Cadillac CTS-V Forum banner

Improvements over the Z06

6.7K views 47 replies 22 participants last post by  buddyg  
#1 ·
With all the cooling issues with the Z06, Im wondering if anything was addressed with the V? It seems that most people who have tracked the Z hard have had overheating issues with the oil and coolant. The V has a larger grille to get air through so maybe no changes were needed.

There have been quite a number of issues that have popped up along with whining rear ends and clunking transmissions. Learning curve I presume on a first year car (drive train). I'm just hoping that what GM has found they have addressed before the V goes into production 6 weeks from now.

Its nice to have the Z06 forum to look at how the car ( more or less the drive train) is performing as well as any issues. Its like a sneak peak at what I have in store with the V.
 
#4 ·
GM, like all others, will not admit fault. The C7/C7Z chief engineer explained the C7Z was tested at lower external air temps than those reporting cooling issues.
One would think after that line of bull, GM is working on a fix,,, always issues on first-year production models.
And one would think the 'fixes' would show up in the 2016 V3.
 
#10 · (Edited)
The press release from the chief engineer was that the car was originally designed and tested with 7 speed manual, which apparently they ran indefinitely without issue.
The isolated overheating issues apparently have only occurred in the auto, which is 8 speed and run higher rpms on average.
Believe it or not...

I suspect the V will not have that issue since it is slightly detuned and road coarse runs will probably not be driven as hard as the Z, since it weighs 1000lbs more.


Sent from my iPhone using Tapatalk
 
#5 ·
norcal here had his Zo6 blow up and bought back, and locally a friend of mine couldnt get rid of his fast enough it had spent so much time in the dealer.

its a shame really because I always thought hot/extreme weather testing was part of the procedure when coming out with new cars and drivetrains
 
#6 ·
What an embarrassment. I really though the z06 would be the ultimate but it's falling short.

I went to Exotics Racing and drove one. It was great but the instructors had me keep it in a higher gear and do extra cool down laps because it ran so hot. Car was barely used before and it was struggling with the heat. Meanwhile the Porsches and Ferraris are going all day without issue. It wasn't even a hot day. Looking back at the video it didn't even hit a higher speed on the straight than the GT3 or 458, which supposedly are down 90 and 175hp. Like wtf is going on?

Anyway, should the V manage the heat better due to having more frontal area and development time? Yes. Will it? I'm skeptical. GM seems to fall short every now and then. I mean look at their car configurator on their website. It's a joke! Not that it has anything to do with the cars but ...
 
#7 ·
What's the word
 
#9 ·
So the new V is hampered by the same issues at Z06?
 
#13 ·
I'm not aware of there being any LT4 failures in the CTS-V especially due to heat issues. I don't know the exact differences between the Z06 and the V3 with regards to the H/X capacities, but its pretty easy to see that there is way more airflow around the engine in the V3. I would also say that the openings to the H/X appear to be much larger than on the Z06.
 
#18 ·
The V2 has heat issues too. Needs a bigger intercooler rad. Need rear diff cooling. HX expansion tank, etc. If the engine and trans stay cool we can fix the other stuff. I have a 7 gallon trunk tank which is a huge buffer. I have an upgraded HX up front. I still have my stock HX and I'm thinking about creative ways to use it to help she'd even more heat.

Hell, even the V2 brakes will catch on fire stock. Fluid and pad mods needed. So it's not something unfamiliar to us. But CORE cooling issues can be more challenging. I am confident that, like with the V2, the market will come up with solutions.

It's just a shame to seen these "pedestal" cars suffer from what most would consider a very basic flaw. Overlooking the heat caused by going from a manual test mule to an auto seems like a poor reason for a professional engineering team. That means they were on the edge with the manual if just the auto causes the car problems.
 
#20 · (Edited)
Well...I modded a brand new V2 with 1000 miles on it. It wasn't 90k but the principle is the same.

But then again, MUCH more was known about the V2 when I bought mine. The V3 is a brand new platform without a lot of modding experience. But cooling mods on the stock mechanicals I would be much more comfortable with. Now who is qualified to design such mods is another story entirely. Slapping in a bigger radiator on a car with sophisticated wind tunnel testing behind it isn't a simple task...
 
#22 ·
To me it looks like they simply went with too small of a blower for their desired power output. From what I gathered, they apparently needed the blower lid to be lower profile for euro pedestrian crash standards. The only way they could accomplish this was to make the rotors smaller so they would nest lower in the block V.

