GT4RS Break-In Discussion
05-11-2023, 03:34 PM
#76
05-11-2023, 04:05 PM
#77
Power and torque are higher in the Rev range so until you push on it doesn’t feel as quick as a 991 gt3. Once above 6 onwards it goes bat**** and is every bit as quick.
05-11-2023, 04:40 PM
#78
I felt my 4RS was limiting the engine power and/or rev limit at 800 miles when it first went on track. Its now on 1060 miles with another track day next Thursday so I expect it to give me full beans.
05-11-2023, 08:04 PM
#79
yeah it is Taffy.. it’s called 7k rpm vs 9k!! It’s run in now so you can wind it out. Power delivery is different to the 3RS.
The following users liked this post:
TDT (05-12-2023)
06-07-2023, 05:59 AM
#81
Rennlist Member
I Believe only fail safe for run in/break in period of 1500km is the 7000rpm limiter that is in place until the engine is at operational temperature. (70c oil temp?)
Anyone stupid enough to attempt redline before at temperature? I am only at 385kms and have the ' observe run in procedure' in blue that comes up on the dash.
Anyone stupid enough to attempt redline before at temperature? I am only at 385kms and have the ' observe run in procedure' in blue that comes up on the dash.
06-10-2023, 06:15 PM
#83
If rings aren't seated by 200miles there's a problem. Waited til 250miles and occasionally rip on it and let the rpms wrap out. 1k miles break in on an NA motor is just dumb, but no break in on a 992 TTS? Doesn't make sense. With that said, as with any motor letting it correctly heat up and could down are really 2 of the biggest engine health factors.
06-10-2023, 07:12 PM
#85
Rennlist Member
one data point: my 4RS at the 'RIng this week started with less than 100km on it ... Manthey seem to have no issue running the cars at 100% from the get go
The following users liked this post:
sbsurfer (06-13-2023)
The following users liked this post:
Larry Cable (06-10-2023)
06-11-2023, 09:59 AM
#87
Rennlist Member
A reply from a Porsche Engineer explaining why they have a run in/break in period with restrictions.
"You do not understand. When we do our engine test, the metals inside the engine do not reach the temperature they would when driven on the street since the bench test session is very short. In other words, the bearings, pistons and cylinders never get a chance to thermally expand to their maximum. Therefore, there is very little wear on the moving components. But when you drive a car on the street, the engine parts expand considerably more because of the heat being generated from the engine running for an extended period of time. No matter how tight the tolerances are, there is always a slight amount of expansion in the material. The moving parts can wear quickly if exposed to excessive heat (maximum rpm) and not always in a uniform way. We are constantly varying the speed and allow the engine to run at both high and low rpm's"
"Porsche wants the engine to break-in slowly which means it needs to maintain lower operating temperature (below 4000rpm non RS and 7000rpm RS) and to allow all parts to adjust (wear-in) within their own thermal expansion parameters. This is also the reason Porsche wants the owner to vary the RPM throughout the break-in period: therefore the engine doesn't get use to one operating temperature range"
"....with Mobil 1 Oil and Porsche's own teats reveal that after 3000kms (non RS and 1500kms RS) been driven, all the moving parts have had a chance to wear into their adjacent surfaces and then an increase in engine RPM is permissible"
The engineer also commented that there were many other moving parts other than the engine that needed break-in as well. Wheel hubs and bearings, Rose joints, Tyres, brakes and transmission were just some of the other components.
It is also worth mentioning the reason for the Mobil 1 ESP X3 0w-40 oil. The petrol particulate filters that these engines all now have require very high operating temps, hence the 242C oil flash temp, to burn off the 'undesirables' from the filters. These engines run a lot hotter than previous versions. The break-in below 7000rpm is to reduce this very high temperature exposure.
Food for thought.
"You do not understand. When we do our engine test, the metals inside the engine do not reach the temperature they would when driven on the street since the bench test session is very short. In other words, the bearings, pistons and cylinders never get a chance to thermally expand to their maximum. Therefore, there is very little wear on the moving components. But when you drive a car on the street, the engine parts expand considerably more because of the heat being generated from the engine running for an extended period of time. No matter how tight the tolerances are, there is always a slight amount of expansion in the material. The moving parts can wear quickly if exposed to excessive heat (maximum rpm) and not always in a uniform way. We are constantly varying the speed and allow the engine to run at both high and low rpm's"
"Porsche wants the engine to break-in slowly which means it needs to maintain lower operating temperature (below 4000rpm non RS and 7000rpm RS) and to allow all parts to adjust (wear-in) within their own thermal expansion parameters. This is also the reason Porsche wants the owner to vary the RPM throughout the break-in period: therefore the engine doesn't get use to one operating temperature range"
"....with Mobil 1 Oil and Porsche's own teats reveal that after 3000kms (non RS and 1500kms RS) been driven, all the moving parts have had a chance to wear into their adjacent surfaces and then an increase in engine RPM is permissible"
The engineer also commented that there were many other moving parts other than the engine that needed break-in as well. Wheel hubs and bearings, Rose joints, Tyres, brakes and transmission were just some of the other components.
