A One Off? 991 GT3RS fire!

A One Off? 991 GT3RS fire!

Author
Discussion

LaSource

2,622 posts

207 months

Wednesday 26th August 2015
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Lol.....

Housey

2,076 posts

226 months

Wednesday 26th August 2015
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mollytherocker

14,365 posts

208 months

Wednesday 26th August 2015
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LordOfTheManor said:
just bought this !
Dont worry, Lambos dont set on fire. Er..... Much.

Nice though!

911Viking

299 posts

143 months

Wednesday 26th August 2015
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NIgt3 said:
Mezger not retired yet, Porsche still see fit to race it in their motorsport cars.
True... But thats motorsport and its not really competitive there any longer either. GT3/RS always been a fast'ish road cars you can fiddle round a track for fun, but its by no means a race car. Though aero on 991RS is getting closer to race car experience for there braver.

hunter 66

3,888 posts

219 months

Wednesday 26th August 2015
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And we have had a blow up ..... so what part of life ....... when racing a rebuild of an RSR engine every 50 hours is part of reducing this issue..

mollytherocker

14,365 posts

208 months

Wednesday 26th August 2015
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hunter 66 said:
And we have had a blow up ..... so what part of life ....... when racing a rebuild of an RSR engine every 50 hours is part of reducing this issue..
2 blow ups that we know of.

And comparisons between a road car and a lifed racing engine are moot.

Mermaid

21,492 posts

170 months

Wednesday 26th August 2015
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Boxsters don't catch fire, Caymans don't, Cayennes, Panameras, non GT3 911's don't. So what is the vulnerable point?

High revs?



keep it lit

3,388 posts

166 months

Wednesday 26th August 2015
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911Viking said:
NIgt3 said:
Mezger not retired yet, Porsche still see fit to race it in their motorsport cars.
True...
phew smile

mollytherocker

14,365 posts

208 months

Wednesday 26th August 2015
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Mermaid said:
Boxsters don't catch fire, Caymans don't, Cayennes, Panameras, non GT3 911's don't. So what is the vulnerable point?

High revs?
I doubt its as simple as revs. The non RS was the con rod bolts if we are happy to believe Porsche. We will never know.

What has caused the RS fires? We will probably never know for sure either.

GaryF

970 posts

252 months

Wednesday 26th August 2015
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keep it lit said:
phew smile
Keep it lit, can you account for your whereabouts at the time of the fire?

gordonc

264 posts

251 months

Wednesday 26th August 2015
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prob in his bath

Housey

2,076 posts

226 months

Wednesday 26th August 2015
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Mermaid said:
Boxsters don't catch fire, Caymans don't, Cayennes, Panameras, non GT3 911's don't. So what is the vulnerable point?

High revs?
It's all the Apprentice wannabes who buy them these days. The static from their suits I suspect...or from their racing boots when on the road. hehe

keep it lit

3,388 posts

166 months

Wednesday 26th August 2015
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GaryF said:
Keep it lit, can you account for your whereabouts at the time of the fire?
on the rollers with my new baby officer !


keep it lit

3,388 posts

166 months

Wednesday 26th August 2015
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gordonc said:
prob in his bath
good one for you big man wink



...... but your paying your own VAT now!!

see you over there pal. xxx

EricE

1,945 posts

128 months

Thursday 27th August 2015
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Here's the german thread on pff.de with some additonal info.

http://www.pff.de/porsche/board104-porsche-modelle...

Posters who were there said the first engine lunched itself on the way home from factory collection (posting #2317) and he was still running in the second one when it blew up (posting #2311).

I think that's about as much info as we will get.
Now why he would run in an engine on a racetrack... confused

My personal opinion is that Porsche was a bit too optimistic with the redline in the 991 GT3 and the aggressive shifting strategy of the PDK-S exacerbates this issue because it really does keep the revs up there when you pin it, arguably more so than a manual would. They backed down on the redline a bit with the RS but apparently not enough.

I recall watching a video with Walter Röhrl in the 991 GT3 and he commented that he always pulls the paddle at 7500 rpm because he has mechanical sympathy for the car. I thought that was strange but now I wonder if he knew something back then that we didn't. smile

Edited by EricE on Thursday 27th August 06:49

Yellow491

2,911 posts

118 months

Thursday 27th August 2015
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hunter 66 said:
And we have had a blow up ..... so what part of life ....... when racing a rebuild of an RSR engine every 50 hours is part of reducing this issue..
Mate porsche never used to do this on so called flagship model road cars,the last1000 rpm will always be expensive one way or another.A good place for a fine steak chef to strutt his stuff,what better than a porsche designed bbqsmile

Pdk in full dull sport mode is brutal on the top revs,as is a sequential.I remember my trip out in the old silver beast after it had gone from manuel to a holinger,i thought F poor engine!,

I ran my last new toy in on a race track,probaly no better place!

LordOfTheManor

1,267 posts

110 months

Thursday 27th August 2015
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Has anyone said any more about the RS catching fire !

swimd

350 posts

120 months

Friday 28th August 2015
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I would really like to see a privateer team enter a 991 GT3 RS for the 24 hours of Le Mans just to see what happens.

Back in the 70s people ran very lightly modified 911S with stock 2.0S/2.2S engines at Le Mans and had very few problems. That's 24 hours, full throttle and over 85% of max RPM most of the time at an average speed fairly close to the top speed of the car. Based on the recent reports I am not too convinced many 991 GT3/GT3 RS would survive that.

mollytherocker

14,365 posts

208 months

Friday 28th August 2015
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swimd said:
I would really like to see a privateer team enter a 991 GT3 RS for the 24 hours of Le Mans just to see what happens.

Back in the 70s people ran very lightly modified 911S with stock 2.0S/2.2S engines at Le Mans and had very few problems. That's 24 hours, full throttle and over 85% of max RPM most of the time at an average speed fairly close to the top speed of the car. Based on the recent reports I am not too convinced many 991 GT3/GT3 RS would survive that.
Chris Harris did the Ring 24 in a stock 997 GT3 RS didn't he? It went to the end with no problems.

sidicks

25,218 posts

220 months

Friday 28th August 2015
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mollytherocker said:
Chris Harris did the Ring 24 in a stock 997 GT3 RS didn't he? It went to the end with no problems.
Also drove it from the UK to the ring and home again, if I remember correctly!