[Thehobbithouse]

Hey there,

As many of us know, the Cayman S likes to hit limp mode when tracking. As I have gotten better on the track, I have found that the issue comes up quicker and quicker. During my last track event I lost close to half of my 20 minute sessions due to the car needing a break.

So, I have started to get together a list of items to possibly help resolve the issue. I am well aware of the Suncoast page and their attempts to solve it as well, but was curious if anyone had any other suggestions.

So far the list is such:
Center Radiator
Possible Meth/Water Injection
NACA Air Ducts custom piped over the intercooler
Aftermarket Intercooler? (Does it exist?)
GTS Temp Servo(A possible fix that mainly helps prolong the problem judging by Suncoasts observations?)

I figure with winter approaching, it gives me a good amount of time to fiddle. But mainly I am just looking to see if anyone has any other suggestions and things I could have possibly missed.. Thanks!

 

[Pocketrocket]

Possibly consider heat wrapping as much of the exhaust system as possible. More of that heat you can trap in and stop radiating into the engine bay the better.

 

[it_manager]

There is a good topic about this issue in SunCoastParts Cayman track project build. They blame on some temp sensor. I would suggest to start from 3rd radiator kit, because from my point of view it is absolutely essential for track anyway.

 

[peaedvard]

Go catless to get some heat away from the motor, worked just fine for me

 

[Treemagnet]

Hey there,

As many of us know, the Cayman S likes to hit limp mode when tracking. As I have gotten better on the track, I have found that the issue comes up quicker and quicker. During my last track event I lost close to half of my 20 minute sessions due to the car needing a break.

So, I have started to get together a list of items to possibly help resolve the issue. I am well aware of the Suncoast page and their attempts to solve it as well, but was curious if anyone had any other suggestions.

So far the list is such:
Center Radiator
Possible Meth/Water Injection
NACA Air Ducts custom piped over the intercooler
Aftermarket Intercooler? (Does it exist?)
GTS Temp Servo(A possible fix that mainly helps prolong the problem judging by Suncoasts observations?)

I figure with winter approaching, it gives me a good amount of time to fiddle. But mainly I am just looking to see if anyone has any other suggestions and things I could have possibly missed.. Thanks!

Although many have tried, the problem has yet to be cured. Had a similar issue with my '60 Corvair. I tried a zillion potential solutions (slight exaggeration), but it never stopped randomly overheating in Houston traffic. Of course, always at the most inopportune time.

Rather than disappear down that rabbit hole once again, I sold our BS and await a GTS allocation (unfortunately, the delay may outlast me ). The fact that Porsche refuses to correct the problem or provide a reasonable solution is a massive burr under my saddle.

 

[Thehobbithouse]

Although many have tried, the problem has yet to be cured. Had a similar issue with my '60 Corvair. I tried a zillion potential solutions (slight exaggeration), but it never stopped randomly overheating in Houston traffic. Of course, always at the most inopportune time.

Rather than disappear down that rabbit hole once again, I sold our BS and await a GTS allocation (unfortunately, the delay may outlast me ). The fact that Porsche refuses to correct the problem or provide a reasonable solution is a massive burr under my saddle.

As much as I would love to get a GTS/GT4 and upgrade, I have a bit too much in this car, and can't really afford to make the switch. Fortunate for me I don't mind if she is a little bit of a Frankenstein(Thus the possible NACA ducts in the back window) so I am hoping I can figure something out!

There is a good topic about this issue in SunCoastParts Cayman track project build. They blame on some temp sensor. I would suggest to start from 3rd radiator kit, because from my point of view it is absolutely essential for track anyway.

I will be throwing that temp sensor in as well while adding the third radiator!

 

[cxmnh]

Go catless to get some heat away from the motor, worked just fine for me

Any video of your catless exhaust?
Which 718 model are you running as well?

 

[Thehobbithouse]

Any video of your catless exhaust?
Which 718 model are you running as well?

Also curious about how loud that would be... I have the Fabspeed Turboback currently, with race cats and its loud...

 

[peaedvard]

Sorry no videos, but i had this catless downpipes Catalytic Converters / Downpipes and stock mufflers, i had some problems on 95 DB tracks, i believe that they messured app 102 DB, but with closed valves the exhaust was accepted

 

[cxmnh]

Sorry no videos, but i had this catless downpipes Catalytic Converters / Downpipes and stock mufflers, i had some problems on 95 DB tracks, i believe that they messured app 102 DB, but with closed valves the exhaust was accepted

That catless downpipe works with stock axelback with stock muffler?

 

[peaedvard]

That catless downpipe works with stock axelback with stock muffler?

Yes it is a direct bolt on..

 

[daver]

There is a good topic about this issue in SunCoastParts Cayman track project build. They blame on some temp sensor. I would suggest to start from 3rd radiator kit, because from my point of view it is absolutely essential for track anyway.

Just starting tracking my Base Cayman. Havent seen oil temps > 235, but was wondering about the benefits of the 3rd radiator? Did some Googlin', but didn't see much references to the 2.0L. Anyone have info/experience on this?

 

[Treemagnet]

Just starting tracking my Base Cayman. Havent seen oil temps > 235, but was wondering about the benefits of the 3rd radiator? Did some Googlin', but didn't see much references to the 2.0L. Anyone have info/experience on this?

A 3rd radiator would probably benefit those doing heavy track time. Regardless, I'm not aware of any limp mode issues related to base 718's.

 

[KeinPDK]

There is an issue with the VVT motor overheating on the 2.5 turbo. No cure.

 

[worf]

There is an issue with the VVT motor overheating on the 2.5 turbo. No cure.

If the issue is specifically and only on the 2017 VVT motor, why isn't it possible to swap-in a VVT motor (or the entire Turbo) from a not-2017?

 

[KeinPDK]

If the issue is specifically and only on the 2017 VVT motor, why isn't it possible to swap-in a VVT motor (or the entire Turbo) from a not-2017?

That is the only info I can find. I know that the temperature sensor was also updated from the early cars. Best bet is to check the part numbers with your local Porsche parts department to see if there is an updated version.

 

[Treemagnet]

If the issue is specifically and only on the 2017 VVT motor, why isn't it possible to swap-in a VVT motor (or the entire Turbo) from a not-2017?

Don't know Porsche's official stance regarding limp mode. Regardless, I don't believe the "S" limp mode issue is confined to the 2017 model year, since I've heard claims from two 2018+ "S" owners who believe they experienced limp mode at COTA in March of 2021.

 

[KeinPDK]

Don't know Porsche's official stance regarding limp mode. Regardless, I don't believe the "S" limp mode issue is confined to the 2017 model year, since I've heard claims from two 2018+ "S" owners who believe they experienced limp mode at COTA in March of 2021.

I agree. Seems like they out out the bulletin early on and decided to forget about it.

 

[worf]

If the issue is specifically and only on the 2017 VVT motor, why isn't it possible to swap-in a VVT motor (or the entire Turbo) from a not-2017?

Don't know Porsche's official stance regarding limp mode. Regardless, I don't believe the "S" limp mode issue is confined to the 2017 model year, since I've heard claims from two 2018+ "S" owners who believe they experienced limp mode at COTA in March of 2021.

I agree. Seems like they out out the bulletin early on and decided to forget about it.

Ok. Then the next logical question is: What about 2.5 GTS parts since - AFAIK - it doesn't suffer from the overheat?

 

[Treemagnet]

Seems to me that would be a logical step; however, the S and GTS use different turbos. Therefore, I would also expect the need for many other parts and reprogramming to function properly. This is the reason I chose a different path.