Experiment - GT4 Track Setup Wiki:
06-20-2016, 12:44 AM
#181
Drifting
Sorry for the people who had trouble, and thanks for being guinea pigs for the rest of us I guess. Hopefully the vendors of the aftermarket parts that failed or caused other failures will improve things or at least test and suggest other workarounds.
06-20-2016, 02:11 AM
#182
Nordschleife Master
06-20-2016, 02:21 AM
#183
Racer
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Not a apples to apples comparison but I had similar issues with a OST Cobb tune back when I had a GTR (neither the GTR nor Cobb left me with a warm fuzzy feeling).
My personal opinion is they don't do OST tunes with hardcore track rats in mind.
My personal opinion is they don't do OST tunes with hardcore track rats in mind.
06-20-2016, 09:38 AM
#185
Burning Brakes
I have a set of race CG headers coming - now what? I was going to Swain coat them but that does not solve the potential tune issue . . . I guess just sell them and cut my losses?
As a novice that ran Friday at COTA, I can honestly say that I do not need ONE mod on my car to love every second of it . . . even when I am being passed.
Sorry to hear this happened guys.
As a novice that ran Friday at COTA, I can honestly say that I do not need ONE mod on my car to love every second of it . . . even when I am being passed.
Sorry to hear this happened guys.
06-20-2016, 10:44 AM
#186
Rennlist Member
My car ended up at ATX because my CG sport headers set the rear hub wiring harnesses on fire. The entire harness that feeds the electric parking brake and speed sensor were destroyed and the car is not very happy now. If you've been on the fence about a ceramic coating and custom heat shields....do it!! Or don't get headers if you are serious about tracking it.
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I didn't have any problems with my Fabspeed sport headers.. maybe the shorter tubes are not as close to the wiring? I'm going to take a close look at mine on the lift and see though, maybe I was just lucky so far. Where was the wiring damage, back by the hub?
06-20-2016, 12:02 PM
#187
Yikes, sorry to hear, wondered what it was when you had an issue in the afternoon session yesterday.
I didn't have any problems with my Fabspeed sport headers.. maybe the shorter tubes are not as close to the wiring? I'm going to take a close look at mine on the lift and see though, maybe I was just lucky so far. Where was the wiring damage, back by the hub?
I didn't have any problems with my Fabspeed sport headers.. maybe the shorter tubes are not as close to the wiring? I'm going to take a close look at mine on the lift and see though, maybe I was just lucky so far. Where was the wiring damage, back by the hub?
BTW - durametric worked like a champ to diagnose and clear codes all weekend. The Cobb access point would not clear codes, nor had any description of the codes displayed.
06-20-2016, 12:06 PM
#188
Burning Brakes
This is bad news for the aftermarket. Have you engaged any shops/vendors in discussion about this failure?
I thought John @ BGB used cargraphic headers on all his race cars and 3.8L conversions. Why is the GT4 having such problems where those other cars aren't? "Because streetcar?"
I thought John @ BGB used cargraphic headers on all his race cars and 3.8L conversions. Why is the GT4 having such problems where those other cars aren't? "Because streetcar?"
06-20-2016, 12:35 PM
#189
Burning Brakes
This is bad news for the aftermarket. Have you engaged any shops/vendors in discussion about this failure?
I thought John @ BGB used cargraphic headers on all his race cars and 3.8L conversions. Why is the GT4 having such problems where those other cars aren't? "Because streetcar?"
I thought John @ BGB used cargraphic headers on all his race cars and 3.8L conversions. Why is the GT4 having such problems where those other cars aren't? "Because streetcar?"
06-20-2016, 01:02 PM
#190
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We recommend wrapping the manifolds or coating them when you live in hot parts of the country to cool the engine bay temps and hopefully reduce engine oil temps so it's not that we expect this to happen with manifolds that have not been coated. This is the first we have heard of things melting across 20 + track cars running our manifolds with AND without cats. In retrospect, realizing that COTA is one of the most thermally demanding tracks we visit in North America during the summer, we probably should have tried to help Shake N Bake get those parts to/from Swain in time for his season. It's nothing something we ever assumed would cause any damage to any wiring/dampers/etc, as none of our prior track history had resulted in anything behavior such as this.
