AndrewSS

Hey guys, my dads GT3 has only 520 miles on it now (4/9/07), he is registered for an autocross on April 14th.

It really should be broken in by the event, it would be a bummer to have to shift at about 5,000rpm

Anyway, have any of you guys just disregarded the 2,000 mile break in?

What would you suggest as the minimum, I think 850 - 900 miles are very possible before the autocross on saturday. So, the engine would be at almost 1/2 of the Porsche recommended break in.


What do you guys think? Take it to the autocross with 850-900mi and drive it like it is supposed to be driven? OR take it to the event and shift at 5k rpm

Just curious what you guys would do!

-Andrew

GT3 Nut

Just go and have fun. I had my 996 GT3 on the track doing redline shifts at 70 miles on the odometer. No worries. Enjoy it. Besides an autocross is not very hard on the car.

turbo187

https://rennlist.com/forums/poll.php...ts&pollid=1926

SrfCity

Big debate over this. I say go for it after a few hundred. Apparently these engines are bench tested at the factory for 5 minutes full throttle. Besides, you've got a 4 year warranty on it and unless you're doing some crazy redline down shifts, you're covered.

mooty

in the last 10 years i had quite a few p cars, some less steller than GT3's. i never broke them in by book. after 500 miles, i like to test if the rev limiter is working on a daily basis and then go on track. none of them had any problems. granted, i didn't keep the cars very long time wise, i put huge mileage on them. two of them got to 50k miles in 18 months. at least at 50k miles, i saw no ill effects and i plan to do the same for all other future cars. YMMV.

mitch236

"drive it like you stole it" applies here. The only caveat is that if you hit the rev limiter, you will void the engine warrantee.

GoFastKindaGuy

The golden rule here is warm it up good before you hammer. If all the fluids are warm, you will do no harm. It only takes a few hours to knock off any high spots which remain after precision machining and careful assembly. Porsche does that before it ships a car. While I still follow the old advise to vary engine speeds during the first thousand miles or so, but I doubt it matters.

frayed

What makes you say that, and say so so definitively?

The ecu records overrevs by class. Hitting the rev limiter is one class. . . the higher classes of overrevs have different codes depending on severity.

I've heard of people having warranty coverage denied for *mechanical* overrev (misshift), but not for tagging the rev limiter.

Also, I could be wrong on this, but to the best of my knowledge the ecu does not record overrev occurences with mileage (though it might with time on motor)?

Anyway, I'd like to hear of any warranty coverage denials based on tagging the rev limiter w/i break in. My guess is if such a thing did happen, there were other circumstances leading to denial of coverage, like a mechanical overrev later in life (I read about one such occurence).

Definitely agree with this.

mitch236

Maybe I should restate what I said. What I meant to say was, don't hit the rev limiter during the recommended break in period which I was told by my dealer's cheif mechanic, would void my engine warrantee. Over-revs, no matter when they occur can void the warrantee.

Sorry about the confusion.

frayed

OK. I plan to stay 1k below the rev limiter just to avoid nasty codes to be saved by the computer and avoid having to deal with this issue.

gweedo911

Dead horse!

BobbyC

FWIW...and probably not much...I followed the book for 2000 miles. However, after the first 1000 miles I frequently shifted gears ~ 5k rpms.

I don't get the "drive it like you stole it...hit the redline straight outta the showroom" approach. Bravado for sure, brains not so sure! What's the hurry? Enjoy the ride. It's your car, your money so you decide. Wanna follow the Porsche guide or the infinite wisdom of these forums?

One thing I will tell ya, the ECU reads at your dealer will be downloaded to PCNAs blackboxes...so they know how u drive and what you've done. If it does come to crunch, at some future date, break-in violations WILL void your warranty!

Good luck and cheers!

frayed

Here's a link to Excellence's (Bruce Anderson) view on the subject. It basically says that the 2000 mile suggestion was made to prevent whining to the dealers of excessive oil consumption during break in, and that 300-500 gentle miles followed by aggressive driving speeds up break in with no ill effects.

I removed the attachment as requested by Pete Stout of Excellence.

http://www.rennteam.com/showflat.php...=&fpart=1&vc=1

icon

not possible!
the dealer or porsche may use a specific instance to turn down a specific claim but void the vehicles entire warranty . . . no way!
plus dealers have a lot of leeway w/ warranty claims.

stout

Thanks, and sorry to be a pain on the subject. It's not something I enjoy doing at all...

pete