Wait... The S2000 and MX-5 aren't convertibles?
Really?
I stand corrected on the Miata, but I have yet to see a S2000 retracting a top in any way.
Well, you might want to pen your thoughts and mail them to Max5, Spec Miata and the Tuscan Challenge, amongst others.
Notice how most of your argument revolves around the 1 car that manages to be the exception to racing convertibles, i.e., the Miata.
As I said, convertibles are
generally not the first choice. If they were, we'd be seeing a lot more M3 Conv's., 911 Turbo Conv's., F430 Spyders, Corvette Conv's., Viper Conv's., etc. etc. over the Coupes at track days. But, from every event & all the pictures I've seen, we don't. It's always the coupes, and rarely any convertibles.
I'm not saying you can't race them, but there is a reason why you don't see people running out and buying 335i convertibles or 911 convertibles expecting them to make good track cars over the coupes. They're just not engineered or built to do so well compared to the coupes.
The Miata and very, very few others are the only exceptions, and the wiki entry I quoted usually represents as to why the majority of convertibles aren't tracked.
Indeed.
Mazda MX-5 Mk3 (NC) 2.0i Sport: Weight - 1,095kg/2,414lb; 0-60mph - 7.6s; Top speed - 131mph
Mazda MX-5 Mk3 (NC) 2.0i Sport Roadster Coupe: Weight - 1,132kg/2,495lb (+3.3%) ; 0-60mph - 7.9s (+3.9%); Top speed - 134mph (+2.2%)
And that's with a giant sheet of metal and a power folding mechanism instead of a manual cloth roof.
Doesn't seem all that "greatly effected" (sic) to me.
Again, you're talking about the Miata, the one of few cars that can overcome it, probably because it was engineered as a Roadster trim first, and as a Coupe second. I don't know.
Aaaaanyway, point is that taking the roof off a car doesn't automagically make it soft - or softer than a coupe version of it. And if it does make any difference, sure as hell you or I aren't going to have the ability to notice where the difference actually is.
I never said it did.
Again, and for the last time, they just aren't generally the first choice.
As for telling the difference, um, yes, you very well be able to see the difference in the lap times. Excluding the Miata, Convertibles are typically not chosen over Coupes for track cars b/c they are not engineered to perform as well. Sometimes they match their Coupe counterparts, but generally, no they don't, and it's a reason why people don't buy M3 or 911 Convertibles over the Coupes.
Corvette C6 Coupe: 1:44.2
Corvette C6 Conv.: 1:46.4
@Autozeitung.
BMW M3 Coupe: 1:40.1
BMW M3 Conv.: 1:41.9
@Autozeitung.
F430 Coupe @ Vairano: 1:17.373
F430 Spyder @ Vairano: 1:18.460
F430 Coupe @ Zolder: 1:45.25
F430 Spyder @ Zolder: 1:46.34
*However, Ferrari claims both versions can lap 1:27.00 exact on Fiorano.
350Z Coupe: 1:24.397
350Z Conv. : 1:25.612
@Vairano.
911 Carrera S: 1:14.3
911 CS Conv.: 1:16.8
@Hock. Short.
These are just examples, and do not include the fact that the coupes are also typically quicker in acceleration. Again, there sometimes are exceptions where the Conv. can match the Coupe, but it's not often, and usually, not even very close.
If someone wants to run a conv. though, good for them. However, they don't need to be confused when they see their lap times aren't near the coupes.