Porsche shatters the Nürburgring record we thought was unbreakable • Hacker News Board

Re: Porsche shatters the Nürburgring record we thought was unbreakable

#31

Post by ericcumbee » Sat, Jun 30, 2018, 8:22 PM UTC

forapurpose wrote: post #20

kirse wrote: post #14

Comically fast, like video-game-I-can-just-hit-restart fast. A couple highlights of that YouTube video from sections of the track that are notoriously difficult: [YouTube Time] 00:49 -> 00:53 - Flugplatz at nearly 170mph is insane. Total trust in downforce and makes up many seconds if done right. 01:13 -> 01:25 - Fuchsrohre bottoming out at 200+ mph is nuts. 03:15 -> 03:20 - Interesting that Timo avoids the carousel.…

Knowing nothing about this subject, I'm a bit confused by the parent: The first section talks about how incredible the performance is - "comically fast", "nuts", etc. The second to last paragraph seems to say that it is easily done. Would you explain to easily confused, non-car-racing-enthusiasts? EDIT: In fact, I should ask: What is the significance of Nurburgring?

The 919 was built originally to run in the LMP1-H class in the World Endurance Championship and the 24 hours of Le Mans. The WEC rules enforce some artifical performance limits on the car. For example they are limited on the amount of gasoline per lap they can use, and there is a max flow rate that is enforced by a fuel flow sensor. They are also limited in how much energy they can use per lap from the hybrid system. which is lower than the actual capacity of the hybrid system. for example you could watch the onboard with the telemetry that shows the battery status. They would come through Ford Chicane (The last before start finish at Le Mans) with the battery showing empty and then hit pit straight and come across start finish and the battery indicator would jump up to 1/4 or 1/2 full indicating that the car had harvested more power on that lap under braking than it was allowed to consume.

According to Porsche PR the WEC specification car the ICE put out 500hp. the EVO car did 720. and the Hybrid system went from 400 to 440hp.

Aero Development is also limited in WEC in not only the number of aero iterations you get per season, but what you can do like the size of the rear wing, and the rear diffuser. and of course they added a drag reduction system, that basically drops the rear wing out of the airflow on the straights to reduce drag.

they were also able to cut the weight by 39KG by taking out the windshield wipers, headlights, air conditioner and all the electronics that the FIA/ACO mandates in the WEC.

they also had a special tire.

as a point of comparison the 919 in WEC spec qualified at SPA for the 6 hour race with a 3 lap average 1:54.097. the evo did it this year in 1:41.770.

Re: Porsche shatters the Nürburgring record we thought was unbreakable

#32

Post by econ_th0 » Sat, Jun 30, 2018, 8:37 PM UTC

kirse wrote: post #14

Comically fast, like video-game-I-can-just-hit-restart fast. A couple highlights of that YouTube video from sections of the track that are notoriously difficult: [YouTube Time] 00:49 -> 00:53 - Flugplatz at nearly 170mph is insane. Total trust in downforce and makes up many seconds if done right. 01:13 -> 01:25 - Fuchsrohre bottoming out at 200+ mph is nuts. 03:15 -> 03:20 - Interesting that Timo avoids the carousel.…

is it not kmh?

Re: Porsche shatters the Nürburgring record we thought was unbreakable

#33

Post by kirse » Sat, Jun 30, 2018, 8:42 PM UTC

makmanalp wrote: post #27

kirse wrote: post #14

Comically fast, like video-game-I-can-just-hit-restart fast. A couple highlights of that YouTube video from sections of the track that are notoriously difficult: [YouTube Time] 00:49 -> 00:53 - Flugplatz at nearly 170mph is insane. Total trust in downforce and makes up many seconds if done right. 01:13 -> 01:25 - Fuchsrohre bottoming out at 200+ mph is nuts. 03:15 -> 03:20 - Interesting that Timo avoids the carousel.…

As someone who knows nothing about cars, what surprised me was just how much of this was braking right after you accelerate, which in hindsight is obvious given the turns at crazy speeds, but still.

A good eye. One of the biggest lessons taught in any advanced car control course is that the brakes/gas aren't just for stopping/going. By using them to modulate weight transfer you can change grip levels at F/R, adjust vehicle yaw (+/- turning radius), smooth out suspension undulations, etc.

