We re going to nurburgring

**Scott_in_fl** · 09-21-2017

The Vette should be very close to the GT2RS times. Similar horsepower, probably less weight, fast shifting auto trans, etc.

Also, the Vette racing program has been solid lately and likely spun off a ton of good R&D that GM has by now had plenty of time to digest (i.e. how to resolve the cooling issues on the Z06).

I think both cars are going to be terrific and it will be fun to see which is fastest.

**TrackAire** · 09-21-2017

Originally Posted by dewilmoth

What tires are you referring to? Curious if they'll make a size we can use on the ACR.

These are what I'm pretty sure are on the new Camaro ZL1 1LE. What impressed me was these tires got down to 7:13 unofficial Ring time in car at least 450 to 500 lbs heavier than the ACR-E.
https://www.tirerack.com/tires/tires...F1S3&tab=Sizes

I don' know if they make any other sizes than what is listed yet, but I bet the new Vette ZR1 will have a larger rear tire if they stay with Goodyear. But knowing GM, they may go with the Michelins on the Vette because they consider it a premium car so it needs a more premium name brand tire????.....who knows.

**dewilmoth** · 09-21-2017

Originally Posted by TrackAire

These are what I'm pretty sure are on the new Camaro ZL1 1LE. What impressed me was these tires got down to 7:13 unofficial Ring time in car at least 450 to 500 lbs heavier than the ACR-E.
https://www.tirerack.com/tires/tires...F1S3&tab=Sizes

I don' know if they make any other sizes than what is listed yet, but I bet the new Vette ZR1 will have a larger rear tire if they stay with Goodyear. But knowing GM, they may go with the Michelins on the Vette because they consider it a premium car so it needs a more premium name brand tire????.....who knows.

Those do seem to do well on the heavier ZL1. Too bad they don't currently offer them in anything but 20".

**Scott_in_fl** · 09-21-2017

It's nice to see Goodyear finally joining the party again!

**ACR** · 09-21-2017

Saddened we are already beaten by Porsche.

**Stealth78** · 09-22-2017

In regards to tire options, has anyone tried the R888R on the ACR? I didn't even realize they made the size needed for the ACR until the national event held up here in New England this past week. There was an ACR that was running those Toyo's on the front but in a size of 295/30/19. Being that they are a 30 and not a 25 you could definitely see the size difference in the sidewall height. If not a great track tire I could see this being a great option for the streets offering a bit more sidewall for rim protection and to be honest they fill the wheel well perfectly so appearance is an added bonus.

**Snakebit10** · 09-22-2017

It was inevitable. Even if we got a sub 7 min it was still a shoestring attempt vs a mega dollar budget to get the best possible time for the Porsche. Whatever record the Viper got was bound to be broken by the GT2 RS. Cant compete with that type of effort. We have to settle for the fastest RWD, manual driven car at the Ring. Not bad but not what we all wanted.

**Elganja** · 09-22-2017

https://www.autoevolution.com/news/2...rd-120538.html

pretty amazing if true.... 6:48.75 is a blistering pace

**Scott_in_fl** · 09-22-2017

Wow, and the GT2RS does not seem to have that much downforce. It must be doing it solely with power/weight and tire. Incredible.

I can hear the air deflating out of GT3RS prices right about now.

**ACR** · 09-22-2017

They are running MPCup2s?

**dewilmoth** · 09-22-2017

Originally Posted by Stealth78

In regards to tire options, has anyone tried the R888R on the ACR? I didn't even realize they made the size needed for the ACR until the national event held up here in New England this past week. There was an ACR that was running those Toyo's on the front but in a size of 295/30/19. Being that they are a 30 and not a 25 you could definitely see the size difference in the sidewall height. If not a great track tire I could see this being a great option for the streets offering a bit more sidewall for rim protection and to be honest they fill the wheel well perfectly so appearance is an added bonus.

I'm about to order them in 295/30-19 for my ACR, and I'll report back once they are installed in the next couple weeks. I corded the inside edge of the Kumhos at 4,800 street miles.

**Snakebit10** · 09-27-2017

Looks like the final time for the GT2 RS was 6:47 at the Ring. Ridiculous.

**ACR** · 09-27-2017

What tire did they run?

How on earth did they shave 9 seconds from the previous practice runs?

It seems they did all their testing in a short period of time, why was the Viper effort spread over weeks and only three runs were made?

**13COBRA** · 09-27-2017

Originally Posted by ACR

What tire did they run?

How on earth did they shave 9 seconds from the previous practice runs?

