Your thoughts on Break In Period for GT3's
09-18-2017, 12:53 PM
#121
Instructor
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Our dealer brings cars to track events for potential customers with zero mileage and they get thrashed. No issues with any of them many miles later according to them.
Two friends and I all bought our GT4s at the same time, and after a couple of months we took them to the dyno. Two of us who did a relatively short break-in period and had done a few track days made more power than the one that was broken in over a longer period and had less track time.
For my .2 GT3, I took it to 5k RPM max up to 500kms and then took it all the way up to 9k.
Two friends and I all bought our GT4s at the same time, and after a couple of months we took them to the dyno. Two of us who did a relatively short break-in period and had done a few track days made more power than the one that was broken in over a longer period and had less track time.
For my .2 GT3, I took it to 5k RPM max up to 500kms and then took it all the way up to 9k.
09-18-2017, 02:05 PM
#123
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AP (or someone else from Porsche - my memory is fuzzy) mentioned that bench test does not get all components to maximum temps because of its short duration, so break in is still relevant. But it does prove that taking a new engine to high RPM briefly should not damage it, I think.
09-18-2017, 02:29 PM
#124
Burning Brakes
Lugging your engine used to be bad back in the day before there was great computer control of the fueling and ignition of the motor. High load, low RPM are the perfect conditions for creating detonation or "knock" as it is commonly called. Before computer control, and even early on before there was excellent knock control, this scenario was to be avoided as it was easy to cause the engine to detonate substantially in this load and rpm window.
Modern engine management systems are load mapped into ranges that you will literally never see on the street. The ECU knock and timing strategies are also extremely sensitive and precise. The ECU is actually programmed to ride the edge of pre-ignition as this is the most efficient; they've gotten so good with the knock sensors and algorithms that they can actually tell from the noise (knock sensors are piezo microphones) when slight combustion instability is occurring which the precursor to full on detonation and adjust in real time.
In short, in a modern car, "lugging" the engine does absolutely nothing detrimental to it.
Modern engine management systems are load mapped into ranges that you will literally never see on the street. The ECU knock and timing strategies are also extremely sensitive and precise. The ECU is actually programmed to ride the edge of pre-ignition as this is the most efficient; they've gotten so good with the knock sensors and algorithms that they can actually tell from the noise (knock sensors are piezo microphones) when slight combustion instability is occurring which the precursor to full on detonation and adjust in real time.
In short, in a modern car, "lugging" the engine does absolutely nothing detrimental to it.
09-20-2017, 04:59 PM
#125
Rennlist Member
AP (or someone else from Porsche - my memory is fuzzy) mentioned that bench test does not get all components to maximum temps because of its short duration, so break in is still relevant. But it does prove that taking a new engine to high RPM briefly should not damage it, I think.
09-20-2017, 05:03 PM
#126
Race Director
Our dealer brings cars to track events for potential customers with zero mileage and they get thrashed. No issues with any of them many miles later according to them.
Two friends and I all bought our GT4s at the same time, and after a couple of months we took them to the dyno. Two of us who did a relatively short break-in period and had done a few track days made more power than the one that was broken in over a longer period and had less track time.
For my .2 GT3, I took it to 5k RPM max up to 500kms and then took it all the way up to 9k.
Two friends and I all bought our GT4s at the same time, and after a couple of months we took them to the dyno. Two of us who did a relatively short break-in period and had done a few track days made more power than the one that was broken in over a longer period and had less track time.
For my .2 GT3, I took it to 5k RPM max up to 500kms and then took it all the way up to 9k.
09-21-2017, 08:35 AM
#129
Drifting
Prejudice much?.. Unless your Italian, You should be much more careful with your witless (derogatory) comments.. Some Italians may not appreciate your words, regardless of how infantile they may be...
09-21-2017, 12:30 PM
#130
Banned
And I don't give one soggy cannolo that someone uses the word "Italian tune up" Lighten up!
09-21-2017, 02:17 PM
#131
Race Director
Originally Posted by RealityGT
Prejudice much?.. Unless your Italian, You should be much more careful with your witless (derogatory) comments.. Some Italians may not appreciate your words, regardless of how infantile they may be...
Catorce, Wei ciao bello, di dove sei?
09-21-2017, 02:26 PM
#132
Drifting
^haha.. love that you used the "eh". 
09-21-2017, 02:29 PM
#134
Drifting
I'm 100% no mix Italian, I spoke Italian before I spoke English, and when they did our family geneaology they found we were 100% Italian since as far back as they had records, the late 1600s.
And I don't give one soggy cannolo that someone uses the word "Italian tune up" Lighten up!
And I don't give one soggy cannolo that someone uses the word "Italian tune up" Lighten up!
09-21-2017, 03:16 PM
#135
Most of you guys won't even keep the GT3 past warranty, so why would you worry about break-in? Look at the used GT3 market, most of them have less than 10k miles on them.
I plan to daily my GT3 so I'll drive gently (vary speed) until the first oil change at 1,500mi. It's not about breaking-in the engine, the clutch packs (DCT or Manual) and gears need time to wear in properly. Same goes with brakes, they take time to bed.
I plan to daily my GT3 so I'll drive gently (vary speed) until the first oil change at 1,500mi. It's not about breaking-in the engine, the clutch packs (DCT or Manual) and gears need time to wear in properly. Same goes with brakes, they take time to bed.