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tc=traction management right? I am guessing it works really well so people just leave it at drag strips, and maybe people get the best ET with it? important info as on day to day drive it will save the tires! good to know
One poll I saw before but I can't find it no more, it's a poll to see which transmission people pick, it was almost a tie but I was trying to find the thread to confirm. anyone know the poll thread that I am talking about? (What the public pick influences me a little also)
Well hopefully you get more runs the next time and everything works out better, the car probably can go much faster huh. What was your trap and 60'?
I was in Sport mode. I think the only difference in Sport and Track is with the suspension. Stiffer in Track which may hurt 1/4 mile racing. I would think from looking at our file that this torque management is going to happen in any of the modes. I have only read my file and have not tuned the car.
Process - Did a short burn out. Just long enough to see smoke coming off the tires. Probably didn't even need a burnout with these Hoosiers and as well as the track was prepped. And with all the tm at launch. Tb only opens to 40% and timing advance to 8* at launch even with stabbing it hard. No kr so I'm sure a little more advance would help too. At 15 mph tb was open about 70% with advance up to 12*. Ideally 100% by this speed.
The DA was low with a 48* temp. I believe around -800???
Thanks.
Hoosiers were the best thing I found for my V-8 Fiero too. Despite the rear weight advantage of a rearward-mounted mid-engine, pretty much anything else wouldn't hook, and put the power down.
Last edited by Warp Factor; 04-24-2017 at 04:14 PM.
A fan switch would do more than a larger more efficient radiator in the staging lanes. Without air flowing across any radiator the engine is going to heat up. Unfortunately nobody I've found makes a fan switch or even knows how to install one on the 2017s. And I've checked with three shops that say it can't be done.
FWIW I had a 15Z A8 with overheating problems. Now have a 17Z A8 with much better performance on the track. Not a complete fix my any means, but it has not gone down on power in about 200 hard track miles. I do see 250*+ water and as much as 310* oil after 8-10 laps in 70* ambient. Much better than the 3-4 laps and pulled timing etc of my '15. The new 100 octane tune helps for sure, and running 100 helps stretch out/prolong the overheating.
Not to the point of going into limp mode but my 2017 does have a problem with 1/4 mile racing. When I launched after staging lanes and burnout my manifold temp go up to 136.4* at launch with a 204.8 engine temp. This is pulling timing temperatures. At the end of the track I recorded 152.6* manifold and 215.6 engine coolant. At these temps I was running only 15* of timing at WOT. Normally 20* or more. And this was with an ambient of 48.2*. On street WOT pulls, in Mexico of course, I record just yesterday 123.8* manifold and 195.8 engine temp at 146 mph with an ambient of 51.8*. But this was with the car moving prior and launch temps 91*and 189* coolant.
I still managed a 10.6 pass even with those temps. I would imagine much better even were my temps same as on the street.
Originally Posted by 8850
I was in Sport mode. I think the only difference in Sport and Track is with the suspension. Stiffer in Track which may hurt 1/4 mile racing. I would think from looking at our file that this torque management is going to happen in any of the modes. I have only read my file and have not tuned the car.
Process - Did a short burn out. Just long enough to see smoke coming off the tires. Probably didn't even need a burnout with these Hoosiers and as well as the track was prepped. And with all the tm at launch. Tb only opens to 40% and timing advance to 8* at launch even with stabbing it hard. No kr so I'm sure a little more advance would help too. At 15 mph tb was open about 70% with advance up to 12*. Ideally 100% by this speed.
The DA was low with a 48* temp. I believe around -800???
48 degrees -800 DA running world class at 10.6s!?
Also, tuners on here have commented about the ZO6's torque management. They basically said that it was obviously a GM life preservation measure!
Try sitting in line for a few more and then tell us how it goes!
Last edited by johnglenntwo; 04-25-2017 at 08:33 AM.
48 degrees -800 DA running world class at 10.6s!?:rofl:
Also, tuners on here have commented about the ZO6's torque management. They basically said that it was obviously a GM life preservation measure!
Try sitting in line for a few more and then tell us how it goes!
Well....that's better than what a bone stock 2006 Z06 with only 505 HP, but with drag radials can run.....10.715 @130.32 with a 1.604 60' with 45 degrees air temp and a DA of -1565.
2017 Z06/07 A8 Convertible... in full auto the car will go into limp mode (both high water and high oil temp) within 3 to 5 laps when driven hard... this was in ambient 70-75 degree weather.
By using paddles ("M" mode) and by short shifting (5,500-5,800) you can totally manage the water and oil temp issues... at least in moderate ambient temperature days... BUT... other issues will start to appear.
Under heavy load at these higher rpm's I consistently get "engine power reduced" even though temps are okay. This issue appears to trace back to a design flaw in the IC reservoir/pump system, where excess air causes the pump to cavitate and shut down completely. The air cannot be totally removed from the system (dealer has tried) and there are no sensors that monitor any of this directly. Only true fix is aftermarket parts (GSpeed has a long thread about this issue and the fix).
Also... still having intermittent P0106 codes and resulting reduced power from that (MAP error). Happened twice during yesterday's track day. Again it only occurs when rpm range got above @5,800-6,000. Car is going back to dealer Monday for another try to find and fix this issue.
Yesterday was actually cool ambient temps... 65-68 degrees.