Re: Porsche shatters the Nürburgring record we thought was unbreakable

#34

Post by milesokeefe » Sat, Jun 30, 2018, 8:42 PM UTC

grecy wrote: post #13

I have been daydreaming lately about how the Tesla Roadster 2 should be easily able to take the record around the ring for a production car. I'm hoping it will smash the record.

Rimac’s Concept Two is a also a contender, I’ll be interested to see which ends up on top - the concept two beats the roadster 2 by a hair on 0-60 and 0-100 but lags behind in quarter mile.

https://en.m.wikipedia.org/wiki/Rimac_C_Two

Re: Porsche shatters the Nürburgring record we thought was unbreakable

#35

Post by bertjk » Sat, Jun 30, 2018, 8:42 PM UTC

I would love to see how fast this can be done by a customized self driving car. (think: full knowledge of track geometries, of its own physical specifications, etc..)

Re: Porsche shatters the Nürburgring record we thought was unbreakable

#36

Post by njarboe » Sat, Jun 30, 2018, 8:47 PM UTC

econ_th0 wrote: post #32

kirse wrote: post #14

Comically fast, like video-game-I-can-just-hit-restart fast. A couple highlights of that YouTube video from sections of the track that are notoriously difficult: [YouTube Time] 00:49 -> 00:53 - Flugplatz at nearly 170mph is insane. Total trust in downforce and makes up many seconds if done right. 01:13 -> 01:25 - Fuchsrohre bottoming out at 200+ mph is nuts. 03:15 -> 03:20 - Interesting that Timo avoids the carousel.…

is it not kmh?

Yes. Unless somehow they are getting to a top speed of 370mph and seem to be engine rpm limited at that.

Re: Porsche shatters the Nürburgring record we thought was unbreakable

#37

Post by anxiouspete » Sat, Jun 30, 2018, 8:56 PM UTC

grecy wrote: post #13

I have been daydreaming lately about how the Tesla Roadster 2 should be easily able to take the record around the ring for a production car. I'm hoping it will smash the record.

Unless Tesla can get the weight down of the Roadster 2 it doesn't have a chance beating the GT2-RS or the Huracan Perfomante.

Re: Porsche shatters the Nürburgring record we thought was unbreakable

#38

Post by IshKebab » Sat, Jun 30, 2018, 9:01 PM UTC

bertjk wrote: post #35

I would love to see how fast this can be done by a customized self driving car. (think: full knowledge of track geometries, of its own physical specifications, etc..)

Well there's the driverless race series that they've been promising for a while so hopefully will know fairly soon.

Re: Porsche shatters the Nürburgring record we thought was unbreakable

#39

Post by jacquesm » Sat, Jun 30, 2018, 9:11 PM UTC

kirse wrote: post #14

Comically fast, like video-game-I-can-just-hit-restart fast. A couple highlights of that YouTube video from sections of the track that are notoriously difficult: [YouTube Time] 00:49 -> 00:53 - Flugplatz at nearly 170mph is insane. Total trust in downforce and makes up many seconds if done right. 01:13 -> 01:25 - Fuchsrohre bottoming out at 200+ mph is nuts. 03:15 -> 03:20 - Interesting that Timo avoids the carousel.…

Too late to edit but Pflanzgarten has been renamed in honor of Bellof.

Re: Porsche shatters the Nürburgring record we thought was unbreakable

#40

Post by maxxxxx » Sat, Jun 30, 2018, 9:18 PM UTC

forapurpose wrote: post #20

kirse wrote: post #14

Comically fast, like video-game-I-can-just-hit-restart fast. A couple highlights of that YouTube video from sections of the track that are notoriously difficult: [YouTube Time] 00:49 -> 00:53 - Flugplatz at nearly 170mph is insane. Total trust in downforce and makes up many seconds if done right. 01:13 -> 01:25 - Fuchsrohre bottoming out at 200+ mph is nuts. 03:15 -> 03:20 - Interesting that Timo avoids the carousel.…

Knowing nothing about this subject, I'm a bit confused by the parent: The first section talks about how incredible the performance is - "comically fast", "nuts", etc. The second to last paragraph seems to say that it is easily done. Would you explain to easily confused, non-car-racing-enthusiasts? EDIT: In fact, I should ask: What is the significance of Nurburgring?

"What is the significance of Nurburgring?"

It's a very long and very tricky track. It has everything: superfast sections, slow sections, steep uphill and downhill, bumps, banking, often wet. If a car does well on this track it will do well almost everywhere. It's called the "green hell". I don't think there is another track worldwide left that can compare.