Viper ACR vs Porsche GT2 RS

[Snakebit10]

Finally the race I’ve been itching to see on shorter than Nurburgring tracks.

Battle at Zolder.

It’s in another language and do not understand a lot of what’s said. But I can read the timer. Nice footage of both beasts doing what they do best.

https://youtu.be/-4Mh-Y9h1y4

[bullitt2735]

awesome! click on the settings icon, cc captioning and select auto translate. Its not perfect by any means but gives you most of what they are saying

[stradman]

Finally the race I’ve been itching to see on shorter than Nurburgring tracks.

Battle at Zolder.

It’s in another language and do not understand a lot of what’s said. But I can read the timer. Nice footage of both beasts doing what they do best.

https://youtu.be/-4Mh-Y9h1y4

old video that....

[Scott_in_fl]

Cool video, and the result seems about right. Clearly, the cars were driven well.

But a 1:37 lap track is very small for cars. I think many cars could be tightly grouped on lap times around a track that size.

I'd love to see these types of tests done on longer tracks that have a good mix of corner types with at least one nice straight. Laguna Seca could be the best, but VIR is good, Road America, Road Atlanta, Barber, COTA, would be pretty good too. It would be awesome to get the latest cars out there with the ACR-E, and find some way to put them on equal rubber.

[Snakebit10]

Man I hate the way Youtube was ruined. The vid popped up in my feed a day ago so I thought it was re3cent. Just noticed it was a year old when Strad mentioned it. Sorry bout that.

Yeah I think on longer tracks with longer straights the Porsche will win easily. Its just much faster accelerating and has enough down force to not be far off the Viper in turns. Two of the best track beasts though. Just wish there was a new Viper to contend with the newer crop of killers.

[SRT_BluByU]

There is.. Prefix/Arrow Racing.

/Thread

[Scott_in_fl]

Yeah I think on longer tracks with longer straights the Porsche will win easily. Its just much faster accelerating and has enough down force to not be far off the Viper in turns. Two of the best track beasts though. Just wish there was a new Viper to contend with the newer crop of killers.

The GT2RS is a quicker car, but an ACR-E is going to be very, very close on 99% of the tracks out there. In fact, my hunch is that tires and downforce settings could have very well made up the difference on the track shown in the video (and most other tracks as well).

The ACR-E has 2000lbs of downforce at 150mph on its highest settings, whereas the 911GT2RS has 1/2 that amount.

As we know with high downforce racecars, the downforce advantage is huge as long as the tires can hold it. The mid-corner speed on fast sweepers can be much higher with the extra pressure pushing the car against the track. Since most tracks would not see the GT2RS exceeding 180mph (the max speed of the ACR-E), any power or shifting advantage of the GT2RS should be marginalized.

Thus, with the test shown in the video posted by the OP, it would have been interesting to see what lap times could be achieved if the wing were adjusted into its different settings (especially on a short track that looked to be full of turns and very few straights).

[Bruce H.]

Lots of differences beyond down force that affect their performance and give the GT advantages. The GT has 4 wheel steering, much broader power band with the turbos, an extra gear, higher redline and PDK that optimizes every gear everywhere around the track, and a rear weight bias that gives it a grip advantage under braking and corner exit acceleration.

[serpent]

Lots of differences beyond down force that affect their performance and give the GT advantages. The GT has 4 wheel steering, much broader power band with the turbos, an extra gear, higher redline and PDK that optimizes every gear everywhere around the track, and a rear weight bias that gives it a grip advantage under braking and corner exit acceleration.
Agreed, Arizona Vipers has already stated that the ACR shines in corner grip.

Tracks like VIR, Cota, Road America and even Road Atlanta it will not be close, straights are long and these cars are in different leagues when it comes to acceleration. Just look at what they trap in the 1/4 mile, one traps 126-128 maybe 129, the other traps 134-139mph.

[Scott_in_fl]

Yeah, but we still don't have much for lap times. In fact, of the few we have, Randy Pobst has driven both the ACR-E and the GT2RS at Laguna, and guess what? They both turned 1:28. https://www.motortrend.com/news/porsche-911-gt2-rs-2018-best-drivers-car-contender/

So, it is quite close on most tracks. Remember, the acceleration on straights is often easily overcome with a higher exit speed out of the turn before it.

Thus, if an ACR-E can carry 5mph more out of a turn (which is very likely with 1,000lbs more DF), then it has a huuuuuuge head start on getting down the straight to the next turn (which, oh by the way, a high DF car can also enter at higher speeds).

Hey, I'm with 'ya -- the GT2RS is awesome. I love Pcars. It will blow doors on the street in roll races and any acceleration contest. But on a track, you get into a bunch of other dynamics that can keep an ACR-E mighty close.

I'd love to see more times from same/similar drivers at same track with the ACR-E and not just GT2RS, but also 720S, New Ford GT, Performante, ZR1, etc. But for some reason, those are very hard to come by. Are those cars hiding? :)