Break In Recommendations for GT4
03-03-2020 | 07:46 PM
#31
Intermediate
Joined: Dec 2019
Posts: 42
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From: Noord Brabant
My Porsche dealer told me to take it easy for 800km then floor it.
I've followed another break in schedule: below 4krpm until 800km, after that I increased revs with 1krpm every 500km.
Brgds
Mark
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Westcoast (03-03-2020)
03-03-2020 | 08:14 PM
#32
RL Community Team
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From: Victoria, BC, Canada
Oh, another question, your Spyder VIN, a K for Osnabruck or a S for Stuttgart build?
03-03-2020 | 10:55 PM
#33
Three Wheelin'
Joined: Mar 2017
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From: Dallas
That’s basically what AP says. Broken by 2300 km gradually. It may be 500 rpm every 400-500 km but similar philosophy.
03-04-2020 | 02:27 AM
#34
Racer
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03-04-2020 | 03:15 AM
#35
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Follow the Porsche recommended break-in procedure at your own risk.
Remember, the OEM warranty is not only time factored, but mileage factored. And, yes, the break-in period eats into that mileage allowance in the OEM warranty.
Remember, the OEM warranty is not only time factored, but mileage factored. And, yes, the break-in period eats into that mileage allowance in the OEM warranty.
03-04-2020 | 04:10 AM
#36
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From: EU
Ideally there would be an algorithm running in the ECU and it would tell you when it thinks break-in is done. In absence of that manufacturers give you recommended distances but distance is a nearly useless measure as it can be completed in many different ways and time periods. If you jump into the car and start doing long distance driving at high average speeds you can get there in no time. But the engine will have done far fewer total revolutions and cycles in that scenario as it would have done if it was driven slowly through towns and cities and small roads generally. It could take weeks or months to complete the distance - or a mere two days. A lot more break-in happens one way vs the other.
Porsche's recommendations probably go more towards assuming the worst case scenario.
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PierreTT (03-04-2020)
03-04-2020 | 12:37 PM
#37
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From: Putnam County, NY
Always an entertaining discussion... When I learned that the 981 GT4 manual had different recommendations depending on delivery country, I knew it was motivated by lawyers, not engineers. I am guessing AP knows what he is talking about. YMMV...
https://rennlist.com/forums/gt4/9022...the-rules.html
I videoed AP's presentation, and here is what he said:
“I can only tell you how I personally do it, or how we do it at Weissach – for the first 500 kilometres or 300 miles, we don’t drive that car car ever over 5000 rpm, never. From then on, every 200 kilometres, we up the rpms by 500, so we end up at 1300, 1400 kilometres at the threshold before we can really go full throttle, at 800 or 900 miles”
He then went on that this procedure was really important for the GT3 RS engines given their more "delicate" rings - and how important this break in really is for any of their engines.
Another point - he recommended to realign the car after 1000-1500 miles due to settling - especially since the tires are getting bigger and bigger, and more sensitive to changes. The RS apparently is really sensitive around this.
You figure the head of the GT program would give you the straight goods.
Cheers,
Mike
“I can only tell you how I personally do it, or how we do it at Weissach – for the first 500 kilometres or 300 miles, we don’t drive that car car ever over 5000 rpm, never. From then on, every 200 kilometres, we up the rpms by 500, so we end up at 1300, 1400 kilometres at the threshold before we can really go full throttle, at 800 or 900 miles”
He then went on that this procedure was really important for the GT3 RS engines given their more "delicate" rings - and how important this break in really is for any of their engines.
Another point - he recommended to realign the car after 1000-1500 miles due to settling - especially since the tires are getting bigger and bigger, and more sensitive to changes. The RS apparently is really sensitive around this.
You figure the head of the GT program would give you the straight goods.
Cheers,
Mike
03-04-2020 | 12:37 PM
#38
Burning Brakes
Joined: Jun 2005
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That's the risk here.
Having said that, my car had 241 demo miles on it. I drove it like a race car from Day 1, because I guessed the demo miles weren't gentle. Never had a problem.
03-04-2020 | 02:48 PM
#39
Racer
Joined: Jul 2019
Posts: 254
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“I can only tell you how I personally do it, or how we do it at Weissach – for the first 500 kilometres or 300 miles, we don’t drive that car car ever over 5000 rpm, never. From then on, every 200 kilometres, we up the rpms by 500, so we end up at 1300, 1400 kilometres at the threshold before we can really go full throttle, at 800 or 900 miles”
The math does not exactly compute. His explanation should give:
500km / 5000rpm
700km / 5500rpm
900km / 6000rpm
1100km / 6500rpm
1300km / 7000rpm
1500km / 7500rpm
1700km / 8000rpm
not 1300/1400km.
The math does not exactly compute. His explanation should give:
500km / 5000rpm
700km / 5500rpm
900km / 6000rpm
1100km / 6500rpm
1300km / 7000rpm
1500km / 7500rpm
1700km / 8000rpm
not 1300/1400km.
03-04-2020 | 02:53 PM
#40
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“I can only tell you how I personally do it, or how we do it at Weissach – for the first 500 kilometres or 300 miles, we don’t drive that car car ever over 5000 rpm, never. From then on, every 200 kilometres, we up the rpms by 500, so we end up at 1300, 1400 kilometres at the threshold before we can really go full throttle, at 800 or 900 miles”
The math does not exactly compute. His explanation should give:
500km / 5000rpm
700km / 5500rpm
900km / 6000rpm
1100km / 6500rpm
1300km / 7000rpm
1500km / 7500rpm
1700km / 8000rpm
not 1300/1400km.
The math does not exactly compute. His explanation should give:
500km / 5000rpm
700km / 5500rpm
900km / 6000rpm
1100km / 6500rpm
1300km / 7000rpm
1500km / 7500rpm
1700km / 8000rpm
not 1300/1400km.
This still doesn't sound so bad, almost 1/2 the distance that seem to be the 'official' recommendation of 2500-3000km.
03-04-2020 | 04:14 PM
#41
Rennlist Member
Joined: Feb 2015
Posts: 1,104
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From: Putnam County, NY
Or he is saying after about 7k RPM just let her rip. FWIW, I slowly increased max RPM's up to about 1000 miles before I accelerated fully to redline. But three is no way I would bother to keep it under 4k up until that point. That is ridiculous, is not supported with any technical evidence, and could take a while to achieve in a weekend toy. Also, Porsche has no way of finding out how a car was broken in unless you bang on the rev limiter and trigger some Level 1 over-revs. Just hitting the redline does not even generate these. Everyone should do what makes them feel comfortable with their expensive purchase but the user manual recommendation is completely overkill IMHO. These cars are meant to be driven hard.
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03-04-2020 | 05:18 PM
#42
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It is comments like this that incent me to buying a car new, I don't want to pick up the pieces because the previous owner figured that his engineering knowledge exceeded that of the manufacturer...
03-05-2020 | 06:22 PM
#43
Race Director
Joined: May 2015
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To each his own, but it's laughable to think the motor's gonna be fuxored just because you exceed 4,000 rpms.
03-06-2020 | 09:43 AM
#45
Racer
Joined: Mar 2008
Posts: 465
Likes: 209
From: Reno, NV (USA)
Porsche knows a lot about building engines... and also a lot about litigation. As this is somewhat related to my professional life, I can promise you that the break-in instructions from most manufacturers are heavily influenced by the corporate legal team.