997 Turbo / GT2 2006–2012 Turbo discussion on the 997 model Porsche 911 Twin Turbo.
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Old Feb 21, 2010 | 07:12 PM
  #16  
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Originally Posted by speed21
No sense crying over spilt milk.......and look on the bright side....you had a lot of fun doing it anyway .

GTSilver2010 has the right approach to me. The 3.8 engine has plenty of torque down low so why bother wringing the living lord out of it now when there will be plenty of time to do that later on after all the running surfaces have got to know one another properly.

And salesman's advice.....too funny on that . Since when did you start believing a car salesman? .
I'dve honestly said the smart thing to do for all those with genuine doubts would be to ask your dealer to email Porsche AG's "R and D" dept and get a formal response why they wrote the owners manual running in procedures if they are totally meaningless . Hilarious!!!!!

Thats why I buy new Porsches only . Theres just way too many experts and too many theories out there.
+ a frocking million!!!
 
Old Feb 21, 2010 | 07:59 PM
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So at what rpm do you let your foot off the gas? Up to 4.5k?

Originally Posted by GTsilver2010
I'm at 1300 miles and counting. Should be at 2k miles in another 14 days. I don't see it as a big deal to drive gently for the first 2k miles. The 3.8 motor has plenty of torque down low.
 
Old Feb 21, 2010 | 08:14 PM
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Originally Posted by my997turbo
My salesman told me to do lots of runs from 50-80 mph, it gets the cylinders adjusted.
Please ask him what it is about the cylinders that need to be adjusted. I'd like to know his response.

bob
 
Old Feb 21, 2010 | 08:15 PM
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^^^ Follow your manual. Keeps the rpms below 4200 without any full throttle applications. Be certain to vary your engine speed and throttle and keep short trips to a minimum. Drive slowly until the oil temp reaches 170-180 degrees F or above. Load the engine then decelerate going down long hills if you can. Deceleration helps pull more oil into the cylinders. No constant speeds and no cruise control. Never lug the engine. Drive slowly for a couple to a few miles before your destination to help cool the engine and turbos. Yes the turbos get oil fed to them post shut down, but it's still a smart move.
 
Old Feb 21, 2010 | 08:19 PM
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Originally Posted by dksu
Yesterday for like 30 mins I did couple 6-7k rpm short runs. I'm now worried.
Porsche tests every engine before installation.

Every engine is dyno'ed before it is put into the car. Full engine dyno runs before installation to confirm HP production is 101-105% of specifications. 5-10 minutes full range RPM use.

That should make you feel better.
 

Last edited by bbywu; Feb 21, 2010 at 09:03 PM.
Old Feb 21, 2010 | 08:37 PM
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Drive it like you plan on driving it, don't over rev it and you will be fine.
 
Old Feb 21, 2010 | 09:09 PM
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Originally Posted by bbywu
Please ask him what it is about the cylinders that need to be adjusted. I'd like to know his response.

bob
Me too on that one..
I can only imagine the kind of answer you'll get. Make sure to bring a shovel and a bucket (PS:make it a big one)
 
Old Feb 21, 2010 | 09:29 PM
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Originally Posted by dksu
So at what rpm do you let your foot off the gas? Up to 4.5k?
I rarely let it get to 4k. The great thing about the PDK is if I just let off the gas a little it will upshift a gear so I drop down in RPM immediately.

A couple times I was a bit surprised at how quickly RPM's climbed but just let off the gas a bit and it will immediately upshift. Remember Im not really stepping on the pedal hard, thats why it will upshift. This is really easy for me since I'm used to barely pushing the throttle from driving the supercharged SLK.

I'm usually driving in Sports mode with the suspension on soft. I'm also averaging 20 mpg. Since this is my daily driver, during the commute, I will downshift a few times just to make sure that the RPM's aren't sitting at the same amount all the time. Once you downshift in sports mode, it will stay there for maybe 30 secs then upshift again.

Btw I'm leasing this car ... so I guess I don't really have to care. But I have a couple friends that would like to buy the car after the lease is over so I'm trying to make sure everything is done well.
 

Last edited by GTsilver2010; Feb 21, 2010 at 09:34 PM.
Old Feb 21, 2010 | 09:30 PM
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Originally Posted by bbywu
Porsche tests every engine before installation.

Every engine is dyno'ed before it is put into the car. Full engine dyno runs before installation to confirm HP production is 101-105% of specifications. 5-10 minutes full range RPM use.

That should make you feel better.
I think someone already mentioned this, but its really not just about the engine.
 
Old Feb 22, 2010 | 07:11 AM
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Originally Posted by bbywu
Porsche tests every engine before installation.

Every engine is dyno'ed before it is put into the car. Full engine dyno runs before installation to confirm HP production is 101-105% of specifications. 5-10 minutes full range RPM use.

That should make you feel better.
There are very strong rumors that all engines are NOT hot tested. It is strongly rumored that hot testing all cars ceased when the .2 911 was introduced, which includes the new turbo of course. 1 out of 10 .2 cars may be hot tested, which by no means removes the need to break-in an engine.

Supposedly (and again rumored), all GT cars are still hot tested: GT2, GT3/RS.

Rennlist had a very good thread regarding this very topic. There is Porsche inter-net data to support the hot testing theory, but Porsche is cautious above how they discuss the topic. It is also uncertain how old the data is.
 
Old Feb 22, 2010 | 07:20 AM
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Originally Posted by landjet
A race engine is rebuilt very often, maybe after every race, so I don't think that comparison is a smart strategy for the street car. I could be completely wrong, but common sense says bedding in all the parts for a few thousand miles would be beneficial. Of course xseal paid his money so can drive his car anyway he wants, I just won't be the guy to buy it from him second hand.
The point is that, given modern technology and the development of the sort of metals/alloys used in modern engines, common sense is wrong.

Do you think that breaking in the Rolex 24 engines isn't done to optimize reliability. I don't know anything about Porsches, I've owned my 997tt for a month (its going to TPC next week for suspension and a flash). But I've road raced motorcycles (Ducatis, Kawasakis, Suzukis) competitively for years and learned alot about engine building, and my experience is that the best way to break in engines is as described in the link, and many knowledgeable engine builders will agree. This is one of those subjects that reasonable people can disagree on, but that's part of what makes for an interesting conversation and makes it possible for gear heads like us to talk in the garage for hours over a beer.
 
Old Feb 22, 2010 | 07:56 AM
  #27  
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Break-In Year

What kills me about the 2000 break-in miles is that is almost a year of driving this car for me. Even if I road trip it to get there quicker, I'll have to really vary my speed on the highway. Now, I don't mind moving between 70-140, keeping the RPMs below 4500, but that will increase my cost of ownership.

My new .2 arrives tomorrow and will sit in the garage in Vail until the snow melts. Ugh.
 
Old Feb 22, 2010 | 08:12 AM
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What's so magic about 2000 miles? Since the break in used to be 1000 miles for years. And somebody needs to tell Porsche because they are taking brand new cars straight to the track at the Porsche Sport Driving School, those cars carry a full factory warranty. The 2000 mile break in is bullsh@t, take it easy the first 500 miles then go hard.
 

Last edited by TT Gasman; Feb 22, 2010 at 08:14 AM.
Old Feb 22, 2010 | 08:16 AM
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someone may have already mentioned this but arent the US manuals the only ones with break in guidelines so strict?
 
Old Feb 22, 2010 | 09:33 AM
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Originally Posted by my997turbo
My salesman told me to do lots of runs from 50-80 mph, it gets the cylinders adjusted.
Cylinders adjusted?? And your salesman knows this how??
 


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