pkincy

Don't know. Here is the thread.
https://www.corvetteforum.com/forums...ew-dyno-s.html

okaythen

When z06 first came out, on youtube highway race it would not have any power or pretty slow vs a similar or lower close hp car, is it the same issue? This was awhile ago.

Any other major problems for the 2017 z06?

Thomasmoto

Alright, quick update on my 16 A8 overheating. Got to run at NOLA last weekend. Weather was almost even cold so it wasn't the best to gauge the problem with, but I really feel like it is now covered and won't be an issue anymore. I had the Dewitt's "KIT" installed. The radiator, large EOC and larger intercooler heat exchanger. On the 700 mile drive there, and on the return trip back, the coolant pretty much stayed at 188 and oil temp 157-171. I will know for sure the first weekend in June at the NCM track as that is usually our hottest temp weekend anywhere we go for Optima. I hope this helps. I feel like it was money well spent.

TKOGTO

1. how much were the parts for the DeWitts kit?
2. what was the ambient @ NOLA?
3. do you have your on track max temps for oil, coolant and trans?

Thanks

Thomasmoto

1. rad=$799.99 EOC=$899.99 & Z06 CAC=$599.99
These are list prices. PM if you really want to purchase and I can help you with the prices.
2. 68-78 degrees-like I said "almost cold", but I was able to drive the car hard enough to tell a difference
3. oil=261 coolant=237 trans=184
this info is from the PDR using the Cosworth Toolbox
I'll have the latest HP Tuners outfit for data at my next track day. I think I can do some fine tuning as well. I'll be drag racing every week until June 3-4. Might learn a few things there in the meantime.

evanft

Seems to me the best move is to wait until all this is completely sorted and then buy a used 15/16 in a year or two and then add in the extra cooling.

okaythen

Didn't they fix 15,16 already? with 2nd cooler?

And it's a small percentage 5%, but is it 5% of people that tracked the car or 5% of all z06 owners?

cvp33

Best move is to buy an M7.

Spacewalker

imho, that's too low for the oil temp.

Sure it's great on the track, but it's bad for wear on the street. Oil is designed to run 200+ for good wear protection.

Thomasmoto

I agree with you about the oil temp, but it does come up at lights, drive throughs ect... With the a\c on. Which I use year round. 180's to 190's. Enough to evaporate condensation.

TKOGTO

Interesting. Oil seems right in the sweet spot, coolant a bit on the high side but the trans temp is very, very low.

How many sessions did you do? 25 minutes each?

BTW: almost cold here in CT low 40s.

Thomasmoto

15 min sessions. Tried 3 of them, but still went into reduced power due to IAT's going too high. We think the intercooler pump is failing at times.

Yale

ok so , i'm a little behind on the overheating issue , i've got a 15 Z A8 and iv'e done several track days with it but mostly in feb , mar here in Texas ambient temps around 50ish degrees and no problems and I just ran COTA this past weekend and it was about 90 degrees and it didn't take long to realize car could only run about 4 laps and the oil temp went 300 , coolant temp was off the charts and of course it told me reduce speed and idle until eng temp is reduced, needless to say in the back of my mind i knew this might happen and not to mention most if not all other stock Z06's out there had the same issue, so i guess my question is what are most folks doing to correct the problem? does GM offer a kit to resolve it ? is the aftermarket the way to go ? has it be corrected on the 17's ? any thoughts would be greatly appreciated

KEZ06

I am interested in the Gspeed aftermarket solution. The amount of data they collected is substantial. They also discovered the water pump shut off issue that lasts for 3minutes if the system is not air bled properly. They ran an automatic in D at Cora for 40 minutes with now overheating issues. They have posted on the forum the work they did to deserve GM their package.

Yale

Thanks I'll check them out ! forgot to mention that when I manually shifted mine it did in fact make it better and i was able to run longer but it just prolonged the inevitable

GSpeed

Send us a PM if you're interested in any aspect of our kit, or feel free to give us a call at 877-512-5180

We have every possible corner covered to make these cars run right on track, with temps all under control.

Jsilvester81

the 17' 7M is the only c7z that is truley track capable.
the A8 only receive minor cooling upgrades.Those torque converter transmissions creates massive heat.

LG motor sports will set you up with a nice cooling system unfortunately warranty is voided if mod is added 17 7M car with significant cooling upgrades.

This is GM's passive aggressive way of saying we build a 1 lap track ready car in 15/16

If GM is redesigning the cooling process this is obvious fault.

Mad Dog 24

Cant say as I agree with the statement that the 17 is the only one out of the C7's. I track our 15 Z06 M7 often and going again next week. I have run it in the low to mid 90's and NEVER and overheat or even limp mode. The cars cooling system is all as it was delivered new with just a few mods that will not effect the warranty. We rapped the exhaust and cats, installed cooling heat sink fins to the factory oil\water cooler. No it does not have the GM optional front radiator either! Along with very specific track preparation. I do believe the M7 is the key. So this is what the bottom of our 15 looks like.





This was before the fins

irun4cops

z06 automatic is what I plan to buy in the next couple days... they have 0% on the 16's right now. I can pick one up, or go for a 17. Is it worth it to pay extra for a 17 vs a 16, or can i just fix the 16?

okaythen

yes you can fix it, but I think it voids the warranty. sorry that's all I know.