DIY Carrera T turbo R&R
#46
Racer
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#47
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#48
#49
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Your right, It will not run optimally. Although I do not have a stock tune, I have Cobb stage 2 and a pro tune on top of that. I will be doing some cautious street data logging for my Pro Tuners to look at. They will make changes as necessary and send them back to me and I will load them into the ECU. After they think the data looks good we will be doing some dyno runs.
#50
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Wouldn't make any sense, once power is removed from the DME, the adaption disappears. If the tuner is competent, they can take the pressure map of the turbo's into account and make a initial test tune that will be really close. From there is it a game of what adaptations they can make to the tune based upon data logs. It is important to note that any logs that are retrieved from the DME are going to reflect the resolution of the minimal amount sensors the 9A2B6 has.
#51
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Good point after the reflash erasing the fuel trims. The on-vehicle sensors are good enough for tuning if doing a conservative tune. Not like the older cars with narrow band O2. Modern O2 widebands and the 991.2 even has individual cylinder knock detection.
#52
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#53
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I look forward to the data once released.
#54
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It will be interesting to see. Preliminary date shows that the GTS compressor and turbine is capable of producing great power. From what I understand, once you free up the air intake restriction, the operating environment for the turbos is greatly improved. On other models that have been tuned by APR (Audi 2.5T, Audi 3.0T, Audi 4.0TT) improving the air inlets has led to much greater increases than a tune with the OEM counterparts.
I look forward to the data once released.
I look forward to the data once released.
#55
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it's significant added cost for a benefit the vast majority of customers wouldn't notice. There is the cost of doing the coating plus the cost of shipping the turbine housing twice, to coating supplier and back. Porsche is a mass production company, so the bean counters are very active.
who are the vast majority of porsche customers?
Enthusiasts, purists, drivers, likely the minority and most sell to professionals that want a status symbol and will never work on the car, don't even know where the turbos are located - actually they don't even know the difference between NA and Turbo motors.
#57
#58
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Mark, thanks so much for taking the time for the photos and write up. This maybe a bit off topic, but in doing all this work could you determine if the Turbos need to be removed in order to replace the spark plugs? The thread discussing this topic left the impression that the turbos prevent access to the coils and plugs.
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Carlo_Carrera (03-26-2020)
#60
Racer
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Mark, thanks so much for taking the time for the photos and write up. This maybe a bit off topic, but in doing all this work could you determine if the Turbos need to be removed in order to replace the spark plugs? The thread discussing this topic left the impression that the turbos prevent access to the coils and plugs.
I might have spoken to soon.