[WEC] Porsche Prototype Discussion

[MyNameIsNigel]

Is there any official figure quoted by Porsche in respect of the power of the MGU connected to the front drive train on the 2015-spec 919 ?

[cokata]

Originally Posted by MyNameIsNigel

Is there any official figure quoted by Porsche in respect of the power of the MGU connected to the front drive train on the 2015-spec 919 ?

400+ bhp i believe.

[Spyderman]

Originally Posted by cokata

400+ bhp i believe.

Correct, but with one very subtle difference. They now write <400bhp.

[GasperG]

No, they write: > 400 hp
http://www.porsche.com/international...turesandspecs/

That may be the reason for more front tyres degradation compared to Toyota and Audi. Audi officially uses 272 hp on the front and Toyota distributes 480 HP on both axels.

[Spyderman]

Correct. My apologies. I messed up the sign.

I have no doubt that it is what is causing the front tire issues. I'm confident they will solve it (or at least manage it) but I'm not sure it will get sorted out in time for Le Mans.

[PorscheFanNo1]

Clearly its a lot more then 400bhp, seeing as they easily outrun Toyota in acceleration, and Toyota claims 480 (that to be honest is likely to be a bit shy of the real number anyway).

It would be interesting to see a compleat lap at LeMans this year onboard the Porsche with telemetry, where we can count the exact number of seconds they use their hybrid motors over a compleat lap, then its easy to calculate how much power they are putting out.
However, we cant really know for sure the electric motors are running at the same power all the time, they could easily put out more power at the first 1-2 seconds they are deployed, and then gradually decrease the power until they stop compleatly. So it would only be an average output of the hybrid.

[GasperG]

The problem with Toyota is that they MUST boost out of every corner, Porsche can wait for a corner with longest straight and release more energy out of that corner and ofcourse even if both uses all the boost out of every corner Porsche has 33% more energy to boost.

Who will outrun who out of the corner?
- 1 MJ with 480 HP
- 2 MJ with 400 HP

[Spyderman]

Yes, and I think that the management of how the power is released and laid down , will be played with until they come up with the best possible solution for their tire-wear issues.

[CTD]

Originally Posted by Simmi

The fact Earl Bamber walked out of a Porsche cup car and straight into a P1 kind of flies in the face of what Michael says.

But I'd love to see him in a 919 in the future and I know you would too Mathias.

Very true!
And comparing the two's career, Bamber has less experience that Michael, even though they started at the same time.
Either Bamber is a bigger talent, or something/someone else gave Bamber the upper hand (Webber?)

You are 100% right there Richard! In my mind Christensen and K.Magnussen are the guys who is going to lift Tom Kristensen heritage

[PorscheFanNo1]

Originally Posted by GasperG

The problem with Toyota is that they MUST boost out of every corner, Porsche can wait for a corner with longest straight and release more energy out of that corner

Whats the reason for Toyota must boost out of every corner, while Porsche doesnt? Just the fact that Porsche has 2MJ more, or am I missing something here?

[GasperG]

Battery vs. supercapacitor

Battery must be "oversized" so it can deal with higher power, note that size/weight is not necessarily bigger than supercap. It was mentioned last year by someone that Porsche can hold all of it's 6 MJ capacity on board, don't know how is this year. Toyota supercap can only hold a fraction of total 6 MJ If I would have to guess only around 1 to 1.5 MJ.

[PorscheFanNo1]

That makes sence! This would be the reason why Toyota is rumoured to be looking at switching from supercap to battery next year, I would presume?

On the other hand, Le Mans would be the kind of stop-and-go track that would least favour the batterys in this scenario, since after each big braking there would be a long straight where you would want to boost anyway.

[J Jay]

Originally Posted by CTD

Very true!
And comparing the two's career, Bamber has less experience that Michael, even though they started at the same time.
Either Bamber is a bigger talent, or something/someone else gave Bamber the upper hand (Webber?)

It could be the case that Bamber is more familiar with influential people in the Porsche program than Christensen is, but given the almost meteoric speed at which Earl has risen through the ranks I think it'd be fairer to day that he is seen as the bigger talent.

But that's not a slight on Michael, I reckon he will be in a 919 sooner rather than later.

Originally Posted by GasperG

Battery vs. supercapacitor

Battery must be "oversized" so it can deal with higher power, note that size/weight is not necessarily bigger than supercap. It was mentioned last year by someone that Porsche can hold all of it's 6 MJ capacity on board, don't know how is this year. Toyota supercap can only hold a fraction of total 6 MJ If I would have to guess only around 1 to 1.5 MJ.

