I believe he is referring to a 718 GT4. The 718 GTS is detuned from the 718 GT4, just like the 981 GT4 was detuned from the 991. Not surprising a 981 GT4 or 718 GTS would benefit from a Tune.

 

I believe Porsche purposely handicapped the 981 GT4 and put limits on the OEM ECU tuning. Even on a stock car there were like 15 hp just setting there to be had without much effort to bring it back to the 991's 400 hp. After adding some mods, it would take a tune to fully unlock the rest of the available gains from the hardware. It appears that the tuning on the 718 GT4 has much more headroom and is able to accommodate more airflow and add the necessary fuel to make more power as it comes from the factory. So in JC's defense, on a 718 GT4, you can add headers and a less restrictive exhaust and gain like 20+ hp and torque, which is quite a lot for a NA motor without risking your warranty. Yes, I'm sure a software upgrade would help even more, but it appears that it is not as necessary as it was for the 981 platform.

For older 981s and now the current 4.0 GTS, that have handicapped ECUs, a software upgrade obviously has a lot more upside to offer because they are or were starting out 20-25 horsepower down.

 

After having jwr9152 blow past me last fall I’ve decided to try Softronic on my 981. It may still be slower than his 718, but maybe it will make him work a bit more for it…..

 

That's great. I wouldn't say I blew past you. You were hauling, even more so considering the suspension issues you were fighting.

 

OK, so maybe a bit of hyperbole there, but you were clearly faster. When are we going back for a rematch?

 

​​​​​​​I'm planning on coming over in November for a time trial. Added some aero last week, so need to come test it out.

 

With the Tune on the GTS - you can raise the rev limiter by 400 RPMs

What does this do to the DME / overrev report (or counter)?

 

Ask the tuner.... it is technically possible to make a tune which disables the over revs from counting. Whether this is being done only they would know.

Otherwise you will be accumulating a sh!tton of stage 1 (2?) over revs over time. Doesn't bother me personally as the revs are worth it.

 

Any range 1 ORs are recorded if you hit the limiter. range 2 is shortly after. Ask the tuner how they handle it. It may be that the tune changes the limiter by +400, so if you remain under 8200 redline, it won't even be recorded? Let us know.

 

Anyone tune theirs without a battery tender? I live in an apartment building and there isn't an easy access to power. I drive my car multiple times a week so never needed a battery tender.

 

Flashed multiple cars over the years, probably +100 times. Never used a tender. If car has been unused for >1-2 weeks, I'd usually go for a 20 min drive to charge it.

 

depends on the tune, some do tend to use more power (fans blowing …) than others. Use a jumpstarter or spare battery in parallel.

 

I have never used a tender, etc. on any vehicle when tuning, and I have done a lot.

 

I loaded my Softronic tune with the car connected to an old 10A battery charger. At the end of the load, the alligator clips connected to the battery terminals were very hot, so I suspect the tuning process used a lot of energy from the battery. Based on this experience, at a minimum I'd want the battery connected to a trickle charger if I did the process again. Obviously a lot of people have successfully loaded the tune with no battery charger or battery tender, but to me it seems risky. What happens if you start loading the new tune and it fails because the battery voltage drops too low? Seems like it could leave the ECU in a state where it doesn't have a usable image, forcing you to physically pull the ECU and send it to the tuner so they could reload a valid image.

My suggestion is to find a PCA friend with a battery charger and an extension cord (or easy access to an AC outlet). Softronic makes it very clear that the car should be on a charger when the process is done.

 

Asked ME. Mine are raised +200. ME replied that overevs would not be reported at 8000.

Keep in mind that every time that you hit the rev limiter it will record a range 1. Range 2 is +200 from redline, through to range 6. It is ranges 3 to 6 that are not what you want to see and can only be achieved via a money-shift in a MT. PDK cars don't have the over-rev stats.