[1BlinkGone]

I did see where there are quite a few cooling protocols implemented on the new CTS-V...

 

[Wrecked Em]

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.

 

[DRL650]

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.

 

[yetti96]

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.

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.

 

[JRockey]

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.

 

[Ol Dude]

I wouldn't be surprised if the next ZR1 is turbocharged.

My thoughts exactly. Supercharging is great in terms of packaging though, and probably why they're still doing it. I'm willing to bet they are doing R&D right now with turbos and the new LT motors, however.

 

[justinschmidt1]

if you want to use ring times as any indicator the hellcat does lap faster than a V2, granted that is a generation older vehicle so take it as you will

From what ive seen, the hellcat does not handle very well. I know I watched a youtube video where they were testing a few cars and the hellcat got beat around the track they were testing by a 2015 mustang gt with 270 less HP.

I almost think a car like the hellcat is able to make up A LOT of time on a high speed track like the ring simply because of the huge power it makes? Maybe I am wrong, Idk, just my 02c, I dont think the hellcat is an agile car

As expected, z28 was quickest.

Z28:1.41.80
GT: 1.44.80
Hellcat: 1.45.80

 

[TriTexan]

My thoughts exactly. Supercharging is great in terms of packaging though, and probably why they're still doing it. I'm willing to bet they are doing R&D right now with turbos and the new LT motors, however.

I saw a really nice custom twin turbo V that G-Force was doing. The packaging was way more compact than the stock blower. I can't imagine that an OE design made for twins couldn't be phenomenally better that a blower...

 

[Jay Lane]

I've mentioned a few times that I believe this will be a HUGE issue. Right now we are in the cooler season but when summer rolls around and people will be hitting the track, strip, & street we'll see what the weak spots are.

I respectfully disagree with your statement. I was at COTA with both the ATS-V and the CTS-V in August of this year and we ran the cars from 9am until 4pm without a single issue. The ambient that day was 107* and the track temps were over 130*. No overheating issues at all with regard to coolant or oil temps.

In fact the cars not only ran the track all day without issue, they were also subjected to idling for 10+ minutes while different groups of drivers exited and entered the cars. If that's not a heat torture test, then I don't know what is.

That being said, I'm sure that the LT4 pulled some timing due to the heat, but I don't call that a "issue" given that any SHOWROOM STOCK f/i car would do the same. Based upon my experience with the new V Series cars, ( 2 track events at COTA, multiple data logs on both CTS-V and ATS-V, and racing the ATS-V at the TX Mile) I can say with confidence that GM made sure these cars handle heat extremely well.

 

[TriTexan]

I respectfully disagree with your statement. I was at COTA with both the ATS-V and the CTS-V in August of this year and we ran the cars from 9am until 4pm without a single issue. The ambient that day was 107* and the track temps were over 130*. No overheating issues at all with regard to coolant or oil temps.

In fact the cars not only ran the track all day without issue, they were also subjected to idling for 10+ minutes while different groups of drivers exited and entered the cars. If that's not a heat torture test, then I don't know what is.

That being said, I'm sure that the LT4 pulled some timing due to the heat, but I don't call that a "issue" given that any SHOWROOM STOCK f/i car would do the same. Based upon my experience with the new V Series cars, ( 2 track events at COTA, multiple data logs on both CTS-V and ATS-V, and racing the ATS-V at the TX Mile) I can say with confidence that GM made sure these cars handle heat extremely well.

Jay...all due respect but the Hellcat was specifically built NOT to pull timing or lose power under ANY ambient temp conditions and was tested in even higher temps than 107. It too is a stock showroom car.

I guess when we are pushing $100k the expectations are pretty high. I don't want to have to make excuses to my fellow racers that my car isn't as fast as I said because it's too hot outside. That's hard to pay $90 to $100k and have to swallow that.

EDIT: Is it a HUGE issue? Like you said - probably not. It's is a valid point though...how big depends on your perspective and expectations.

 

[Jay Lane]

Jay...all due respect but the Hellcat was specifically built NOT to pull timing or lose power under ANY ambient temp conditions and was tested in even higher temps than 107. It too is a stock showroom car.

I guess when we are pushing $100k the expectations are pretty high. I don't want to have to make excuses to my fellow racers that my car isn't as fast as I said because it's too hot outside. That's hard to pay $90 to $100k and have to swallow that.

EDIT: Is it a HUGE issue? Like you said - probably not. It's is a valid point though...how big depends on your perspective and expectations.

Everyone knows that heat soak becomes a big issue with a f/i car after it is turned off or left to idle with no air blowing through the h/x. I can also say that the new V Series cars recover from heat soak much more quickly then the V2 due to the size of the factory h/xs and the size of the grill openings. I'd like to see some data logs from a Hellcat which prove that it doesn't suffer heat soak as opposed to a quote from one of their engineers.