Since my original reply however, I have since been in contact with ShakeNBake. While I have not had any problems such as those mentioned above with the Cobb Tuning, i have reached out to him with the intention to help, reveal something or do anything to try and add some support. I just wanted more intel to determine a starting point.
Since my original reply however, I have since been in contact with ShakeNBake. While I have not had any problems such as those mentioned above with the Cobb Tuning, i have reached out to him with the intention to help, reveal something or do anything to try and add some support. I just wanted more intel to determine a starting point.
Last edited by BGB Motorsports; 06-20-2016 at 02:03 PM.
06-20-2016, 09:38 PM
#191
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Car went completely into limp mode towards end of morning session and limited me to 40mph getting back to pits once "reduced power" warning came on. Let it cool down, cleared error codes and uninstalled tune, the only non-suspension mod on car. Worked fine after that and finished afternoon sessions, which were even hotter, without any issues.
I obviously can't definitively say that the tune caused my issue. We only have two different data points, which doesn't make a trend; however, we also cannot ignore that out of a number of GT4's there the weekend, the two with a tune went into limp mode and worked fine after reversing back to stock tune.
Makes you go hmmmm?
Anyway, I think the point being that performance modding that is not specifically designed for track conditions and hard tracking may not work well together, especially if you throw in high heat.
-----------------------------------------------------
Both cars went into limp mode with CELs caused by a what I can only guess was a tune that was not designed for track use. Lots of over-limit codes. One had all the theoretically go fast goodies on it, and the other was stock.
Edit: Going back to Stage 0 (Stock) got them back on the track without issue.
My car ended up at ATX because my CG sport headers set the rear hub wiring harnesses on fire. The entire harness that feeds the electric parking brake and speed sensor were destroyed and the car is not very happy now. If you've been on the fence about a ceramic coating and custom heat shields....do it!! Or don't get headers if you are serious about tracking it.
Overall a fun weekend, but it made me and a couple others regret modding our cars. I'm putting things bad to stock engine wise. I'd prefer to have a running car when there is 3 days of pristine open F1 track.
I obviously can't definitively say that the tune caused my issue. We only have two different data points, which doesn't make a trend; however, we also cannot ignore that out of a number of GT4's there the weekend, the two with a tune went into limp mode and worked fine after reversing back to stock tune.
Makes you go hmmmm?
Anyway, I think the point being that performance modding that is not specifically designed for track conditions and hard tracking may not work well together, especially if you throw in high heat.
-----------------------------------------------------
Both cars went into limp mode with CELs caused by a what I can only guess was a tune that was not designed for track use. Lots of over-limit codes. One had all the theoretically go fast goodies on it, and the other was stock.
Edit: Going back to Stage 0 (Stock) got them back on the track without issue.
My car ended up at ATX because my CG sport headers set the rear hub wiring harnesses on fire. The entire harness that feeds the electric parking brake and speed sensor were destroyed and the car is not very happy now. If you've been on the fence about a ceramic coating and custom heat shields....do it!! Or don't get headers if you are serious about tracking it.
Overall a fun weekend, but it made me and a couple others regret modding our cars. I'm putting things bad to stock engine wise. I'd prefer to have a running car when there is 3 days of pristine open F1 track.
Anyway the melting hub wiring was the root cause of the car going into limp mode? We do not raise the Rev Limits on our OTS maps, is there a possibility of a miss shift or money shift that caused the overlimit code? I'm not trying to point fingers, just trying to collect as much data as possible to help get to the bottom of the issue. The Accessport has the ability gather tons of information if it is set up to datalog before you go out on track. If any situations like this do arise the data from the log is easily accessible and much of the guess work is removed
We had a member of our COBB Porsche team at COTA yesterday who would have been very willing to help out. Always feel free to shoot us an email anytime. Being fellow car enthusiasts we are often at many local events.
If you ever encounter any issues please feel free to contact us any time!
Mitch, Jared, Joe, and myself are almost always available to field any questions, comments, or concerns anyone may have.
