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718 GTS 4.0/GT4/GT4RS/Spyder/25th Anniversary Discussions about the 718 version of the GT4RS, GTS 4.0, GT4, Spyder and 25th Anniversary Boxster
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Accessport for GTS 4.0/GT4/Spyder

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Old 12-04-2022, 11:34 PM
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I know I missed it but it’s hard to parse through all of the directions of this thread.

why do the dyno charts only go to 7500? Does the tune allow for the GTS to rev to 8k?
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Old 12-04-2022, 11:52 PM
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https://rennlist.com/forums/718-gts-...l#post18432957
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Old 12-05-2022, 12:31 AM
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Originally Posted by c1pher

I did see that response. I was hoping there was an update or at least a response that made sense for product development.
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Old 12-05-2022, 03:34 PM
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Originally Posted by 008
I did see that response. I was hoping there was an update or at least a response that made sense for product development.
Apologies! I thought I posted this in this thread previously but it must have been elsewhere. We did some pulls in a GT4 that recently came in for some testing and got a full plot for everyone! This was a bit tricky to get our software to read correctly. Around 7500+ RPM, the tires started to deform a little which threw off some of the calculations. With some corrections to our math and dyno, this should be all good!




Let me know what ya'll think!

- Andrew
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Old 12-05-2022, 06:10 PM
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Originally Posted by COBB Tuning
Apologies! I thought I posted this in this thread previously but it must have been elsewhere. We did some pulls in a GT4 that recently came in for some testing and got a full plot for everyone! This was a bit tricky to get our software to read correctly. Around 7500+ RPM, the tires started to deform a little which threw off some of the calculations. With some corrections to our math and dyno, this should be all good!




Let me know what ya'll think!

- Andrew
Does this change peak or other numbers at all?
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Old 12-05-2022, 06:25 PM
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Originally Posted by c1pher
Does this change peak or other numbers at all?
This GT4 made 412 WHP & 317 ft. lbs. vs 361 WHP & 291 ft. lbs. which is pretty much what we've seen on all the cars on our dyno thus far.

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Old 12-07-2022, 06:07 PM
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Got Cobb installed on my car. My car isn't USDM, so support sent me a special file for my car.
So far, a lot more torque everywhere. Have a trackday booked in a couple of weeks, to compare top speeds and lap times.
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Old 12-07-2022, 06:26 PM
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Originally Posted by COBB Tuning
Apologies! I thought I posted this in this thread previously but it must have been elsewhere. We did some pulls in a GT4 that recently came in for some testing and got a full plot for everyone! This was a bit tricky to get our software to read correctly. Around 7500+ RPM, the tires started to deform a little which threw off some of the calculations. With some corrections to our math and dyno, this should be all good!




Let me know what ya'll think!

- Andrew
Thanks Andrew. What modifications were on this vehicle? OTS map or ProTune?
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Old 12-15-2022, 04:21 AM
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Originally Posted by Clark_Kent
Thanks Andrew. What modifications were on this vehicle? OTS map or ProTune?
i assume its a protune.... which still looks great for stock non modded one
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Old 12-15-2022, 08:34 AM
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Originally Posted by alwaysdriving
i assume its a protune.... which still looks great for stock non modded one
Unless I’m missing something, this is Cobb’s tune.
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Old 12-20-2022, 02:59 PM
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For those of you who are in California, we are excited to share that the Accessport for the 4.0L 718 cars is now 50-State Legal and covered under C.A.R.B. EO D-660-122.

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Old 12-20-2022, 03:20 PM
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Does the accesport need to stay plugged in/mounted in the cockpit at all times or just for installation and monitoring? TNA
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Old 12-20-2022, 03:22 PM
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Originally Posted by COBB Tuning
For those of you who are in California, we are excited to share that the Accessport for the 4.0L 718 cars is now 50-State Legal and covered under C.A.R.B. EO D-660-122.
Any chance of a CARB discount code?
Never hurts to ask.
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Old 12-20-2022, 04:07 PM
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Originally Posted by 008
Does the accesport need to stay plugged in/mounted in the cockpit at all times or just for installation and monitoring? TNA
The latter. Once the engine map is installed the Accessport doesn't need to stay plugged in unless you want to datalog, make use of gauges, view/clear codes, etc.
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Old 12-21-2022, 08:19 PM
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Originally Posted by jgreen76
Any chance of a CARB discount code?
Never hurts to ask.
I'll ask as well...
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