It seems they did all their testing in a short period of time, why was the Viper effort spread over weeks and only three runs were made?

Where have you been?

9 seconds off what runs? The first number I heard it ran was right around a 6:50.

Porsche probably rented the track for a few days in a row and knocked out all their runs.

The Viper run was over a few weeks because they were trying to get time slots with minimal funds.

**ViperDC** · 09-27-2017

RIP to any prayer the Viper has of ever taking this lol

Porsche just threw down the gauntlet

**Snakebit10** · 09-27-2017

You cant equate a factory effort with a privateer effort on the Ring. From what I read they used tire warmers, different tires every lap etc, not mention multiple hours in a row with two Porsche racers like Nick Tandy for example. You just cant equate the Viper effort with Porsche's effort. David vs Goliath and in this case David came up short due to nothing other than money and time.

I can't help but feel its a tire thing too but I'm no tire genius. But lets be real outside of the Vipers effort we all take these Ring efforts on faith as none of the other mfg are as transparent as the Vipers run so who knows for real.

**ViperDC** · 09-27-2017

Originally Posted by Snakebit10

You cant equate a factory effort with a privateer effort on the Ring. From what I read they used tire warmers, different tires every lap etc, not mention multiple hours in a row with two Porsche racers like Nick Tandy for example. You just cant equate the Viper effort with Porsche's effort. David vs Goliath and in this case David came up short due to nothing other than money and time.

I can't help but feel its a tire thing too but I'm no tire genius. But lets be real outside of the Vipers effort we all take these Ring efforts on faith as none of the other mfg are as transparent as the Vipers run so who knows for real.

the times were ran on Sport Cup 2s, nothing special. the ACR has nothing for this car but let the excuses roll in

The Viper costs about half of what this thing will so it's amazing in it's own right but there is always a bigger fish. Wait until the Merc Project One or that new Aston Martin built in collaboration with Red Bull run it. This time will be destroyed.

**Snakebit10** · 09-27-2017

Well I was not making excuses just stating that you just cannot compete with a juggernaut like Porsche effort on the Ring with a crowd funded effort. That effort was GREATLY appreciated but no way you gonna beat that factory effort. Do you think that GT2 RS would have run a 6:47 with a crowd funded effort?

Taken from Rlist:

" correct Mike!

but one thing to mention: based on the vids from Boris and infos from Dale - the multible lap attempts where clearly not on the same tires. not that somebody thinks 5 laps in a row or so. i guess even the cars where forced to cool down a bit during the attempts.

it was a warm up + hot lap per set.
pits + change wheels (pre heated).
and again."

**TwinVipers** · 09-27-2017

why preheat the tires if you are doing a warm up lap anyways?

**13COBRA** · 09-27-2017

Regardless of a factory run or a crowdfunded run...the ACR-E was not going to run with this thing.

The GT2 RS has more power. Top speed of 212mph dwarfs the ACR-E top speed. Hell, it hit 193mph-ish on the back straight where the Viper was hitting considerably less.

Job well done Porsche.

**Snakebit10** · 09-27-2017

Totally agree. It will be interesting to see a lap speed break down and see how much it beat the ACR in the turns. It has way less downforce than the ACR yet it had to beat it in some of the turns to be that much faster. Incredible feat.

**13COBRA** · 09-27-2017

Originally Posted by Snakebit10

Totally agree. It will be interesting to see a lap speed break down and see how much it beat the ACR in the turns. It has way less downforce than the ACR yet it had to beat it in some of the turns to be that much faster. Incredible feat.

I would be interested to see that as well. I bet it didn't beat it around too many of the corners. Just accelerating out of the corners gives the advantage to Porsche though. I mean, 20mph on the back is HUGE.

**Russ Oasis** · 09-27-2017

With no excuses made, what Snakebit10 said is correct. Porsche lives next door to the ring. When they want to make a Nurburgring statement (and they did a good job), they bring their factory drivers and factory engineers to The Ring for several days. Our effort was looking for 30 minute segments here and there, to try to make a run. (in a 30 minute segment, you have enough time for a warm up lap and a flyer). I'm not saying we could have made the Viper beat Porsche's new time, but when you are begging for nickels and dimes to afford the run, vs the FACTORY paying for everything, it's a different effort. The 911 GT2RS run is extremely impressive. So was the Viper's. As Dale Lomas (owner of Bridge to Gantry) said after witnessing the Viper turn a 7:01.3, "This is unbelievable, 6 months ago a 7 minute time would have been earth shattering."
Guys, we did the best we could with limited funds and time. I think we did well. (not even mentioning the difference in price of cars)