I competed at the Sulphur Springs 1/2 mile event last month and there was a V3 owner competing in the event on Sunday. He made 29 back to back runs with out letting the car cool down for any length of time. The results were very consistent and in fact the car ran faster as he completed more back to back runs with it. I've pasted a link to the event results page so that everyone can see for themselves.
Final Results, #1 - Texas 1/2 Mile Shootout - Sun 11-15-2015

I don't think that any hot weather excuses will need to be made with this car especially when every other car I've been around ran worse when it's hot outside compared to when it is cooler/cold. No one with any racing experience expects their car to be as fast when it's 100*+ compared to 60*. Hell I picked up almost 5 mph at the Sulphur Springs 1/2 mile due to the ambient being 30* lower than it was at the TX Mile. Seems like a moot point.

 

[TriTexan]

Everyone knows that heat soak becomes the biggest issue with a f/i car after it is turned off or left to idle with no air blowing through the h/x. I can also say that the new V Series cars recover from heat soak much more quickly then the V2 due to the size of the factory h/x and the size of the grill openings. I'd like to see some data logs from a Hellcat which prove that it doesn't suffer heat soak compared to a quote from one of their engineers.

I was present at the Sulphur Springs 1/2 mile event last months and there was a V3 owner competing in the event on Sunday. He made at least 15 back to back runs with out letting the car "cool down" for any length of time. The results were very consistent and in fact the car ran faster as he completed more runs on it. I've pasted a link to the event results page so that everyone can see for themselves.
Final Results, #1 - Texas 1/2 Mile Shootout - Sun 11-15-2015

I don't think that any hot weather excuses will need to be made with this car especially when every other car I've ever been around ran worse when it'is hot outside compared to when it is cooler/cold. No one with any racing experience expects their car to be as fast when it's 100*+ compared to 60*. Hell I picked up almost 5 mph at the Sulphur Springs 1/2 mile due to the ambient being 30* lower than it was at the TX Mile. Seems like a moot point.

Jay - it seems some people are reporting ZERO issues and some are seeing some things. Maybe there's something minor going on that will be identified? Just theorizing here but I don't think people are making things up - so there's something there.

I too would like to see some good Hellcat logs. But a fair amount of anecdotal evidence supports the car is not suffering from any reported heat issues.

I'll go back to my previous comment: I want to see PRIDE in the GM engineer's about how well they did designing for heat. I have seen comments and responses to issues - but not that smile and sparkle that says, "We NAILED the heat issue." But I value pride a lot more...that's just me.

 

[larry arizona]

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

 

[TriTexan]

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

Right...not immune but won't pull timing lapping a 105 degree track...

 

[Jay Lane]

Right...not immune but won't pull timing lapping a 105 degree track...

Is there any empirical evidence that shows that the HC doesn't pull timing? Has anyone heard of someone racing a HC ALL DAY LONG around COTA in the summer time?

I'm not trying to beat a dead horse but if the only points anyone has are based on opinions instead of facts, then this HC vs V3 IAT2 argument is pointless. Tri, don't you think that the new V3 has having three, supercharger dedicated h/xs is pretty good evidence that the engineers took cooling seriously?

 

[TriTexan]

Is there any empirical evidence that shows that the HC doesn't pull timing? Has anyone heard of someone racing a HC ALL DAY LONG around COTA in the summer time?

I'm not trying to beat a dead horse but if the only points anyone has are based on opinions instead of facts, then this HC vs V3 IAT2 argument is pointless. Tri, don't you think that the new V3 has having three, supercharger dedicated h/xs is pretty good evidence that the engineers took cooling seriously?

Jay - I am not underplaying their efforts...far from it! Thermal stabilization happens in minutes not hours so a 15 to 20 min test in the right conditions is enough. As you said - idling and such are much worse abuse heat wise.

All I know is repeated, clear statements from Dodge that the car does not pulling timing even when driven in 100+ degree heat. So either they are lying their asses off or maybe they tested it. Yes, proof would be good...

As before Jay...people other than me are reporting heat problems. Are they making it up? I don't have the facts and don't profess to. But either we have mass lying and hysteria or there may actually be something going on.

But Jay - I don't want to publicly bash the product that earns your living. Finding and banishing the source of what others are reporting can only serve your benefit. Customers with more confidence are buyers not waiters, right?

I'll leave it here: Some people claim they are having heating issues. We don't know why. Yet.

 

[TriTexan]

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...

 

[larry arizona]

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

 

[TriTexan]

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.

 

[Jay Lane]

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.

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?