Break-in Period
 

Is there one? If so, what is it? What does the owner's manual say on this topic? Are you guys abiding by it?

My plan for the European Delivery, not surprisingly, will be to drive the snot out of it on the autobahn... But then I gave pause and thought about a break-in period, if there is one...

Long thread on this topic here:

https://rennlist.com/forums/991-gt3/...-for-gt3s.html

I don't know what the current owner's manual has to say....hope to know soon.

Thanks! I just read the entire thread....

That TOTALLY cleared up the issue. ;)

I figured it would....:roflmao:

:D

2,000 miles. :eek:

Just ask the factory rep when you pick up the car.

Same as always.....what rev limit is specified....4200 rpm?

Yes, which makes little sense for a 9,000 RPM engine. I suspect it's the usual stamp. I did what I understood Macca was told, one tank to 7,000, then bam!

I have no idea how I'm not going to fall to temptation. The fun is barely starting at 4200!

I tend to side with the ROW recommendations, but that's just me :)

Thanks. The info that I have which came through someone else, but was from AP, was stay under 7K rpm for the first 400 miles (would equate to just about 1 tank) then step up gradually after that, so not quite "bam!" ;) By 800-1000 miles everything should be broken in. Besides that, no long stretches at steady RPM, complete oil warm-up, the usual stuff....

Um, uh, yeah, I did all that. That video wasn't me. :burnout:

BS! They already ran the motor out... Same BS I have heard for 15 yrs... Drive it

Lol!!!!

I don't know if this is the same for the "rest of the world", but here's an excerpt from the UK GT3 owners manual.

https://dl.dropboxusercontent.com/u/...nning%20In.jpg

.

It's your car, break it in however you want, but no, they haven't......

A few percent (single digits) of motors are pulled off the line and briefly run in hot for quality control purposes. The vast majority are not.

At the end of the production line, each car is run on a rolling test bed for a couple of minutes at speeds up to 70-80 mph. That's it.

Where exactly in the production process do you think that the motors are "run out"?

Exactly +991

Exactly. "Running- in cannot be completely avoided" means that Porsche assembles and heat cycles the rotating assembly but they can't completely break the motor in for the consumer. There's a lot of initial wear that will happen and that's why they recommend "long trips" so that you get some nice long heat cycles into your motor which make the Porsche gods (peace be upon them) smile and bless thine engine.

Agree. Just to be clear, except for the very few engines that are run in hot for quality control purposes, most engines are not even heat cycled. The new engine production line has a station where every engine is spun cold on a computer monitored rig before the intake and exhaust assemblies are installed to make sure that all rotating clearances are correct. But the days when every engine was dyno tested and heat cycled are long past.

You are 1000% right and understand the facts ...I am a firm believer in drive it like you will drive it... Never had a main seal leak or any other issue in the past .. It's the same ole stuff we have heard since the inception of rennlist!! Lol do what seams best to you read the book ... I still think like many years ago the attorneys of Porsche want you to learn the car before you kill yourself or someone else lol

I wonder did this conversation exist on the 964, 993?

But this is only my opinion.. Based on past exp.. I wonder how many 997 failures are due to" improper break in" just curious I haven't been following this.. How many 991 failures are out there ?

I'm not arguing btw just curious... Are there real numbers out there?

This is from the book
http://i1264.photobucket.com/albums/...F5322FD5EA.jpg

Mike btw nice color

Fair enough. I wasn't saying I disagreed with your break-in approach, only that Porsche doesn't run out the engines. Everyone needs to approach this with their own level of comfort.

I think the reason this subject is so open to argument is that there is no definitive study I'm aware of that proves what the best way to break-in is or hard numbers about failures. Porsche isn't going to hand out that kind of info. So we all get to argue our own opinions on the subject! :cheers:

Hope car here soon! They will cover what they want to cover lol

I might be concerned that if the recommended break-in wasn't followed, the warranty may be void. Obviously they would have access to all that info if they needed it.

Mine has never gone over 3k yet

:roflmao:

I've broken in a good six 911 race engines that we rebuilt. Never had a failure due to how it was broke in. Are you going to drive the the car past 100k? Honestly. I don't think it makes any longterm difference how the early miles are driven. I could be wrong, anyone know any different?

Matt those damn iPhones - you missed the 9. In front of the 3k!

Outstanding....

uh yeah, I can independently verify that matt has definitely gone over 3k rpm in his GT3

This has me re-thinking the Euro Delivery... My intention was to drive the snot out of it on the autobahn while there. But I'll be lucky to get enough miles on it to get through the break-in period!

The ED is such a great experience, you ought to still do it. So much great driving to do nonetheless.

Same debate as ever on each new GT3. I think I'll use the oil temperature gauge as the break-in period.

Any difference with an RS?

So I have been struggling with this break in period of 2m miles which seems crazy. From what you heard from who I would think would be the authority in this , AP himself, who better but the head of GT cars to stay under 7k til 400 then open it up by800-1000, this seems to make sense. The fact that the ROW Manuel does not mention the RPM is suspicious to me, it does smack of the legal dept. here in the the U.S. getting involved.

FWIW, I compromised and chose a break-in period between what AP suggested and the manual. No data to back up my decision but just something I was more comfortable with and in line with the way I've broken in many trouble free engines.

I read in a PCA article somewhere that there is an engineering basis for the 2K mile break in period, but I don't really know. I just think that an engine should have some kind of break in and AP's suggestion seems like a sensible way to go, at the very least.

I think the length of the break-in is more for the box than the engine. But I think all specialists agree that it's at least 50% too long. That's just Porsche playing safe. Therefore it surprises me that Porsche do not suggest an oil change in that period whereas most specialists do.