[QUOTE=johnglenntwo;1590363058]2700lb is it!? Wow!:yesnod:[/QUOTE

Looking again that has to be dry. The 650s is 3200 as tested and the new 675LT is about 250lbs less so still a but under 3000lbs is very impressive.

Yep!
 

You got me there!:crazy:

605hp, 398TQ, 3075lb, MPSC2: 245/35ZR20, 305/30ZR20

666hp, 516TQ, 3050lb, PST: 235/35ZR19, 305/30ZR20

Anyway, these guys look like brothers that have thus far been unable to decisively assert their dominance over the new Z07 on a road track! And I think we can see the TT allure here in the number variances. They weren't close enough anymore. And will these special editions be able to do the deed?:D
And again, hopefully AWD isn't necessary, but, we don't know, and they may exclude those details, since, they are sold out already!:(

Cool vid and Mclaren is a beast but that 911 turbo was a 996 turbo. Over 2 models old and over a decade old technology. A new Turbo S will absolutely beat the mclaren off the line and at least to 60mph. Nothing will out launch a 991 turbo S PDK not even the GTR. Then power to weight takes over and the 911 will be looking at taillights.

actually it was a 2010 997 and i agree the 991 TTS is
significantly faster ! the new 991.2 with rumored 4.0 litre
will be even faster !

Are you sure?? That def looks like a 996 front not 997 to me but i could be wrong.

One magazine test without a professional driver on one particular track is pretty meaningless. Especially a 3 second difference looking at the pecking order at that track. Bet you think its as quick as a 918 at all tracks, too, huh?

What about the GT350R? It will beat the Z28. More power, less weight.

What you missed was my reply regarding widths and compounds but I guess that (mildy) technical information went over your head?

Tell you what, swap the tires and give your guesses on lap times anyway?

It will beat the Z/28, or at least be very close, but not because more power less weight - look at the GT500, more power, a lot more, and less / similar weight, got its ass handed to it. The 350R will be a track monster because of its chassis and suspension tuning.

I highly doubt 20mm of tire difference makes that much difference. If it did, and results in no other compromises, why didn't the McLaren engineers slap on the widest tires they found? Even an engineering student can take on a design spec that simple...

Truth is, a lot more goes into tire selection than just "go-wide". Sometimes, a narrow tire can be beneficial - case in point, why did the ACR go with 20mm NARROWER tires (335 vs 355)?

A wild guess here on my part: perhaps due to the rear powertrain, the McLaren is limited to shorter control arms.


https://cimg9.ibsrv.net/gimg/www.cor...ac1629756b.jpg

This causes relative larger camber change as it cycles through its travel. The chassis engineers may have determined anything over 305 to be non-beneficial, as you lose too much contact patch. So why use a heavier tire / wheel if you don't gain from it?

Contrast this to the relatively long control arms of the C7 chassis:


https://cimg4.ibsrv.net/gimg/www.cor...e506f00dc7.jpg

Agreed though iirc the GT500 weighed more, worse weight distribution and SRA. We're on the same page except what other reasons will it beat the Z/28 assuming track tuned suspension and aggressive tires?

Certainly possible. Overall width and footprint are all considerations from packaging, markets sold into, driveability, styling, etc.

The ACR may obtain quicker turn-in and better aero while the downforce benefits offset the smaller size. But then again would 20mm make that much of a difference? :)

So whats your issue Deuuuce? So you admit you have no problem with the fact that the 650S weighs so much less than the Z but want to moan and groan over tire size? Lame! Like I said... moving goal posts to suit your sort of useless argument:thumbs:

The Z28 has 40trq more vs the GT350 that has 20hp more. Seems power is a calculation then those numbers well cancel each other out. But if you think measly 20hp is the end all then I wouldn't be surprised by that:crazy::lol:

So maybe that 150lbs (maybe) might be good for slight advantage. Isnt it funny how NOW you want to talk about 150lb lighter weight being such and advantage but wont even mention that with your 650S vs Z06 argument:hide::lol:

The 1LE beat the track pack GT500 at most tracks tested with 250hp less and using the same tires, so you never know:thumbs:

Anyways... I bet the Z28 has a very good chance keeping its head up with the GT350 any way you slice it. Then again its an old chassis now, and the next gen is coming. But I dont see total domination, maybe a little... maybe none.

And you think imagine what is as quick as 918? Because why?

Nope, big sticky tires are an equalizer for a heavier and slower car.

20hp and less weight. If you want to compare torque figures, don't look at the 458 and how well it performs....

Now its the 1LE, okay, totally different purpose than the GT500 but whatever suits you.

You think the C7Z is as quick as a 918.

Anyway 3 seconds quicker than a mid-engine, lighter car with the same horsepower is somewhat laughable maybe even an anomaly. Did you read the article?

Best Drivers Mazda! Be there!

Z06 posted a 2:44.6 at VIR, 1.5 seconds slower than the 918 and .8 seconds quicker than the 650S.

The 650S and C7Z had some serious speed differentials apparently. Fascinating and very impressive.