Top Speed

[N8dawg]

Various sources are showing a top speed of 155 for the gt500 but Garage 419 is saying it is 175. Anyone know the official top speed for the 2010 shelby?

[cbr1000]

I don't know exactly although I believe it's electronically limited to 155mph and after that it's probably pure speculation. Since it's a different engine trans set up ... change in rear end gearing and tune from prior years who knows... I'm gonna guess 170 ish

[09KR0058]

This brings up an interesting point that I've been curious about. My KR supplement manual says that its "electronically limited to 155MPH". I had a chance to really punch it a few days ago on a long straightaway on I-575, and hit 130 in no time. I was still quite away from the red-line on the tach. So, if I had kept going, and not hit the red-line, would something in the electronic controls keep me from exceeding 155?

 

Inquiring minds want to know!!!

[ISAID]

I seen on one of the articles on the design changes for the 2010 sgt that had been made that shutdown speed was 163mph.

[SicShelby]

This brings up an interesting point that I've been curious about. My KR supplement manual says that its "electronically limited to 155MPH". I had a chance to really punch it a few days ago on a long straightaway on I-575, and hit 130 in no time. I was still quite away from the red-line on the tach. So, if I had kept going, and not hit the red-line, would something in the electronic controls keep me from exceeding 155?

 

Inquiring minds want to know!!!

 

If the tune on the KR limits your speed... it would be like the engine just kind of hits a wall... Governor

[Torched10]

If the tune on the KR limits your speed... it would be like the engine just kind of hits a wall... Governor

 

GM/Ford put that limiter in several years ago because thats the speed rating limit for most tires--when you hit it,its like a rev limiter.For some reason the vettes dont have it, maybe its because the tires are run flats and cost $500 each--but i hit 170 at Road Atlanta in the long starighaway off turn 8 .At high speed the aero of the car begins to limit speed as well.But only do it on a track, and with a helmit on.

[darthracer777]

So, the ECM needs to be re-calibrated to remove the 'governor'?

[Torched10]

So, the ECM needs to be re-calibrated to remove the 'governor'?

 

And make sure you have the right tires,W.X.Y or ZR rated--dont know what my new GT500 cames with

[COBRA32]

I would think with the speed limiter removed it would do over 190 mph since a guy in germany took a stock GT500 with tune on the Autobonn did 196. With the 2010 having better aerodynamics it may do a little more.

[ISAID]

And make sure you have the right tires,W.X.Y or ZR rated--dont know what my new GT500 cames with

 

The 2010 Shelby comes with P255/40ZR19 IN THE FRONT AND P285/35ZRI9 ON REAR.

[Canadian Bear]

Just my .02 here but I would think after a tune from FRP or any of the other companies that we should be able to change the limiter. If the Challenger can do 175mph then I think unlimited our cars are easily capable of that. I know with my 09 I can hit 120-125mph just before the rev limiter in 3rd and she is still stock. So I dunno?

[Torched10]

The 2010 Shelby comes with P255/40ZR19 IN THE FRONT AND P285/35ZRI9 ON REAR.

ZR are great tires--have them on 2 cars--they are rated at 149+, depending on car maker design etc. I have a car on the track at way past that,with 12 turns,and it was fine--no rev limiter in the stock car.Are the new tires run flats,ie no spare??

[samg]

Various sources are showing a top speed of 155 for the gt500 but Garage 419 is saying it is 175. Anyone know the official top speed for the 2010 shelby?

 

 

Given the car's power, drag coefficient, and other characteristics it should do around 185 MPH with proper gearing. That is, the rear end gear is changed so that you are at about readline (max HP) in fifth gear at 185 MPH.

[kronus01]

If I remember correctly I remember seeing that in fourth you will redline at 145mph, which is a joke considering the 155pmh limit. I remember hearing that 180 is possible on a stock car. Now with the changes in gearing to the 2010 who knows

[07-2937]

They are limited @ 155 ish they can go alot faster but the SCT/FRPP tuners used do not remove or raise the high speed governor. It can be done but that would require the owner to get it done. I think its a litigious matter for businesses...

[cbr1000]

Given the car's power, drag coefficient, and other characteristics it should do around 185 MPH with proper gearing. That is, the rear end gear is changed so that you are at about readline (max HP) in fifth gear at 185 MPH.

