I always get a kick out of the 1/4 mile guys. You hit 120/130 and freak. I enter turn one at Cal speedway at 155 and sustain 145 through turn one and two. Turn 8 at Willow springs is a sustained 140. A pebble at 130 does not put you in the ditch. In stock form the SN95 does generate quite a bit of lift over 120. somewhere in the 300 lb range. Add in a front splitter, Rear wing and a defuser and the cars are good to 200+. Granted you need 600+ HP to get 200+ but the cars will do it. Just never do it on the street or highway. Always run on a closed corse with all the safety equipement.
Top Speed with a KB 2.1
- Thread starter Alfredo E
- Start date
Stan Weiss
Member
You can see where at about 5230 RPM it takes more force to push the vehicle than is available at the wheel.
Code:
Acceleration and Top Speed Prediction Chart.
Force Aero Rolling Elapsed Accele
RPM MPH Velocity Motor @ dynamic Resist. Time Total ration
ft/sec Torque Wheel Drag - HP HP (ET) Distance in G's
>>>>--- Gear Change 5
4154.3 127.05 186.344 472.7 566.2 108.062 18.804 23.8291 2962.658 .052
4200.0 128.45 188.396 475.0 568.9 111.672 19.011 25.0751 3196.136 .051
4250.8 130.00 190.672 477.5 571.9 115.769 19.241 26.4919 3464.659 .049
4300.0 131.51 192.882 480.0 574.9 119.840 19.463 27.9039 3735.457 .048
4400.0 134.57 197.367 485.0 580.9 128.397 19.916 30.8953 4319.222 .045
4414.3 135.00 198.006 485.7 581.7 129.648 19.981 31.3363 4406.407 .045
4500.0 137.63 201.853 490.0 586.9 137.352 20.369 34.0765 4954.306 .042
4547.5 139.08 203.983 489.1 585.7 141.747 20.584 35.6848 5280.670 .040
4577.8 140.00 205.340 488.4 585.0 144.595 20.721 36.7616 5501.046 .038
4600.0 140.69 206.338 488.0 584.5 146.713 20.821 37.5822 5669.972 .037
4700.0 143.74 210.824 486.0 582.1 156.491 21.274 41.6218 6512.777 .032
4741.3 145.01 212.674 485.2 581.1 160.648 21.461 43.4885 1.3084 .030
4774.0 146.01 214.143 484.5 580.3 164.000 21.609 45.0729 1.3724 .028
4800.0 146.80 215.310 484.0 579.7 166.694 21.727 46.4040 1.4265 .027
4806.5 147.00 215.601 483.9 579.5 167.372 21.756 46.7479 1.4406 .026
4839.3 148.00 217.070 483.2 578.7 170.817 21.904 48.5546 1.5146 .024
4872.0 149.00 218.539 482.6 578.0 174.308 22.053 50.4997 1.5948 .023
4900.0 149.86 219.795 482.0 577.3 177.331 22.179 52.2902 1.6692 .021
4904.8 150.01 220.008 481.9 577.2 177.847 22.201 52.6070 1.6823 .021
4937.5 151.01 221.477 481.3 576.4 181.434 22.349 54.9074 1.7785 .019
4970.0 152.00 222.935 480.6 575.6 185.040 22.496 57.4211 1.8843 .017
5000.0 152.92 224.281 480.0 574.9 188.411 22.632 59.9915 1.9932 .015
5002.0 152.98 224.371 479.9 574.8 188.637 22.641 60.1729 2.0009 .015
5002.8 153.00 224.404 479.8 574.7 188.722 22.644 60.2413 2.0038 .015
5035.5 154.00 225.873 477.9 572.3 192.453 22.793 63.4842 2.1421 .013
5068.3 155.01 227.342 475.9 570.0 196.232 22.941 67.3572 2.3083 .011
5100.0 155.98 228.766 474.0 567.7 199.943 23.085 72.0054 2.5091 .008
5100.8 156.00 228.800 474.0 567.7 200.032 23.088 72.1295 2.5145 .008
5133.5 157.00 230.269 472.0 565.3 203.909 23.236 78.4874 2.7909 .006
5152.3 157.58 231.110 470.9 564.0 206.152 23.321 83.3317 3.0026 .005
5166.3 158.00 231.738 470.0 562.9 207.837 23.384 87.9318 3.2042 .004
5198.3 158.98 233.174 468.1 560.6 211.723 23.529 106.1208 4.0054 .001
5199.0 159.00 233.207 468.1 560.6 211.815 23.533 106.8372 4.0370 .001
5200.0 159.04 233.252 468.0 560.5 211.937 23.537 107.8352 4.0811 .001
5212.8 159.43 233.824 467.2 559.6 213.500 23.595 129.4093 5.0356 .000
5217.3 159.56 234.026 467.0 559.3 214.053 23.615 153.8252 6.1174 .000
5218.5 159.60 234.082 466.9 559.2 214.207 23.621 176.8488 7.1380 .000
5219.0 159.62 234.104 466.9 559.2 214.268 23.623 216.7288 8.9061 .000
5231.8 160.01 234.676 466.1 558.2 215.843 23.681
5264.3 161.00 236.134 464.1 555.9 219.890 23.828
5297.0 162.00 237.603 462.2 553.6 224.020 23.976
5300.0 162.09 237.738 462.0 553.3 224.401 23.990
170mph in a basically stock horsepower car....not unless you were being pushed by a Z06 after 140mph!
