BMW M4 Car and Driver Lightning Lap times are out

[M4LF]

What an accomplish GM has done with the C7. All this with the comfort of seat ventilation!!

But for the person who can only have one car, the M4 is a great achievement. A couple seconds doesn't mean much anyways. At least until the turbos start blowing, the oil starts leaking, and the exhausts start vibrating. Lets cross our fingers

[M3 Esq]

Originally Posted by CirrusSR22

The engine is from the C6 Z06. 7.0 liter dry sump V8.
The brakes are carbon ceramics shared with the new C7 Z06.
Multimatic spool valve shocks
Bunch of extra cooling
Unique aero
Thinner rear glass, less sound insulation, simplified wiring harnesses.

A/C and a radio are optional, not excluded completely.

Yea this thing looks sick. The marketing materials say it's 300lbs lighter than the ZL1. This is a purpose built track car that should only loosley be compared to the M4. It seems like the Z28 is to camaro what the GTS was to the E92 (except no cage and harnesses) and with a LOT more power.

[gthal]

Originally Posted by turbo8765

Personally I think it's GM marketing. These PSSs are "special".

Durometer readings for both tires are essentially the same.

Maybe but GM is pretty clear the PSS on the Z51 and non-Z51 are different compounds. Here is the description of the PSS used in the Z51 from Tirerack...

Because the Z51 Performance Package takes the Corvette Stingray to a more aggressive level of performance, Michelin has developed vehicle/size specific Pilot Super Sport ZP tires to permit fine-tuning features to match their vehicle application.

Both versions employ an asymmetric tread design that features a low-void outboard shoulder for cornering while their notched center ribs and inboard shoulder promote high-speed performance in dry conditions. Wide circumferential grooves and lateral notches help channel water through the footprint to maintain wet traction. Sizes for the standard Corvette Stingray use a single tread rubber compound that blends dry traction, wet traction and tread life; while the sizes for Z51 equipped cars feature side-by-side tread compounds that deliver near-racing-slick dry grip and handling levels, without abandoning tread life and wet handling.

Doesn't seem like marketing BS to me The PSS on the Z51 Stingray is a more aggressive compound than regular PSS like you find on the M4.

[M3 Esq]

Originally Posted by gthal

Maybe but GM is pretty clear the PSS on the Z51 and non-Z51 are different compounds. Here is the description of the PSS used in the Z51 from Tirerack...



Doesn't seem like marketing BS to me The PSS on the Z51 Stingray is a more aggressive compound than regular PSS like you find on the M4.

BMW worked with Michelin on a specially designed PSS for the M4 as well.

"Michelin played with the architecture and the compound of the Pilot Super Sport tires to fit the M car's needs. That's typical among manufactures. What isn't so typical is that the M3 wears different front and rear tires—both tread pattern and contact-patch shape are different. When viewed in section, the front tire meets the road as an oval, which allows for more progressive tire slip while turning. The rear tires create a rectangular contact patch, allowing better bite into the road. "


http://www.roadandtrack.com/car-revi...sons-bmw-m3-m4

[Damasconian]

Originally Posted by IEDEI

that Z/28 is amaaaaazing value for money----in terms of getting something so quick.

Yes, but the value is 100% in its drivetrain and mechanics. The interior is still one of the worst on the market.

I know this is a "track car", but for 75K (or more with dealer markup) give me something better than the hardest plastic known to man. I sat in a ZL1 at the Indy 500 two years ago and hurt my elbow when I rested it on the hard-as-stone armrest.

For the track - Heck yes
For a DD - Oh no

[Black Gold]

Originally Posted by M3 Esq

BMW worked with Michelin on a specially designed PSS for the M4 as well.

"Michelin played with the architecture and the compound of the Pilot Super Sport tires to fit the M car's needs. That's typical among manufactures. What isn't so typical is that the M3 wears different front and rear tires—both tread pattern and contact-patch shape are different. When viewed in section, the front tire meets the road as an oval, which allows for more progressive tire slip while turning. The rear tires create a rectangular contact patch, allowing better bite into the road. "


http://www.roadandtrack.com/car-revi...sons-bmw-m3-m4

There is a difference between changing the shape of the contact patch and changing the material and compound of the tire. A big difference.

Tires make a differnce here, but the c7 is definitely the faster track car.

[M3 Esq]

Originally Posted by KennyPowers

There is a difference between changing the shape of the contact patch and changing the material and compound of the tire. A big difference.

Tires make a differnce here, but the c7 is definitely the faster track car.

Not sure I'm following. The first sentence says they played with the compound. Grip is a combination of compound and contact patch.

Michelin played with the architecture and the compound of the Pilot Super Sport tires to fit the M car's needs

[///MCFC]

really wish they'd included a P1 in this test.

