[WEC] Porsche Prototype Discussion

[GasperG]

Without battery, this means ERS-H feeds it's energy directly to front motor? IMO, that's worth very little, 30-40 HP?

Do we know % ERS-H of the whole ERS in normal operation? 2MJ or more?

[Spyderman]

I seem to remember that from the diagram ( and video) that Porsche had explaining the hybrid system, the power from both the breaking and the ERS-H was supplied to the battery. I think that the issue may have not been with the battery itself, but with the brakes. Coincidently (or not) the #2 suffered with a brake balance issue all weekend and so new brakes were fitted. Perhaps that was the root of the problem.

[Spyderman]

A new chassis for # 2 for Le Mans...and beyond. It seems that they still cant get to the bottom of the cause for the difference in pace between the two cars.

http://www.motorsport-total.com/wec/...-startnummer-2

[carbon_titanium]

Originally Posted by Spyderman

A new chassis for # 2 for Le Mans...and beyond. It seems that they still cant get to the bottom of the cause for the difference in pace between the two cars.

http://www.motorsport-total.com/wec/...-startnummer-2

mmmmmmmmm maybe #1 line-up has an average quality higher than the other?
also during last season, #17 has always been faster than #18

[Spyderman]

Well according to the article , when the #2 drivers drove the same car in testing, they were on the same pace as the #1 drivers. It's not the drivers. It's the chassis/car.

[Richard C]

Originally Posted by Spyderman

Well according to the article , when the #2 drivers drove the same car in testing, they were on the same pace as the #1 drivers. It's not the drivers. It's the chassis/car.

It seems counter intuitive given how much they might examine the car to track down problems, but it is not without precedent to do this. It seems like I have read multiple stories over the years of this type of thing happening. And sometimes at a later date they may discover the cause, or not.

I assume they generally tear down and rebuild the cars after each event and that they have a spare monocoque, so why not use that spare and build up a totally new #2. Hopefully it resolves the issue.

Richard

[chernaudi]

Sport Auto claims that Porsche have had battery issues and are thinking of switching back to their 2015 spec battery pack for LM, though it will cost some performance.

[porman]

If they are indeed having issues with the newer batteries, it may be a smart move to sacrifice some performance for reliability. From what we have seen thus far, reliability seems to be a linchpin in everyone's game. Throw 24 hours in to the equation and you start to have variables which cannot be accounted for in any testing, regardless of the duration. As long as the performance loss isn't substantial, it would almost seem like a forgone conclusion in reverting back to last year's battery come Le Mans.

[Spyderman]

Originally Posted by porman

If they are indeed having issues with the newer batteries, it may be a smart move to sacrifice some performance for reliability. From what we have seen thus far, reliability seems to be a linchpin in everyone's game. Throw 24 hours in to the equation and you start to have variables which cannot be accounted for in any testing, regardless of the duration. As long as the performance loss isn't substantial, it would almost seem like a forgone conclusion in reverting back to last year's battery come Le Mans.

This is not good news...again. This year so far, is really proving to be "character building". It started off with the Hitzinger surprise and it's been down hill since then.

Sent from my XT1092 using Tapatalk

[Victor_RO]

Originally Posted by Spyderman

This is not good news...again. This year so far, is really proving to be "character building". It started off with the Hitzinger surprise and it's been down hill since then.

It's been the same for all the factory teams, if you haven't noticed.

I think it's good that there's still reliability issues. If they affect all three works teams it'll just make Le Mans itself a lot more interesting. Plus it means they're all pushing the available tech.

[Spyderman]

Originally Posted by Victor_RO

It's been the same for all the factory teams, if you haven't noticed.

I think it's good that there's still reliability issues. If they affect all three works teams it'll just make Le Mans itself a lot more interesting. Plus it means they're all pushing the available tech.

Porsche have less excuse: their car is not new. They were supposed to be relying on stability for their title defense. So far, it's been everything but stable. Not very impressive so far.

Sent from my XT1092 using Tapatalk

[truebeliever]

Originally Posted by Richard Casto

It seems counter intuitive given how much they might examine the car to track down problems, but it is not without precedent to do this. It seems like I have read multiple stories over the years of this type of thing happening. And sometimes at a later date they may discover the cause, or not.

I assume they generally tear down and rebuild the cars after each event and that they have a spare monocoque, so why not use that spare and build up a totally new #2. Hopefully it resolves the issue.

Richard

Maybe they are racing the chassis that went throught he crash tests? It's possible it sustained some damage that is effecting it now. I am not sure what the protocol is with the factory cars, but one would assume that they do not race a crash test chassis, but maybe they do?

[Richard C]

Originally Posted by truebeliever

Maybe they are racing the chassis that went throught he crash tests? It's possible it sustained some damage that is effecting it now. I am not sure what the protocol is with the factory cars, but one would assume that they do not race a crash test chassis, but maybe they do?

My understanding (from a prior discussion that might have been WEC, might have been F1) is that items that are not tested to destruction are raced. But that they are inspected and repaired if needed. A similar process as if the car was involved in an accident during an event. Sometimes the damage is enough that the chassis is retired if it can't be adequately repaired.

Richard

[Artur]

If you wanna know more about 919's steering wheel and the functions of it's buttons:
http://www.porsche.com/international...ac9624&lang=en

[bjohnsonsmith]

Originally Posted by Artur

If you wanna know more about 919's steering wheel and the functions of it's buttons:
http://www.porsche.com/international...ac9624&lang=en

Blimey!

[Adam43]

Do you think the yellow dial in the middle goes up to 21 for Webber?

[bjohnsonsmith]

Originally Posted by Adam43

Do you think Webber can set the yellow dial in the middle to 21?

Haha.

[joeb]

Originally Posted by Adam43

Do you think the yellow dial in the middle goes up to 21 for Webber?

[Spyderman]

Porsche's last test before Le Mans at Aragon. Supposedly Audi testing there too.
https://twitter.com/neeljani/status/732837778464116736

[Spyderman]

Last test before Le Mans completed: 8,427km completed. 1.5 times LM distance.

[Spyderman]

http://www.24h-lemans.com/en/news/ro...746_24995.html

[Artur]

I think this bit is the most interesting to keep in mind:

The cars are so sophisticated now that they are highly sensitive to the slightest change in wind, temperature and the like. This is something that the engineers – ours and those at Audi and Toyota – have trouble taking on-board. In the past, everyone achieved their best times very early in the morning, but that’s not true these days. It’s not as predictable now. This is all the more true when the car has very advanced aerodynamics. We all know that every car sees its performance drop at some point in the race. It happens to everyone, so you have to be ready to adapt.

[Spyderman]

This is also not bad :

It’s true that, despite the victory at Silverstone after Audi’s disqualification, the season got off to a difficult start but our greatest asset is still our knowledge of the 919 Hybrid. It is now three years old and we are perhaps coming up against its limits but the latest tests in Spain show that reliability is our strength.

[Articus]

Funny comment, maybe they say that in reference to the Audi's breaking down in spain?

I'd call their speed, the Porsche's greatest strength.

[sssssssss]

i too thought maybe audi's silence is due to them not having good results at aragon. teams tend to brag a bit about their testing going well, getting a lot of mileage into the cars and so on. the fact that audi say absolutely nothing about the test, to such a degree that you might even think it didn't happen at all, doesn't look like a particularly good sign.