must have been me
my car doesn't do much more than 175-180, so this is impossible, and I have topped out a PI 2v car, or two, over the years. The stock speedo is not that accurate, and you can't get anywhere near that with 240-270rwhp.
Did you forget to recal your speedo or something?
There is no way in hell you hit 170, n/a, especially in a brick-of-a-car-called-a-Mustang. Don't get me wrong, but it isn't like a Mustang is the most aerodynamically designed car. I did 145 in my car, full bolt ons (no cams), and it was getting spooky at that point. To tell me you did 25mph more calls for the
Winters' Vette barely gets that high, and his car is superior to the Mustang in every away (power/weight, aero, etc).
some of you are funny. I've had mine up to 150mph on several occasions, all in the middle of the night on a clear freeway with no entrances for miles and miles. And up to 130-ish on a road course several times. That's bone stock except for tires. The car was fine. In fact, the faster I went, the more stable it felt. No supercharger, so can't help the OP.
If your car feels unsafe over 100, then by all means don't go that fast before you get it fixed. If the car feels fine but you get scared, then don't go that fast yourself. It's a rational fear. The fear is mostly unwarranted, but bad things happen quick at that speed. Some of us regularly drive 80-90 mph just getting to work in traffic (Chicagoland commute) and that's surrounded by cars going the same speed. 130mph blasts on an open freeway late at night is arguably safer for all involved
Consider the mass of the better part of two tons barrelling down a road. In order to "toss it in the ditch," you'd have to have a force capable of affecting that almost two tons. Inertia laughs at a little rock in the road given the kind of force being applied at that speed. Mass times velocity says that rock had better be pretty damn big before it's going to make a damn bit of difference in the trajectory of the car.
If your car feels unsafe over 100, then by all means don't go that fast before you get it fixed. If the car feels fine but you get scared, then don't go that fast yourself. It's a rational fear. The fear is mostly unwarranted, but bad things happen quick at that speed. Some of us regularly drive 80-90 mph just getting to work in traffic (Chicagoland commute) and that's surrounded by cars going the same speed. 130mph blasts on an open freeway late at night is arguably safer for all involved
Consider the mass of the better part of two tons barrelling down a road. In order to "toss it in the ditch," you'd have to have a force capable of affecting that almost two tons. Inertia laughs at a little rock in the road given the kind of force being applied at that speed. Mass times velocity says that rock had better be pretty damn big before it's going to make a damn bit of difference in the trajectory of the car.
Thanks for your opinions, I respect ‘em, but I don’t agree with all of them (i.e. “…top speed is a childhood stat, something that matters when you don't know a lot about cars…”. I respect it, anyway).
I run the car in 2001 (with aprox. 10.000 miles in the odometer, totally stock, except for a K&N air filter) at 154 mph GPS measured, in a clear winter morning, clear freeway with no entrances, for about 5 miles. The car was fine and easy to drive in that conditions.
Recently, I was invited to turn in a local speedway, and the Mustang (supercharged) was fine too, but I didn’t run over 150 mph at anytime.
If I would suppose that I can go faster than 150mph safely, with stock tires, no chassis, brake or suspension mods… I just push gas pedal and see what happens…. But I don’t have suicidal tendencies.
Now, I only wanted to know, if somebody hit top speed with a supercharged 4.6 (or other mods that give 400+ hp). I guess that other parts wouldn’t be bone stock.
Thanks again for all of you guys!!!
PD: excuse me for my English, it isn’t very good.
I run the car in 2001 (with aprox. 10.000 miles in the odometer, totally stock, except for a K&N air filter) at 154 mph GPS measured, in a clear winter morning, clear freeway with no entrances, for about 5 miles. The car was fine and easy to drive in that conditions.
Recently, I was invited to turn in a local speedway, and the Mustang (supercharged) was fine too, but I didn’t run over 150 mph at anytime.
If I would suppose that I can go faster than 150mph safely, with stock tires, no chassis, brake or suspension mods… I just push gas pedal and see what happens…. But I don’t have suicidal tendencies.
Now, I only wanted to know, if somebody hit top speed with a supercharged 4.6 (or other mods that give 400+ hp). I guess that other parts wouldn’t be bone stock.
