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2020+ Shelby GT500 Mustang
2020 Shelby GT500 Mustang - 10.61@133 MPH - Press Drive Articles/Vids
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<blockquote data-quote="tt335ci03cobra" data-source="post: 16319141" data-attributes="member: 68944"><p>The argument was never if a gt500 is always faster than a viper acr though. All in good spirit as this seems to be, the point is the viper acr doesn’t have as good of a wheel as the gt500 does.</p><p></p><p>Leave everything on the acr the same but put a carbon fiber wheel of the same dimensions on it and weighing something like 15-16lbs. Even if you keep the kumho’s which admittedly do have a very high load rating, or better yet if you get a lighter but equally strong tire on the car, the results would speak for them self. </p><p></p><p>That’s the guarantee [USER=21531]@GTSpartan[/USER]. It’s no stretch or the imagination. You quoted the beginning of that paragraph but read the part where I said keep the dimension. That’s important because the load has to be mitigated. </p><p></p><p>The rear of the acr with that aero weighs dynamically north of 3500lbs +/- at 175mph so the tires would blow if they were not strong enough so a lighter tire may not be feasible.</p><p></p><p>I do know the mkII gt has fixed shocks, and yes a fixed shock is superior on a smooth track.</p><p></p><p>I’ve pointed out before the acr will do best on a track like leguna, and it has to the tune of 1:28 which is race car territory. Sub 1:30 at Leguna is very fast.</p><p></p><p>But look at its times at grattan and vir. My point wasn’t that the acr is some piece of junk. I love the car, and want one. I’m saying great as it is, what holds it back at low speed is the heavy wheel tire package. At high speed it’s not accelerating very fast either. It’s awesome in its element of 60-125mph imo. Maybe it’s 53mph to 147mph but you get the idea. </p><p></p><p>The car needs to be as close to that 1.5g threshold as it can be since it’s trump card is pulling 1.5 g’s. Being manual and stiff as hell, it’s not going to impress on a low speed area because the heavy wheel/tire setup isn’t prone to turn in, the drivetrain will catch and bind depending on clutch inputs from the driver etc.</p><p></p><p>The gt500 cftp isn’t god’s gift to track days as delivered, and I’m not saying it will somehow beat acr’s all the time. My point is the reason the gt500 cftp is doing so well on many different types of venues and circuits is that it is setup with really good rolling stock, smart aero, and low centered weight. Look at its VIR times where it’s gone sub 2:43’s (viper ace went 2:40, Ford gt went 2:38 (and faster unofficially), 755hp zr1 went 2:37. That’s impressive for any car, let alone a 4080lbs mustang with 4 seats.</p><p></p><p>Look at its grattan times in the 1:22 range. That is where the viper has been. Let’s say the viper acr holds the record by .999 seconds, the fact a $90k 4080lbs mustang is lapping that close to a gutted viper with 1700lbs of downforce and 355mm rear tires is insane.</p><p></p><p>Again not shitting on the viper, just drawing the picture of where the gt500 cftp even at 4080lbs is making inroads on competing with a 3400lbs stripped viper on huge tires with 1700lbs or downforce that just happens to hold basically 20+ track records. </p><p></p><p>Hope no one thinks I’m trying to shit on them either, and I do want to go into a tech school to get some great real world time in. Just so busy with work/life</p></blockquote><p></p>
[QUOTE="tt335ci03cobra, post: 16319141, member: 68944"] The argument was never if a gt500 is always faster than a viper acr though. All in good spirit as this seems to be, the point is the viper acr doesn’t have as good of a wheel as the gt500 does. Leave everything on the acr the same but put a carbon fiber wheel of the same dimensions on it and weighing something like 15-16lbs. Even if you keep the kumho’s which admittedly do have a very high load rating, or better yet if you get a lighter but equally strong tire on the car, the results would speak for them self. That’s the guarantee [USER=21531]@GTSpartan[/USER]. It’s no stretch or the imagination. You quoted the beginning of that paragraph but read the part where I said keep the dimension. That’s important because the load has to be mitigated. The rear of the acr with that aero weighs dynamically north of 3500lbs +/- at 175mph so the tires would blow if they were not strong enough so a lighter tire may not be feasible. I do know the mkII gt has fixed shocks, and yes a fixed shock is superior on a smooth track. I’ve pointed out before the acr will do best on a track like leguna, and it has to the tune of 1:28 which is race car territory. Sub 1:30 at Leguna is very fast. But look at its times at grattan and vir. My point wasn’t that the acr is some piece of junk. I love the car, and want one. I’m saying great as it is, what holds it back at low speed is the heavy wheel tire package. At high speed it’s not accelerating very fast either. It’s awesome in its element of 60-125mph imo. Maybe it’s 53mph to 147mph but you get the idea. The car needs to be as close to that 1.5g threshold as it can be since it’s trump card is pulling 1.5 g’s. Being manual and stiff as hell, it’s not going to impress on a low speed area because the heavy wheel/tire setup isn’t prone to turn in, the drivetrain will catch and bind depending on clutch inputs from the driver etc. The gt500 cftp isn’t god’s gift to track days as delivered, and I’m not saying it will somehow beat acr’s all the time. My point is the reason the gt500 cftp is doing so well on many different types of venues and circuits is that it is setup with really good rolling stock, smart aero, and low centered weight. Look at its VIR times where it’s gone sub 2:43’s (viper ace went 2:40, Ford gt went 2:38 (and faster unofficially), 755hp zr1 went 2:37. That’s impressive for any car, let alone a 4080lbs mustang with 4 seats. Look at its grattan times in the 1:22 range. That is where the viper has been. Let’s say the viper acr holds the record by .999 seconds, the fact a $90k 4080lbs mustang is lapping that close to a gutted viper with 1700lbs of downforce and 355mm rear tires is insane. Again not shitting on the viper, just drawing the picture of where the gt500 cftp even at 4080lbs is making inroads on competing with a 3400lbs stripped viper on huge tires with 1700lbs or downforce that just happens to hold basically 20+ track records. Hope no one thinks I’m trying to shit on them either, and I do want to go into a tech school to get some great real world time in. Just so busy with work/life [/QUOTE]
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2020 Shelby GT500 Mustang - 10.61@133 MPH - Press Drive Articles/Vids
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