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i ordered the Dewitt's radiator. I'm willing to take a chance on it.
Outside temps were high 90s at Fontana.
First set of rounds on the track I went 4 passes before it went into limp mode.
Second set of rounds on the track all four passes went into limp mode in the turns and as I hit the straight away it got out of limp mode. As soon as I hit the turns it overheated again. I also got a power steering error. I want to take the front skid plate off right past the bumper.
The right answer is for GM to upgrade the cooling capacity to mirror the results of the Dewitts radiator (if it's better) as the standard radiator. Can't add more than $500 to $700 to the price and even those that aren't track rats would be OK with that.
What did they mean when they told us that it was the most track capable Corvette ever? Not enough people would uncover the lie to matter? It is embarrassing.
Maybe a thread needs to be started that tracks (pun intended) member's car temps at normal every day driving, and their track temps. Has it been determined whether the temps are only above expected when driving on the track? Maybe the cars that do hit limp mode, just run hotter on average due to a possible issue on some of the cars? Just throwing thoughts out here -
This is weird. Some have major issues, others none (see sushisean's post). Wondering if it could be certain cars got incorrect or earlier firmware in the ECU.
Agree that the "track capable" Z06 should not have this issue, period.
Tadge said if it is run in weather temps in the high 80's.
Unfortunately, the OP ran in the 90's.
Do the math!
He said that after the fact in an obvious attempt to cover what he assuredly knew was an issue. He also said that the m7 was the track configuration, but when I ordered my A8 with the z07 package, which has little utility outside of a track, no one said that you really need a manual if you wish to track. They really should just step up and help us out with some viable solutions. Not saying they will, but they should because of the way this car was positioned from the start.
Something doesn't make sense. Your description of the problem leaves me wondering. Coolant and Oil Temps just don't reduce because your car hit a straight. Your speed even in corners was more than likely in the 50 to 60 mph (maybe higher) range so there should have been plenty of cooling air coming through the radiator. Also, it takes some time on the straight for temps to come down any meaningful amount. So why did Limp Home go away as soon as you hit the straight and only appear when you were in corners?
How do you know it was in Limp Home mode in the corners due to over heating issues Vs the stability system activating?
On the street I haven't overheated the car yet but it does run hot if I drive aggressively. I do little of that since I use my energy at the circuit. That said, I have to put a front license plate on the car in the next week and as luck will have it I will drive through the Nevada desert this summer. I think it is possible to overheat the car on a public road, after all it's just a road. The car will have to run A/C and a front plate so things will get interesting. Edmunds did overheat a Z51 on the road and that car has a much better chance at cooling down than our cars.
Circuit lapping is far far more demanding on the car than any other type of racing/driving one can do in a Corvette. I think the evidence speaks clearly. The best non-pro drivers can overheat this car in 70*s weather. I have done so in 80*s but as I gain confidence and reduce lap times I have no doubt I can overheat it in a cooler climate.
We have a compound problem:
1. powersteering cooling is inadequate
2. water cooling is inadequate
3. some underperforming parts: speed sensor, fuel pressure sensor and possibly high pressure pump, 1st and 2nd gear syncro/rings/gears
We should keep an eye out for new part numbers surfacing for these systems.
The Dewitts radiators def help but you also need to run a lower temp t-stat and reprogramming the fans needs done as well. I was playing around with mine last week - oddly because my fans didn't kick on at all and the car over heated at a light before pulling into the NCM Bash comically. Still have no clue why the fans didn't trigger but it did it on the way home as well but I was data-logging and ready for it. When I shut the car off and turned it back on the fans came on both times. I ran it last weekend trying to replicate the problem and it didn't happen so I have no clue yet what's happening there. Anyone seen that one yet?
I digress, but anyway in playing with the OEM fan settings, they're set to come on pretty high. I believe they're kicking in around 195* and that is where the car starts protecting itself electronically in the tune as well. So, I'm not really sure why a car with heat issues is not trying to run the fans before it gets into it's caution zone.
I have a Dewitts rad, LMR 160 stat kit, and the fans programmed to come on much lower and the temps at the track do very well. Now as far as the trans... that's another story. I've been working on a dual fan unit that will replace the A8s front cooler to be able to keep the trans happier.
Also, our supercharger heat exchanger - stage 1 was recently completed and has been hitting some Z06 builds lately too.
The Dewitts radiators def help but you also need to run a lower temp t-stat and reprogramming the fans needs done as well. I was playing around with mine last week - oddly because my fans didn't kick on at all and the car over heated at a light before pulling into the NCM Bash comically. Still have no clue why the fans didn't trigger but it did it on the way home as well but I was data-logging and ready for it. When I shut the car off and turned it back on the fans came on both times. I ran it last weekend trying to replicate the problem and it didn't happen so I have no clue yet what's happening there. Anyone seen that one yet?
I digress, but anyway in playing with the OEM fan settings, they're set to come on pretty high. I believe they're kicking in around 195* and that is where the car starts protecting itself electronically in the tune as well. So, I'm not really sure why a car with heat issues is not trying to run the fans before it gets into it's caution zone.
I have a Dewitts rad, LMR 160 stat kit, and the fans programmed to come on much lower and the temps at the track do very well. Now as far as the trans... that's another story. I've been working on a dual fan unit that will replace the A8s front cooler to be able to keep the trans happier.
Also, our supercharger heat exchanger - stage 1 was recently completed and has been hitting some Z06 builds lately too.
I don't think a lower temp t-stat will make any difference at all road racing will it? When the car is running 240+ all the t-stat will do is maybe prolong it reaching 240+ for maybe a minute longer or so but thats it.
05-06-2015, 01:15 AM
HEAT SOAK at the track