Thanks again for all of you guys!!!
PD: excuse me for my English, it isn’t very good.
Thinks to consider...you didn't specify whether it was the KB base kit (which is non intercooled and rated at considerably less horsepower), or their intercooled kit (which even though advertised at 400hp, generally makes closer to 370-380hp). This is of course if you're talking wheel horsepower?
One thing to consider with a Twin Screw, or any positive displacement type blower is heat. Even intercooled, you won't be able to sustain top speed power levels for more than a few seconds before ACT's climb and the computer as a result pulls timing and horsepower drops.
In any case....pushing a Mustang to 170+ with 400rwhp on tap seems to be quite doable. Generally though, after about 170mph, the limits of the Mustangs aerodynamic design are tested and its higher drag coefficient is going to require considerably more power to reach higher speeds.
One thing to consider with a Twin Screw, or any positive displacement type blower is heat. Even intercooled, you won't be able to sustain top speed power levels for more than a few seconds before ACT's climb and the computer as a result pulls timing and horsepower drops.
In any case....pushing a Mustang to 170+ with 400rwhp on tap seems to be quite doable. Generally though, after about 170mph, the limits of the Mustangs aerodynamic design are tested and its higher drag coefficient is going to require considerably more power to reach higher speeds.
tag4car
Member
True words Brian. if we wanted to really get this going we should compare the gt500 to the FGT, Power/weight/aero
mustanggt04fast
Member
- Mar 6, 2009
- 105
- 0
- 16
i dont know why guys are scared to go over 100mph all im saying is im not scared to push my car to the limit of what it can do my speedometer goes to 155mph and i have had it pegged out and only at 4500rpms in 5th gear (and yes the speedo was recalibrated) and i keep pushing the car call me crazy or say i have a death wish
but im not scared to drive fast
and i was clocked at 167mph with a radar gun and was at 5700rpms i tak out at 6000rpms. im not arguing with any body but that is what the gun said so that is what ive done in my car 
but im not scared to drive fast and i was clocked at 167mph with a radar gun and was at 5700rpms i tak out at 6000rpms. im not arguing with any body but that is what the gun said so that is what ive done in my car BS. 170 mph with 3.73s? I don't know the math but I don't think that is possible. Even if it is stock mustangs top out around 150. Sorry man. Everyone here owns mustangs, there is no need to lie to us. Didn't the 385hp Cobra R top out around 175 with 100 more hp then a GT and the areo aids.
crazystang25
Member
- Jan 25, 2009
- 492
- 0
- 16
Stan Weiss
Member
Having the RPM and having the HP or 2 different things.
Stan
MPH = 170
Rear = 3.73:1
Tire Diameter = 25.68 (245-45-17)
Trans Gear Ratio (manual 5th ) 0.67:1
RPM=5559
Calculate RPM for given Speed(MPH), Rear Gear Ratio and Trans Gear Ratio
Automotive Performance Software / Interactive JavaScripts Calculators
The texas mile is completely different. It's really cool, but you need 600-700hp to hit 170-175, if not more, in the texas mile in a stang.
tag4car
Member
and i was clocked at 167mph with a radar gun and was at 5700rpms
you should be going 174.32 mph with some math figures, You might need to clean the airfilter up real nice
Stan Weiss' - Automotive Performance Software / Interactive JavaScript to Calculate Speed(MPH) for given RPM, Rear Gear Ratio and Trans Gear Ratio
tire size 25.68
trans gear 0.67:1
i dont know why guys are scared to go over 100mph all im saying is im not scared to push my car to the limit of what it can do my speedometer goes to 155mph and i have had it pegged out and only at 4500rpms in 5th gear (and yes the speedo was recalibrated) and i keep pushing the car call me crazy or say i have a death wish
Again, BS. Unless your car was dropped from a C130, going down a mountain, or fell off a cliff, no one believes you.
i dont know why guys are scared to go over 100mph all im saying is im not scared to push my car to the limit of what it can do my speedometer goes to 155mph and i have had it pegged out and only at 4500rpms in 5th gear (and yes the speedo was recalibrated) and i keep pushing the car call me crazy or say i have a death wish
you would be in jail and your car would be impounded. Newb.
KBExperience
Active Member
crazystang25
Member
- Jan 25, 2009
- 492
- 0
- 16
Stan Weiss
Member
i dont know why guys are scared to go over 100mph all im saying is im not scared to push my car to the limit of what it can do my speedometer goes to 155mph and i have had it pegged out and only at 4500rpms in 5th gear (and yes the speedo was recalibrated) and i keep pushing the car call me crazy or say i have a death wish
Never going to happen. Does not add up.
Stock tires with 3.73:1 4500 RPM = 137-138 MPH
Stock tires with 3.27:1 4500 RPM = 157 MPH
Stock tires with 3.73:1 5460 RPM = 167 MPH
Stan
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