 

You probably meant 6th gear.

[mustang crazy]

You probably meant 6th gear.

I have a 08 hit 170ish and 5th gear 5400 rpm but speed limiter hit first. I understand that I have stock 3.31 gears in rear in.2010 are 3.55 and diffrent ratio in trans. was a awesome ride!!!! :happy feet:

[samg]

You probably meant 6th gear.

 

 

Nope, meant fifth gear. Totally stock from the factory a 2010 GT500 is geared in 5th for a top speed of about 192 MPH but does not have the power to get there -- would need about 595 HP at the flywheel.

 

If you changed out the rear end to a 3.73 you would top out at around 185 MPH in 5th gear with 540 HP at the flywheel.

 

Sixth gear is too high to do anything with re top speed -- the resulting engine RPMs are too low = not near max HP.

[John Strauss]

From my experiences I have found that a upgraded 07 GT 500 with tune CAI and pulley will only achieve 173mph. in the Texas Mile. Try as I may in a 2 mile run it would still only get to 173mph. Once up graded to a SS 725 hp the Texas Mile run would only do 162mph, Shelby limited. Changing rear tires from 27 to 29 inches tall it went 175mph. Lifting the Speed limiter with the taller tires good fuel and a 2 7/8 pulley it ran 186mph in the mile. I have seen all the posts about this car going 190 plus in stock form, just can't see that happening. The box stock 07 08 GT 500 should do low to mid 160s in the mile. If your not that good of a driver you might get a couple more miles per hour in 2 or 3 miles flat out but not much more. I posted the speed form I use. Oh and the rev limiter and speed act total different, the rev cuts out every other cyl. fire where as the speed just pulls back on fuel. You will know when you hit the rev limit but its hard to tell when your standing on the speed limiter. Hope this help. My guess for the new 2010 is mid to high 160s with the limiter off a stock 2010.

 

John

 

 

By: Sumner Patterson

Version 09-27-06

- 6 Speed -

(Change) RPM & MPH in RPM & MPH in RPM & MPH in

(These) 4th 5th 6th

Rear End Ratio=> 3.31

Tire Height===> 27 RPM MPH RPM MPH RPM MPH

6000 145.60 6000 182.00 6000 231.12

First Gear====> 2.97 6500 157.74 6500 197.17 6500 250.38

Second Gear====> 1.78 7000 169.87 7000 212.34 7000 269.64

Third Gear====> 1.30 7500 182.00 7500 227.51 7500 288.90

Fourth Gear====> 1.00 8000 194.14 8000 242.67 8000 308.16

Fifth Gear====> 0.80 7500 182.00 7500 227.51 7500 288.90

Sixth Gear====> 0.63

 

RPM in RPM RPM in RPM RPM in RPM RPM in RPM RPM in RPM RPM in

MPH First Drop Second Drop Third Drop Fourth Drop Fifth Drop Sixth

 