Porsche.Experts@Cobbtuning.com
-Jon
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Last edited by COBB Tuning; 06-20-2016 at 10:05 PM. Reason: grammar
06-20-2016, 11:24 PM
#192
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To add to my previous post slightly,
The P0068 and P1074 codes that will appear with a code scan for you folks running an Accessport with your IPD plenum are designed to still show up during a scan but will not put the car into limp mode when the AP is installed.
Thanks everyone!
-Jon
The P0068 and P1074 codes that will appear with a code scan for you folks running an Accessport with your IPD plenum are designed to still show up during a scan but will not put the car into limp mode when the AP is installed.
Thanks everyone!
-Jon
06-20-2016, 11:40 PM
#193
I'm sorry to hear about any issues you had at the track, did you guys happen to pull the codes or take any datalogs? Do you have any data you can send to us from either car? The Accessport has the ability gather tons of information if it is set up to datalog before you go out on track. If any situations like this do arise the data from the log is easily accessible and much of the guess work is removed
We had a member of our COBB Porsche team at COTA yesterday who would have been very willing to help out. Always feel free to shoot us an email anytime. Being fellow car enthusiasts we are often at many local events.
If you ever encounter any issues please feel free to contact us any time!
Mitch, Jared, Joe, and myself are almost always available to field any questions, comments, or concerns anyone may have.
Porsche.Experts@Cobbtuning.com
-Jon
We had a member of our COBB Porsche team at COTA yesterday who would have been very willing to help out. Always feel free to shoot us an email anytime. Being fellow car enthusiasts we are often at many local events.
If you ever encounter any issues please feel free to contact us any time!
Mitch, Jared, Joe, and myself are almost always available to field any questions, comments, or concerns anyone may have.
Porsche.Experts@Cobbtuning.com
-Jon
I just wanted to get back up and running as soon as I could and get on with the weekend. I removed the tune as it is the only performance mod I have and it seemed like the logical thing to do. After that the car was okay and I was just happy that I could finish up the weekend.
I really got the tune as I like the way it feels more responsive on the street and it was not really to get more track performance, but as I mainly use my car on the track I am going to just leave it off for a while and see what the car does in my upcoming events in the heat. Eliminates one variable.
If I decide the re-introduce the tune I will take you up on your offer to help set it up to capture data logs for in case something happens again to help figure out what is going on.
The problem with using the AP on the track is that the OBD port is right above the pedals and with the way the cable attaches there is no way to attach it and leave it in for me and not be kicking it constantly as I change gears/brake.
06-21-2016, 09:07 AM
#194
Burning Brakes
06-21-2016, 01:58 PM
#195
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Thanks for the response and offer to help. I did not collect any data. Shake helped me look at and clear the error codes. In all honesty, I was a little freaked out and in a rush and did not even think of doing track side data collection etc.
I just wanted to get back up and running as soon as I could and get on with the weekend. I removed the tune as it is the only performance mod I have and it seemed like the logical thing to do. After that the car was okay and I was just happy that I could finish up the weekend.
I really got the tune as I like the way it feels more responsive on the street and it was not really to get more track performance, but as I mainly use my car on the track I am going to just leave it off for a while and see what the car does in my upcoming events in the heat. Eliminates one variable.
If I decide the re-introduce the tune I will take you up on your offer to help set it up to capture data logs for in case something happens again to help figure out what is going on.
The problem with using the AP on the track is that the OBD port is right above the pedals and with the way the cable attaches there is no way to attach it and leave it in for me and not be kicking it constantly as I change gears/brake.
I just wanted to get back up and running as soon as I could and get on with the weekend. I removed the tune as it is the only performance mod I have and it seemed like the logical thing to do. After that the car was okay and I was just happy that I could finish up the weekend.
I really got the tune as I like the way it feels more responsive on the street and it was not really to get more track performance, but as I mainly use my car on the track I am going to just leave it off for a while and see what the car does in my upcoming events in the heat. Eliminates one variable.
If I decide the re-introduce the tune I will take you up on your offer to help set it up to capture data logs for in case something happens again to help figure out what is going on.
The problem with using the AP on the track is that the OBD port is right above the pedals and with the way the cable attaches there is no way to attach it and leave it in for me and not be kicking it constantly as I change gears/brake.