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This is what I will follow for my upcoming 4RS break-in. This is as per AP's basic principles of bringing a motor up to speed.
The only think I might modify and staying closer to what my mechanic friend said would be to start off that list at 4000 RMP and then up it 500 RPM at each mileage point.
Your opinion but my mechanic, born and raised in Stuttgart, and has worked on factory racing teams is hard to dispute given his vast knowledge. We each have our own credentials, right roofer.
I've built 2k hp+ drag diesels that run 80+ pounds of boost. I may know a thing or 3 about building an engine.
Anyone that knows a lick about how a motor breaks in knows if its build correctly after about 250 miles and multiple heat cycles the rings are seated and wear materials are in done.
There is 100% no reason a motor especially a performance motor thats tested and ran during the assembly process at the factory would need such a lengthy break in process.
Folks need to understand miles aren't what breaking a motor, it's heat cycles. Multiple rounds of heat cycles at that.
Prior to me even taking delivery I ran my GT4RS to 9k RPM and 22 miles was on the OD. It's now at 1053. Last run I did was up to 178mph(which frankly in this car is sketchy). Runs like a top and Ill stand by what I say.
I did the same thing with the 992 Turbo S I have. Take it easy for about 200miles, then give it hell. 8100miles on it and Multiple 200mph+ runs, numerous launches, and many more to go.
Last edited by Justaroofer; 08-13-2023 at 09:49 AM.
If it was that important they would have baked it into the computers software like Chevy did with the new Corvette, very easy to do with todays tech. The fact that it is not says a lot.
Yep. So many Porsche car owners are so clueless with what is actually going on with a break in that they need to be spoon feed some BS schedule to follow. Then, these owners think the engine (designed to rev to 9500+) will break if the go over 4k rpms too soon. lol. They even think it could void their warranty.
Also, no way in hell AP follows that break in cycle. He probably doesn’t ever even put 1000 miles on any car before he switches out to a different model from the pool of cars he has access to.
Your opinion but my mechanic, born and raised in Stuttgart, and has worked on factory racing teams is hard to dispute given his vast knowledge. We each have our own credentials, right roofer.
How does being born and raised in a particular city make one mechanic “friend” more credentialed? Dang the German kool-aid must be intense over there. Lol
If it was that important they would have baked it into the computers software like Chevy did with the new Corvette, very easy to do with todays tech. The fact that it is not says a lot.
Originally Posted by raymort
Yep. So many Porsche car owners are so clueless with what is actually going on with a break in that they need to be spoon feed some BS schedule to follow. Then, these owners think the engine (designed to rev to 9500+) will break if the go over 4k rpms too soon. lol. They even think it could void their warranty.
Also, no way in hell AP follows that break in cycle. He probably doesn’t ever even put 1000 miles on any car before he switches out to a different model from the pool of cars he has access to.
Exactly.
If there was a real break in cycle there would be a post break in oil change required. Even Hellcats and M cars are required this service post actual break in or boom... by warranty.
I had a hellcat motor grenade on itself under factory power at 10k..... FCA replaced the whole thing as it was a known issue which they wouldn't disclose and it was rare..... only a 35k warranty loss lol.
A famous Mezger 911 engine builder would tell his clients to go to an Autox for break in. My philosophy is don't lug the engine, dont do long pulls under full throttle and lots a deceleration engine braking. My credentials are Boomer, ex Farmer and Pundit.
There are of course many ways to do this. I agree that after 200-300 miles of properly driving the car at various revs that the rings are pretty well sealed after multiple heat cycles. Not just one long drive on the freeway. After that, have at it if that is your style, or be a little more conservative with a break in schedule. I am not saying that I won't have a couple runs into the upper rev range a bit early when the motor is fully warmed up. But, personally am not going to the track in 100+ degree Texas weather and banging off 9k shifts all day long till I get about 1000 miles on the car and some fresh oil in it.
Of course the car will be fine no matter what you do, especially if you only own for a few years and then flip it. For what could be a forever car though, I plan to take the advice of the person who has created every recent GT car since the original GT3 over 20 years ago.
Errors in GT4RS Owner's Manual - Running in the vehicle
Apologies in advance if this was posted elsewhere, just received this email from Porsche WRT errors in the run-in section of the owner's manual:"Porsche Cars North America, Inc. (PCNA) would like to notify you of two incorrect figures in the “Running in the vehicle” section on page 17 of your Owner’s Manual.
What is the issue?
On page 17 of your Cayman GT4RS Owner’s Manual, in the section “Running in the vehicle”, the following is stated:
The moving parts of a new vehicle must be run in. The parts require the first 1,875 miles (3,000 km) for this purpose. The oil and fuel consumption may be somewhat higher than normal during this period.
However, the correct figure for run-in mileage is 930 miles (1,500 km).
Also stated in the same section:
Avoid high engine speeds of 4,000 rpm or more. Drive at low engine speeds when the engine is cold.
However, the correct figure for safe engine speed is under 7,000 rpm.
Cheers.
Important Information on Errors in the Owner’s Manual for your Cayman GT4RS
Just received an email from Porsche:
This notice applies to your vehicle: WP0AE2A83PSxxxxxx
Dear Mr. X
Porsche Cars North America, Inc. (PCNA) would like to notify you of two incorrect figures in the “Running in the vehicle” section on page 17 of your Owner’s Manual.
What is the issue?
On page 17 of your Cayman GT4RS Owner’s Manual, in the section “Running in the vehicle”, the following is stated: The moving parts of a new vehicle must be run in. The parts require the first 1,875 miles (3,000 km) for this purpose. The oil and fuel consumption may be somewhat higher than normal during this period.
However, the correct figure for run-in mileage is 930 miles (1,500 km).
Also stated in the same section: Avoid high engine speeds of 4,000 rpm or more. Drive at low engine speeds when the engine is cold.
However, the correct figure for safe engine speed is under 7,000 rpm. As always, if you have questions, please contact your local Porsche Center.
This notice applies to your vehicle: WP0AE2A83PSxxxxxx
Dear Mr. X
Porsche Cars North America, Inc. (PCNA) would like to notify you of two incorrect figures in the “Running in the vehicle” section on page 17 of your Owner’s Manual.
What is the issue?
On page 17 of your Cayman GT4RS Owner’s Manual, in the section “Running in the vehicle”, the following is stated: The moving parts of a new vehicle must be run in. The parts require the first 1,875 miles (3,000 km) for this purpose. The oil and fuel consumption may be somewhat higher than normal during this period.
However, the correct figure for run-in mileage is 930 miles (1,500 km).
Also stated in the same section: Avoid high engine speeds of 4,000 rpm or more. Drive at low engine speeds when the engine is cold.
However, the correct figure for safe engine speed is under 7,000 rpm. As always, if you have questions, please contact your local Porsche Center.
I was just about to post the same email! You beat me to it I hope this puts to rest the back-and-forth and speculation re delta between NA and ROW recommendations on break-in.
Just got this too. So funny. I followed the euro break in process from the UK manual which is what this is. Glad I didn’t go the blue ***** method recommended in the original manual.
08-13-2023, 09:38 AM
I hope this puts to rest the back-and-forth and speculation re delta between NA and ROW recommendations on break-in.
