 XLT SuperCrew 4x4 - 2011 Ford F-150 Comparison Test - Truck Trend
#2
http://special-reports.pickuptrucks.com/2011-30k-
shootout.html
Here's the spec's for the trucks tested in the order I've placed the tests above this.
#1
2011 Ford F-150 XLT SuperCrew 4X4
5.0L V8
3.73 Rear End
Curb Weight - 5640lbs
0-60 = 6.9 seconds
1/4 mile = 15.3 @ 93.30
#2
2011 Ford F-150 XLT Regular Cab 2WD
5.0L V8
3.55 Rear End
Curb Weight - 5,110lbs
0-60 = 6.9 seconds
1/4 mile = 15.4 @93.31mph
(530lbs difference in curb weight)
''Note''
For some reason Pickuptrucks.com neglected to include the spec's for the trucks used in their test. So I had to look up the curb weight online for a Regular Cab 2WD 5.0L F-150. The numbers may not be exact to the F-150 used in their test...However they are very close.
What do you think? Why did the almost 600lb heavier F-150 run the same 0-60mph time and almost identical 1/4 mile time and trap speed? Could this be due to gearing alone? Did the Crew Cab just have a hot engine or in vice versa the Regular Cab had an underachiver engine?
I've never personally run my 5.0 Supercab FX4 in a 0-60 or 1/4 mile so I can't speak for myself...But I did however watch a factory stock 5.0L regular cab 2WD F-150 run a 14.5 1/4 mile @ 95mph (Speed Limiter) and that particular truck had a 3.73 rear end.
The thing I find interesting is that the 2011 F-150 5.0L that was tested by Truck Trend ran a 0-60 of 6.9 seconds. Keep in mind that it was a 4X4 Crew Cab with a 3.73 rear end.
Now the one tested by Pickuptrucks.com was a regular cab 2WD 5.0L with 3.55 rear end...And it ran the same 6.9 second 0-60 as the much heavier Crew Cab 4WD F-150 with the 3.73 rear end.
Considering the weight difference I would have expected the 4X4 F-150 to noticeably slower perhaps 1/2 a second or so to 60? But instead it runs nose to nose with the lighter 2WD model...Does making the jump from 3.55 to 3.73 really yield that much extra performance?
I personally own a 2011 F-150 FX4 Supercab with the 5.0L and 3.73, and I even test drove an XLT 5.0L Supercab with 3.55's before I made my purchase. To me my 3.73 equipped truck maybe feels a little more punchy off the line...But really any real world difference seems negligible. Let me know what your thougts on the subject are.
#1
5.0-liter V-8 XLT SuperCrew 4x4 - 2011 Ford F-150 Comparison Test - Truck Trend
#2
http://special-reports.pickuptrucks.com/2011-30k-
shootout.html
Here's the spec's for the trucks tested in the order I've placed the tests above this.
#1
2011 Ford F-150 XLT SuperCrew 4X4
5.0L V8
3.73 Rear End
Curb Weight - 5640lbs
0-60 = 6.9 seconds
1/4 mile = 15.3 @ 93.30
#2
2011 Ford F-150 XLT Regular Cab 2WD
5.0L V8
3.55 Rear End
Curb Weight - 5,110lbs
0-60 = 6.9 seconds
1/4 mile = 15.4 @93.31mph
(530lbs difference in curb weight)
''Note''
For some reason Pickuptrucks.com neglected to include the spec's for the trucks used in their test. So I had to look up the curb weight online for a Regular Cab 2WD 5.0L F-150. The numbers may not be exact to the F-150 used in their test...However they are very close.
What do you think? Why did the almost 600lb heavier F-150 run the same 0-60mph time and almost identical 1/4 mile time and trap speed? Could this be due to gearing alone? Did the Crew Cab just have a hot engine or in vice versa the Regular Cab had an underachiver engine?
I've never personally run my 5.0 Supercab FX4 in a 0-60 or 1/4 mile so I can't speak for myself...But I did however watch a factory stock 5.0L regular cab 2WD F-150 run a 14.5 1/4 mile @ 95mph (Speed Limiter) and that particular truck had a 3.73 rear end.
#3
I'd believe it - gearing is a huge part of straight line acceleration. Think of timing 0-20 MPH from a stop in 1st gear vs starting in 2nd gear. It's about getting to and keeping the motor in it's power band. I would think the 5.0 would be more gear sensitive than the EB simply because of the power band - 5.0 makes peak torque and HP higher in the RPM range so that first to second gear time would probably account for a good chunk of ET not running in the ideal power band - then at the end of the run where wind resistance plays a larger part the 3.73 is also helping.
#4
#6
#7
The gearing explains it... Lower gears apply more torque at a lower speed to the rear wheels, which will provide more acceleration. Pair that with a heavier vehicle and the lower gears will attain similar acceleration to a lighter vehicle with taller gears, though at the cost of highway mileage and top speed.
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#8
The gearing explains it... Lower gears apply more torque at a lower speed to the rear wheels, which will provide more acceleration. Pair that with a heavier vehicle and the lower gears will attain similar acceleration to a lighter vehicle with taller gears, though at the cost of highway mileage and top speed.
This is the only reason for my post.
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