It is also worth mentioning the reason for the Mobil 1 ESP X3 0w-40 oil. The petrol particulate filters that these engines all now have require very high operating temps, hence the 242C oil flash temp, to burn off the 'undesirables' from the filters. These engines run a lot hotter than previous versions. The break-in below 7000rpm is to reduce this very high temperature exposure.
Food for thought.
The following 4 users liked this post by johnrichard:
06-11-2023, 01:27 PM
#88
A reply from a Porsche Engineer explaining why they have a run in/break in period with restrictions.
"You do not understand. When we do our engine test, the metals inside the engine do not reach the temperature they would when driven on the street since the bench test session is very short. In other words, the bearings, pistons and cylinders never get a chance to thermally expand to their maximum. Therefore, there is very little wear on the moving components. But when you drive a car on the street, the engine parts expand considerably more because of the heat being generated from the engine running for an extended period of time. No matter how tight the tolerances are, there is always a slight amount of expansion in the material. The moving parts can wear quickly if exposed to excessive heat (maximum rpm) and not always in a uniform way. We are constantly varying the speed and allow the engine to run at both high and low rpm's"
"Porsche wants the engine to break-in slowly which means it needs to maintain lower operating temperature (below 4000rpm non RS and 7000rpm RS) and to allow all parts to adjust (wear-in) within their own thermal expansion parameters. This is also the reason Porsche wants the owner to vary the RPM throughout the break-in period: therefore the engine doesn't get use to one operating temperature range"
"....with Mobil 1 Oil and Porsche's own teats reveal that after 3000kms (non RS and 1500kms RS) been driven, all the moving parts have had a chance to wear into their adjacent surfaces and then an increase in engine RPM is permissible"
The engineer also commented that there were many other moving parts other than the engine that needed break-in as well. Wheel hubs and bearings, Rose joints, Tyres, brakes and transmission were just some of the other components.
It is also worth mentioning the reason for the Mobil 1 ESP X3 0w-40 oil. The petrol particulate filters that these engines all now have require very high operating temps, hence the 242C oil flash temp, to burn off the 'undesirables' from the filters. These engines run a lot hotter than previous versions. The break-in below 7000rpm is to reduce this very high temperature exposure.
Food for thought.
"You do not understand. When we do our engine test, the metals inside the engine do not reach the temperature they would when driven on the street since the bench test session is very short. In other words, the bearings, pistons and cylinders never get a chance to thermally expand to their maximum. Therefore, there is very little wear on the moving components. But when you drive a car on the street, the engine parts expand considerably more because of the heat being generated from the engine running for an extended period of time. No matter how tight the tolerances are, there is always a slight amount of expansion in the material. The moving parts can wear quickly if exposed to excessive heat (maximum rpm) and not always in a uniform way. We are constantly varying the speed and allow the engine to run at both high and low rpm's"
"Porsche wants the engine to break-in slowly which means it needs to maintain lower operating temperature (below 4000rpm non RS and 7000rpm RS) and to allow all parts to adjust (wear-in) within their own thermal expansion parameters. This is also the reason Porsche wants the owner to vary the RPM throughout the break-in period: therefore the engine doesn't get use to one operating temperature range"
"....with Mobil 1 Oil and Porsche's own teats reveal that after 3000kms (non RS and 1500kms RS) been driven, all the moving parts have had a chance to wear into their adjacent surfaces and then an increase in engine RPM is permissible"
The engineer also commented that there were many other moving parts other than the engine that needed break-in as well. Wheel hubs and bearings, Rose joints, Tyres, brakes and transmission were just some of the other components.
It is also worth mentioning the reason for the Mobil 1 ESP X3 0w-40 oil. The petrol particulate filters that these engines all now have require very high operating temps, hence the 242C oil flash temp, to burn off the 'undesirables' from the filters. These engines run a lot hotter than previous versions. The break-in below 7000rpm is to reduce this very high temperature exposure.
Food for thought.
On the motor stand point with regards to heat cycles.... that's an engine operating hours metrics and not miles so not really understanding of how they come to their 1500KM metrics.
06-12-2023, 11:34 AM
#89
RL Community Team
Rennlist Member
Rennlist Member
Thats all cool and I respect it. I can attest to other parts on Porsche's needing to be broken in. Case and point I was told to test drive a Cayanne Turbo which had the PCCBs. Well during my test drive I noticed high levels of brake fade and rotor smell. Got back to the service bay and made the whole area permeate of burning rotor smell. They all thought something was wrong including myself til the main service manager came and said "oh yeah this is normal and they actually have a 500 mile break-in period for the rotors to seat"..... I told the dude that would've been great to know prior to potentially killing ourselves.
06-29-2023, 02:00 AM
#90
Another data point...
I spent the last two days at the Porsche Experience Center in LA and did the 90 min GT4RS experience and today did the 4 hour GT4RS Accelerated experience. The car had 400 miles on it and I beat the crap out of it for hours and hours.
I spent the last two days at the Porsche Experience Center in LA and did the 90 min GT4RS experience and today did the 4 hour GT4RS Accelerated experience. The car had 400 miles on it and I beat the crap out of it for hours and hours.
The following users liked this post:
SLATETT (06-29-2023)