30 3673 1472 2202 594 1608 371 1237 247 989 210 779

35 4286 1717 2569 693 1876 433 1443 289 1154 245 909

40 4898 1962 2935 792 2144 495 1649 330 1319 280 1039

45 5510 2208 3302 891 2412 557 1855 371 1484 315 1169

50 6122 2453 3669 989 2680 618 2061 412 1649 350 1299

55 6735 2698 4036 1088 2948 680 2268 454 1814 385 1429

60 7347 2944 4403 1187 3216 742 2474 495 1979 421 1558

65 7959 3189 4770 1286 3484 804 2680 536 2144 456 1688

70 8571 3434 5137 1385 3752 866 2886 577 2309 491 1818

75 9184 3680 5504 1484 4020 928 3092 618 2474 526 1948

80 9796 3925 5871 1583 4288 989 3298 660 2639 561 2078

85 10408 4170 6238 1682 4556 1051 3504 701 2804 596 2208

90 11020 4416 6605 1781 4824 1113 3711 742 2968 631 2338

95 11633 4661 6972 1880 5092 1175 3917 783 3133 666 2468

100 12245 4906 7339 1979 5360 1237 4123 825 3298 701 2597

105 12857 5152 7706 2078 5628 1299 4329 866 3463 736 2727

110 13469 5397 8073 2177 5896 1361 4535 907 3628 771 2857

115 14082 5642 8439 2276 6164 1422 4741 948 3793 806 2987

120 14694 5887 8806 2375 6432 1484 4947 989 3958 841 3117

125 15306 6133 9173 2474 6700 1546 5154 1031 4123 876 3247

130 15918 6378 9540 2573 6968 1608 5360 1072 4288 911 3377

135 16531 6623 9907 2672 7236 1670 5566 1113 4453 946 3506

140 17143 6869 10274 2771 7504 1732 5772 1154 4618 981 3636

145 17755 7114 10641 2870 7772 1793 5978 1196 4783 1016 3766

150 18367 7359 11008 2968 8040 1855 6184 1237 4947 1051 3896

155 18980 7605 11375 3067 8308 1917 6390 1278 5112 1086 4026

160 19592 7850 11742 3166 8576 1979 6597 1319 5277 1121 4156

165 20204 8095 12109 3265 8844 2041 6803 1361 5442 1156 4286

170 12476 3364 9112 2103 7009 1402 5607 1192 4416

173 12696 3424 9272 2140 7133 1427 5706 1213 4494

175 12843 3463 9380 2165 7215 1443 5772 1227 4545

180 13210 3562 9647 2226 7421 1484 5937 1262 4675

185 13577 3661 9915 2288 7627 1525 6102 1297 4805

190 13944 3760 10183 2350 7833 1567 6267 1332 4935

195 14310 3859 10451 2412 8040 1608 6432 1367 5065

200 14677 3958 10719 2474 8246 1649 6597 1402 5195

205 15044 4057 10987 2536 8452 1690 6761 1437 5325

210 15411 4156 11255 2597 8658 1732 6926 1472 5455

215 15778 4255 11523 2659 8864 1773 7091 1507 5584

220 16145 4354 11791 2721 9070 1814 7256 1542 5714

225 16512 4453 12059 2783 9276 1855 7421 1577 5844

230 16879 4552 12327 2845 9483 1897 7586 1612 5974

235 12595 2907 9689 1938 7751 1647 6104

240 12863 2968 9895 1979 7916 1682 6234

245 13131 3030 10101 2020 8081 1717 6364

250 13399 3092 10307 2061 8246 1752 6494

255 13667 3154 10513 2103 8411 1787 6623

[samg]

From my experiences I have found that a upgraded 07 GT 500 with tune CAI and pulley will only achieve 173mph. in the Texas Mile. Try as I may in a 2 mile run it would still only get to 173mph. Once up graded to a SS 725 hp the Texas Mile run would only do 162mph, Shelby limited. Changing rear tires from 27 to 29 inches tall it went 175mph. Lifting the Speed limiter with the taller tires good fuel and a 2 7/8 pulley it ran 186mph in the mile. I have seen all the posts about this car going 190 plus in stock form, just can't see that happening. The box stock 07 08 GT 500 should do low to mid 160s in the mile. If your not that good of a driver you might get a couple more miles per hour in 2 or 3 miles flat out but not much more. I posted the speed form I use. Oh and the rev limiter and speed act total different, the rev cuts out every other cyl. fire where as the speed just pulls back on fuel. You will know when you hit the rev limit but its hard to tell when your standing on the speed limiter. Hope this help. My guess for the new 2010 is mid to high 160s with the limiter off a stock 2010.

 

John

 

Attaining top speed in a mile is different than absolute top speed as you know. Acceleration will generally limit the speed attained in one mile. Would agree with you re somewhere around 170 MPH absolute top speed for the 2010 GT500 but only because the stock gearing is not matched to the ultimate speed potential that the 540 HP and car configuration should produce. With a rear end gear change to 3.73 there is an ideal overall HP and gear ratio match in 5th gear at around 185 MPH. Would also probably want to have "Y" rated tires for such a run.

[sportscars]

I hit the speed limiter (5th gear) at 160 in my brothers vert last year in west texas (terlingua). You can tell the car is cutting power. Took well over two miles to get there though.

 

I think he has it on video he took from the pass seat. I'll check. It was a wild ride to say the least.