An issue of RCE this year had a feature on Toyota which mentioned the size of the supercap. I can't remember the figure now though (I chuck them as soon as I've read them as well) but 1MJ sounds familiar.

[Spyderman]

Bamber was very impressive (as usual) at Spa.
He had the fastest average lap time in car #19. I know it is not as straight forward as it seems due to the tire strategy, but for a rookie, he was simply magnificent!

[Simmi]

Have to agree I think there was a shoot-out and Bamber won. He had to be doubly impressive as I think he'd had less testing time in the 919 before being given the nod.

I guess he'll be battling it out with Hulkenberg for that fastest rookie plaque at Le Mans.

[carbon_titanium]

Originally Posted by Spyderman

Bamber was very impressive (as usual) at Spa.
He had the fastest average lap time in car #19. I know it is not as straight forward as it seems due to the tire strategy, but for a rookie, he was simply magnificent!

agree, the one who disappointed was Tandy! not so fast and a traffic rush mistake that simply can't be done in the first hour of race!
Infact Makowiecki will be in the 919 during the le mans test. If he will mark faster laptimes than Tandy during the test, surely Makowiecki will take his seat in the #19 for 24H le mans

[Akrapovic]

Originally Posted by carbon_titanium

Infact Makowiecki will be in the 919 during the le mans test. If he will mark faster laptimes than Tandy during the test, surely Makowiecki will take his seat in the #19 for 24H le mans

Is that confirmed? Sounds good.

[MyNameIsNigel]

Originally Posted by cokata

400+ bhp i believe.

Originally Posted by GasperG

No, they write: > 400 hp
http://www.porsche.com/international...turesandspecs/

That may be the reason for more front tyres degradation compared to Toyota and Audi. Audi officially uses 272 hp on the front and Toyota distributes 480 HP on both axels.

Thanks guys.

[Spyderman]

Originally Posted by carbon_titanium

agree, the one who disappointed was Tandy! not so fast and a traffic rush mistake that simply can't be done in the first hour of race!
Infact Makowiecki will be in the 919 during the le mans test. If he will mark faster laptimes than Tandy during the test, surely Makowiecki will take his seat in the #19 for 24H le mans

Not disagreeing with you but in fairness, Tandy did set the fastest lap for #19 and the average of his Top 10 times are identical to Hulkenburg's. I agree fully on the mistake. It was unnecessary and costly.
I think that neither he nor Hulkenburg did a bad job; its just that Bamber is outstanding.

[Simmi]

Originally Posted by Akrapovic

Is that confirmed? Sounds good.

Unconfirmed speculation which won't happen.

[Articus]

Originally Posted by GasperG

Battery vs. supercapacitor

Battery must be "oversized" so it can deal with higher power, note that size/weight is not necessarily bigger than supercap. It was mentioned last year by someone that Porsche can hold all of it's 6 MJ capacity on board, don't know how is this year. Toyota supercap can only hold a fraction of total 6 MJ If I would have to guess only around 1 to 1.5 MJ.

exactly. Oh and I'll just leave this here. Consider it a must read for all the battery nerds AND anyone who doesn't know the first thing about batteries .
https://medium.com/@steingart/the-un...n-ce1e44d0b961

[cokata]

Originally Posted by GasperG

Battery vs. supercapacitor

Battery must be "oversized" so it can deal with higher power, note that size/weight is not necessarily bigger than supercap. It was mentioned last year by someone that Porsche can hold all of it's 6 MJ capacity on board, don't know how is this year. Toyota supercap can only hold a fraction of total 6 MJ If I would have to guess only around 1 to 1.5 MJ.

The 2014 car had 0.9MJ capacity i believe. This year probably something around 1.2-1.3 MJ

[Spyderman]

I did some driver times analysis which I thought you guys might enjoy, however I cant get an excel table to post. Does anyone know how it is done?

[Chuliandred]

Originally Posted by Spyderman

I did some driver times analysis which I thought you guys might enjoy, however I cant get an excel table to post. Does anyone know how it is done?

How about pasting it to google docs and sharing the link? You can set the table to "view only" their as well. I can't think about a forum which supports tables sufficiently.

[Spyderman]

Thanks! - I'll have to check that out later and see if it is viable.