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Discussion Starter · #1 ·
At what mph do the stock trucks shut down ? I have been over 140 and it was still pulling hard ! Kinda got scared of getting caught by the troopers so I backed her down quickly. I know Yellow has to be the fastest ;)
 

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I don't beleive the truck has an speed limiter - it just hits terminal velocity based on it being a brick going 150mph+
 

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Drag calculated VS HP Required

These trucks are more drag limited than by anything else.



Drag Coefficient:0.43
Frontal Area:35.8
MPH Force (lbs) HP Required
10 3.9 0.1
20 15.4 0.8
30 34.7 2.8
40 61.8 6.6
50 96.5 12.9
60 138.9 22.2
70 189.1 35.3
80 247 52.7
90 312.6 75
100 386 102.9
110 467 137
120 555.8 177.8
130 652.3 226.1
140 756.5 282.4
150 868.4 347.4
160 988.1 421.6
170 1115.4 505.7
180 1250.5 600.2
190 1393.3 705.9
200 1543.8 823.4
210 1702.1 953.2
220 1868 1095.9
230 2041.7 1252.3
240 2223.1 1422.8
250 2412.2 1608.2
260 2609.1 1809
270 2813.6 2025.8
280 3025.9 2259.3
290 3245.9 2510.2
300 3473.6 2778.9

This model only takes into account wind drag nothing else, rolling resistance and/or tireslip.


Drag Coefficient (Cd) is a dimensionless number which represents the air drag of a vehicle.
 

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fstjack said:
This model only takes into account wind drag nothing else, rolling resistance and/or tireslip.

So when you soil your shorts at 150+mph, does that increase drag or is it just uncomfortable? :eek:


patrick
 

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mauiSRT/10 said:
So when you soil your shorts at 150+mph, does that increase drag or is it just uncomfortable? :eek:


patrick
:confused: :eek: :D
 

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I asked that question to the "Viper-certified" mechanic at the dealership when I picked up my truck a couple of days ago. I told him that I had noticed my hemi wouldn't go over (I think it was) 105 mph or so. He told me that they were set to shut off based on the tire rating. He said that with the SRT they (the tires) were rated I think somewhere in the high 140s. Does this sound right ? I have had bad luck so far. I picked up the truck at night. The next day I get on the highway to go to work and I am literally behind a trooper for twenty miles (at 60.0 mph). This morning it was pouring rain. I think I am going to have to wait for smmer before I can open it up. Has anybody tried to outrun a trooper yet? :eek:
 

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Ylw-Fvr said:
At what mph do the stock trucks shut down ? I have been over 140 and it was still pulling hard ! Kinda got scared of getting caught by the troopers so I backed her down quickly. I know Yellow has to be the fastest ;)
I've had the Silver Bullet, well over 160mph. It was a little light, but still handled great. Fuel Economy was around 6mpg.

The tires are rated at 168mph. There are only a few road tires that are rated higher.

Craig
 
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