Running 4-6 seconds off my normal lap times and still had a couple of issues but no temp related issues.
Bottom line: even the 2017 is only good for 2 or 3 hard laps before it can be overheated... maybe a couple more in paddle mode.
Are there any owners of a 2017 A8 Z06 that can state that GM has eliminated the overheating problem on the race track?. It's hard to believe that a simple hood and supercharger cover design change that improves air flow will eliminate the problems. GM had to put 11 heat exchangers and 3 radiators on the 2017 ZL1 Camaro to keep it cool on the track. After having had and enjoyed C5, C6 Z06's as well as a 2010 ZR1 I passed on buying an A8 2015 or 2016 Z06. I would have had the same overheating/power loss problems that owners of stock 2015 Z06's owners had who raced at the PBR drag strip in FL. Most had to make air intake, stat, 80/20 anti-freeze modifications. I would have had the same problem running on the street in FL. After owning my 2010 ZR1 I bought a new 2012 GTR which I like for the power and performance but hate for the comfort. I made 2 or 3 full 1/4 mile runs as well as spirited street driving every time I used my Z06, ZR1 and now make on my GTR without problems. My Z06's and ZR1 ran at 228 degrees and my GTR engine temp is 177 degrees with trans temp at 188 on 95 degree summer day. I plan to keep my GTR but I would still like to buy a 2017 Z06 instead of a 2017 ZL1 Camaro. I look forward to seeing 2017 Z06 1/4 mile Fast List times on the forum. Thanks.
I have a 2017 Z and drive it aggressively in the heat. It never comes close to overheating.
I have a 2017 Z and drive it aggressively in the heat. It never comes close to overheating.
M7 - 105 degrees!
I think the real trick with the A8 has to be hitting very high speeds, especially with stage 3 aero, though. That's where it is quite uniquely divergent from the other transmissions we are seeing!
Last edited by johnglenntwo; 06-23-2017 at 07:56 AM.
I feel like I need to put this in here: None of these cars are actually overheating, the ECM is shutting down the power before they overheat, technically.
We are now in the months where we find out if the 2017 fixed the issue, keep in mind not every 15/16 got the overtemp warning either, if only some small percentage of 17s get it then it's clearly not fixed, it's the same.
I feel like I need to put this in here: None of these cars are actually overheating, the ECM is shutting down the power before they overheat, technically.
We are now in the months where we find out if the 2017 fixed the issue, keep in mind not every 15/16 got the overtemp warning either, if only some small percentage of 17s get it then it's clearly not fixed, it's the same.
When temps EXCEED max and enter the "red" zone I think that is considered "over heating". In 75 degree ambient air temp I hit 263 degree water (red zone) and 298 degree oil temp (just shy of the 300 max recommended) and did so in under 6 laps. The car "shut down" in response to the excessive water temp but the oil would have been over 300 in another lap. This is a 2017 Z07 A8. The track overheat issues are NOT "fixed". They might be better but not fixed.
On the street I can't get close to over heating the car, but on track it's a real effort to manage temps by modifying driving style to DELAY the over heat... but all I'm doing is delaying not avoiding... and to do it you have to give up performance.
When temps EXCEED max and enter the "red" zone I think that is considered "over heating". In 75 degree ambient air temp I hit 263 degree water (red zone) and 298 degree oil temp (just shy of the 300 max recommended) and did so in under 6 laps. The car "shut down" in response to the excessive water temp but the oil would have been over 300 in another lap. This is a 2017 Z07 A8. The track overheat issues are NOT "fixed". They might be better but not fixed.
On the street I can't get close to over heating the car, but on track it's a real effort to manage temps by modifying driving style to DELAY the over heat... but all I'm doing is delaying not avoiding... and to do it you have to give up performance.
Totally agree, as my experience w my 15 and 17 are the same. Seems my oils temps on my 17 out pace the coolant temps. Still not fixed, just better.
Last edited by Dabigsnake; 06-23-2017 at 10:54 PM.
A8 has no number but it's worse! Add around 10 degrees cooler from the new SC and tune.
And oops, I had it wrong before and it's not good for anything like 95 degrees!
Tadge said low speed auto engine RPM's cause all the heat.
Compare the A10 and just wonder if the lack of A8 high speed gear isn't making the engine work more? Would that make it invalid with the stage 3 aero? Is not working real well high speed evidence of anything? The power is said to be very anemic high speed!
Last edited by johnglenntwo; 06-24-2017 at 12:53 AM.
Its a safe bet that there are a lot more coolers on the ZR1. Without a doubt this car will be just as efficient at cooling things down as the Camaro ZL1. They are going to sell the ZR1 as the ultimate track car and finally they will have a C7 model that has the chops to run at the track all day long. GM cannot afford to miss out on this opportunity.
Sure they can, look how many C7Z's were sold despite it's track deficiencies...
I have a 15 Z A8 and got into limp mode couple of times in the track (3 out of 5 track days). Modded the car slightly with 2.31 upper pulley, expansion tank, SC spacer, catless xpipe, haltech cai w nomex and a tune in hopes that the combination can still survive few laps without going into limp mode but actually got into overheating instead in the second lap!
Anyway was thinking of replacing the sc cover with 17' if it helps but reading through this post, seems it won't.
leaning towards installing meth/water kit now and see if it works out!
04-24-2017, 03:04 PM
