ryan_s1983

Looking for a tune for my 2021 Cayanne S. I tuned my 2022 911 C2S with m-engineering and have been very pleased. It was great gains and I went with a more conservative tune for my 911.

M-engineering will tune the 2021 Cayanne S, but both them and FABSPEED want you to send in your ECU… which becomes a massive pain if/when I need to take it back to the dealership for service in the future and need to flash back to stock.

Anyone here using a tune on their Cayanne? Run into this issue? What’s the best option out there?

Schnave

APR offers a flash through the OBD2 port. Individual installers available nationwide.
From this thread:
https://rennlist.com/forums/cayenne-...-upgrades.html

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http://goapr.io/9y29

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ryan_s1983

Any idea how reliable these tunes are for a daily driver over an extended period of time?

INS4NE_B9

APR has a phenomenal reputation. No worries there.

pbon

Why bother flashing back to stock when Porsche will know that it was flashed? A piggyback will leave less of a trail but if there is a major warranty claim that Porsche investigates, it can find evidence in the ECU that the engine has been operating at limits outside those allowed by the stock tune.

I installed a JB4. About to uninstall it for 2 year service.

icemang

Are you sure that Porsche will know if the car gets flashed and flashed back?

ryan_s1983

@Arin@APR I called APR today and they said my year model (2021), after march of that years production, the ECU was locked differently and, If my ECU is one of the newer models (which I think it is), then y’all do not have an easy tune for my car…

does that sound correct?

icemang

I've heard the same thing, they can tell you whether they can tune your car by your VIN I believe. I imagine they'll find a workaround eventually.

edit: typo fix

pbon

Yes. The “flash back to stock” trick might have worked 10 years ago.

mcacs1

You should change the numbers in the table to show the delta values between normal and tune dyno results.

dg108

Delete, somehow got in the wrong forum.

metelhead

Can someone please explain the difference between ECU and OBDII port tune (outside of the actual hardware side of it). Tunes like APR offers I've heard just tricks the ECU, while the ECU tune is programed. I guess I'm just at odds with the process. Seems like you both end up at the same point, correct? Why do one over the other?

My mechanic highly suggests ECU over the OBD style, saying that you have more control on what is being tuned and getting the correct readings air/fuel or shift points etc...

OBD tune; easier to add or subtract, cheaper
ECU tune; more exact, and more variables to tune with, or customize

I'm out of Porsche warranty, but do have aftermarket service warranty. Do either of these effect that (I know I need to read the fine print again!)

Schnave

I think you may be confusing a piggyback tune with the ECU tune via OBD2 port.

A piggyback, such as the JB4 Plug and Play, intercepts and modifies various sensor signals to the ECU. As you said, it tricks the ECU into thinking the values are not optimal and then causes it to produce more boost or inject more fuel - thus giving more power. The ECU is not modified in any way; it retains the original factory tune.

An ECU tune, or flash tune, modifies the factory computer programming to produce more power. It alters many more parameters than a piggyback tune. The program can be installed most easily via the OBD2 port. Another way to flash the ECU is to remove it from the vehicle and send it to the tuner for modification. The end result is the same; A generic “Stage 1” tune for that specific model that gives moderate performance gains using the stock factory engine.

If you want to add larger turbos, injectors, etc, you’ll need a custom “dyno tune”. This is a customized tune for your specific vehicle modifications and tailored to your preferences and tolerance for risk.

metelhead

Yes thank you for the clarification! I was thinking the OBD tune as a piggyback.