[m3less]

They should of had the 991 GT3

[onatuesday]

Originally Posted by ///MCFC

really wish they'd included a P1 in this test.

Pretty sure if a car wasn't in the test it's because the manufacturer refused to provide it. So mad respect to Porsche for having the kahunas to put up the 918. We already know McLaren is too scared to post the Nurburgring time of the P1 likely cuz it's not faster than the 918

[///MCFC]

Originally Posted by trinim3

Pretty sure if a car wasn't in the test it's because the manufacturer refused to provide it. So mad respect to Porsche for having the kahunas to put up the 918. We already know McLaren is too scared to post the Nurburgring time of the P1 likely cuz it's not faster than the 918

probably right. mclaren have an unfortunate tendency to make promises they can't keep.

[gthal]

Originally Posted by M3 Esq

Not sure I'm following. The first sentence says they played with the compound. Grip is a combination of compound and contact patch.

Michelin played with the architecture and the compound of the Pilot Super Sport tires to fit the M car's needs

Understood... so do we know what they did to the compound? Is it like an R compound similar to what is on the C7? At this point, there is no F8X specific tire on Tire Rack... just the normal PSS. Maybe it isn't available yet? The Z51 PSS was available for the Corvette within weeks of the car's launch. It surprises me that there isn't a specific OEM M3/4 tire shown there yet for the car if one was coming.

All I'm saying is we KNOW the PSS on the C7 Z51 is much more aggressive compound than the regular PSS. For the M3/4, we don't know what was changed, if it was significant, or what it does to the performance of the tire.

[M3OW]

Michelin in General is the most over rated over priced tire manufacturer out there.

[Eau Rouge]

Originally Posted by turbo8765

How original. There's always a bottom feeder. Troll.

Your humor detector has failed. Schedule service ASAP. GL

[swanson]

Originally Posted by M3OW

Michelin in General is the most over rated over priced tire manufacturer out there.

Overrated? no. Overpriced? yes.

[MaynardZed]

Originally Posted by trinim3

Yeah that guy is in serious denial lol. Either that or he's lapping with the novice HPDE class where admittedly yes bmws can keep up with vettes

Yes bmw can only keep up with vettes in novice class.

[M3 Esq]

Originally Posted by gthal

Understood... so do we know what they did to the compound? Is it like an R compound similar to what is on the C7? At this point, there is no F8X specific tire on Tire Rack... just the normal PSS. Maybe it isn't available yet? The Z51 PSS was available for the Corvette within weeks of the car's launch. It surprises me that there isn't a specific OEM M3/4 tire shown there yet for the car if one was coming.

All I'm saying is we KNOW the PSS on the C7 Z51 is much more aggressive compound than the regular PSS. For the M3/4, we don't know what was changed, if it was significant, or what it does to the performance of the tire.

I doubt it's anything like an R comp. It's probably just a little stickier than a reg PSS and it looks like the tread pattern is different b/t F and R if the R&T article is accurate.

BMW can't put anything too aggressive on there because people will complain that the tire wore out after 6k of launching and drag racing.

[Divexxtreme]

Originally Posted by M3 Esq

I doubt it's anything like an R comp. It's probably just a little stickier than a reg PSS and it looks like the tread pattern is different b/t F and R if the R&T article is accurate.

Agreed. Probably similar in stickiness to the MPSS ZP that came on my C7. A little stickier than regular MPSS (which I had on my last GT-R), but not close to actual R-compound stickiness (like the R888s I currently have in my garage).

[DieGrüneHölle]

Originally Posted by M3 Esq

Not sure I'm following. The first sentence says they played with the compound. Grip is a combination of compound and contact patch.

Michelin played with the architecture and the compound of the Pilot Super Sport tires to fit the M car's needs

Reading comprehension is hard for some.

So...Super Sports on the M3/M4 got even more work than just compound change like the C7.

[FogCityM3]

LOL on people thinking there is a huge difference in PSS compound in one car vs another and a marked difference in determining relative performance...all have similar dry grip, wet grip, stopping characteristics but may be more optimized for the specs of a car...it's represented as one tire type on the website. Anyone thinking that the Vette's are more like R-comps than other PSS's is delusional. Doesn't even make logical sense.

[Topspeed]

Originally Posted by m3less

They should of had the 991 GT3

Not worth risking the drivers life.

[FogCityM3]

Very quick considering they were PSS tires.

Though had to raise an eyebrow when I saw this:

http://www.caranddriver.com/reviews/...-update-review

makes the S65 look reliable!

Originally Posted by Blipit_

Stingray was very quick.

Nearly 4 seconds quicker than a R8 V10 plus. Impressive to say the least.