I wouldn't be surprised if the next ZR1 is turbocharged.
 
#23 ·
I have a 2016 Z06 and I belong to Corvette forum where I have seen some Z owners who have had cooling issues? But many many more of us who have NOT had any cooling issues, myself included? Could it use cooling improvements? FOR SURE we all know the Supercharger creates alot of heat. I live in Florida and we have high humidity and heat so far no problems at all, If you track the car in the summer in high heat I would agree upgrade the cooling, But for me who and some back street drags no need to upgrade cooling. Damn I love this new V.
 
#24 ·
Have you come out to any local event with your V or Z? I am in Naples.

I did wonder this though that if the car press blew up the heating/cooling issues with the new LT4 and the mass population will be just fine with their cars.

Just a day or two ago my FB was blowing up with the $40M penalty to MINI for their side impact crash test issues and recall. The usual internet geniuses came out of the woodwork to explain why that company is shit and they can;t build a good car etc. The recall is to install a foam piece that is roughly 20 square inches of side impact polystyrene foam that is held in with hot glue. I knew about the recall and waited until the next scheduled service visit to get it done but if you looked at the internet, the sky is falling and peoples lives are in danger.

This intrigues me to think the LT4 is fine with the 1.7l blower but the big power guys are going to mod the piss out of it anyways and build it bigger/faster/stronger and it becomes a moot point.
 
#25 ·
Comparing the front end of the Z06 with the V3 it is apparent that there is more surface area/ cooling openings. If you look closely you can even see the small radiators located in the openings next to the fog lamps.

 
#33 ·
Tri, are you sure the hellcat does not suffer the same IAT2 limitations as other SC cars?

Pretty sure the HC pulls timing at the same 140f as the LSA.

They likely come with more stock HX but the have similar pump to the V2. Possibly better IC brick.

But they are not immune to heat soak.


Sent from your Mom's bedroom using TapaMilf 2.0
 
  • Like
Reactions: Ross L
#37 ·
How's Barry's HC doing? We have a few of both cars running around now. Should be able to get trusted input from owners we know and respect. My opinion, as you said, is just that...
 
#38 ·
Did the V2 have iat2 issues stock on road course or 1/4 mile?

Hot lapping is much better at keeping the Iat2 in control compared to making a run and parking it in the pits. Parking will heat soak a SC car within minutes.


Sent from your Mom's bedroom using TapaMilf 2.0
 
#39 ·
We gotta remember - some V2's had rear diff issues, some didnt. Some had wheel click and some didnt. Some had creaky sunroofs. Mine has been perfect. If the V3 has some examples with an issue or two, it's not going to deter a buyer like me. I think most of us will assume that either us or GM will find solutions and improvements to make as the new Gen V gains broader ownership.
 
#40 ·
Maybe I've missed a post or two but I don't remember anyone having overheating issues with the V3. Am I missing something? Is there a thread related to it that I may have missed?
 
#46 ·
Wow...not good!
I did some searching while on the toilet and came across discussions about IAT on the hellcats, there are people installing aftermarket HX, and some kind of iat harness ,recording 130-140 temps. Texan- maybe browse around the hellcat forums and compile some data but it does look like they are talking about it and products are sold to improve on the factory hallcat system
Ok...crow eaten. You are right - just like the best place for honest, unbiased info on the V is right here on the V forum, I bet a forum of Hellcat owners is probably a good source of the REAL story on that car too.

I'll do my homework and figure out a way to redeem myself with Jay...
By far the best time for research IMHO
i do some of my best research in there
Indeed. Toilet and shower time seen to be where the male brain can do its thing best. I guess it's one of the fewer times that less than 95% of my brain isn't being used to think about female ass, so some extra neurons are freed up for other things.
 
#43 ·
I did some searching while on the toilet and came across discussions about IAT on the hellcats, there are people installing aftermarket HX, and some kind of iat harness ,recording 130-140 temps. Texan- maybe browse around the hellcat forums and compile some data but it does look like they are talking about it and products are sold to improve on the factory hallcat system
 
#44 ·
By far the best time for research IMHO
 
  • Like
Reactions: Jay Lane
#48 ·
There are guys running at the Road Course with the Cats and I have not heard anyone complain of Heat Soak. All cars suffer from Heat Soak but you should be able to run hard for 15 to 20 minutes without pulling power which is what the Hellcat will do.

I have heard the stories of the Z's having issues pretty quickly, hope they don't have the same problem with the V3.