If a flash back to stock doesn't allow you to pass a state smog test then that could have huge implications on the used car market. Imagine that you purchase a car that someone previously tuned but returned to stock before selling it. There is no way for MOST non OEM dealers(or individual buyers) to be able to verify that the car hasn't been previously tuned.

 

It also just really depends on where you live, and what mandated emissions tests you may or may not have. We got lucky with 992.1, but the changes over to 992.2 make this all the more difficult. Believe me, I also wish it was a simple OBD flash with M-Tuner just like 992.1.

-Charles@M

 

In respects to warranty, if I blow an engine it's basically a guarantee that porsche will know this was tuned regardless of 992.1 or 992.2 correct?

 

If you flash back to stock on a 992.1 with M-Tuner, it flashes on a byte for byte stock file with a verified CVN and CALID. I have not heard of someone having an issue after going back to stock and then visiting the dealer for service or warranty work.

-Charles@M

 

This topic has always been of interest to me and has been well debated many times over here. The bottom line is that if you tune you, may be at risk for warranty coverage denial. None of the tuners can or will. give an iron-clad guarantee on paper and there is still debate as to whether the stock re-flash is really detectable or not.

After all said debate including my probing questions to tuners my take-aways are first, the chances of encountering any problem with a tuner are exceedingly low (but not zero). Second, there really are no guarantees. Some will point to dealers that actually do the flashes as evidence of complicity with tuning, but they are profit centers and in the end only collect evidence for a warranty submission, not adjudicate them. My personal take-away is if you are risk tolerant, tune it and never look back - you'll most likely be fine. If you are a person that plans for the worst to feel comfortable, then wait for the factory warranty to expire and then tune. I was born in the second camp, so my tune will need to wait it's turn.

No doubt others have strong opinions to the contrary.

 

with the 991.1 I get it's easy to "revert" but the .2 seems to need to ship the ecu to the tuner that gets "unlocked".

Once that happens, no matter what porsche knows it's been modified

Not putting into question how safe it is etc!

 

Not really. Eventually there is likely to be solutions built on additional ECUs.
So you keep the original ECU intact, clone a new ECU and code the new ECU. Swap for the original when going to the dealers…

Not saying that this is 100% fool proof (nothin is !), but this is what is being done for tuning the Taycans at the moment - my guess is that once 992.2 ECUs are available, something like this will make its way onto the market…

 

It is not currently possible to clone the H80 ECU's, they have to be coded with all the modules together and match processor ID's exactly.

-Charles@M

 

Thanks Charlse for all the needed info.

Quick question....

There is some discussion on another posting regarding the different HP numbers for a stage 1 -992.1 S vs a stage 1 -992.2 T .

Are the .2 992 models using the same Turbo as the .1 S/GTS?

Looks like the .2 T makes more stage 1 HP than a .1 S with the same tune.

Why the difference?

 

They make essentially the exact same power. The tables in the ECU vary a little bit, but any variations in our calibration dyno plots is mostly going to be from cars being tuned on different days, with different DA's/temps/pressures/dyno loading/manual vs. pdk etc. There are a lot of variables, and even with correction factors it'll never be true 1:1 for comparison in most cases.

-Charles@M

 

Thanks Charles.

Can you elaborate on the .2 Base/ T/ S Turbos....Porsche sales documents state "Porsche fitted new turbochargers and has extensively optimized the charge-air cooling".

Is this accurate or are the .2 turbos just the same .1 GTS turbos?

 

So, @M Engineering , question for a friend: How would one go about purchasing a second 992.2 T ECU and get it programmed to the car and get it tuned? To be able to hardware switch between tuned and non-tuned ECU depending on the need. Hypothetical, of course.

 

It is not currently possible to clone the H80 ECU's, they have to be coded with all the modules together and match processor ID's exactly.

-Charles@M

 

I think the answer is in Charle's post #188

 

I think the context of that post is different. Of course, Porsche can supply a replacement ECU and program it to your car, even for a 992.2. Question is how and if they protect it such that the old ECU suddenly becomes worthless and cannot be put back into the car.