new Z06....cuts power after hard runs...
 

So....

2015 Corvette Z06 Is Experiencing Power Loss Thanks To Conservative ECU

Thoughts?

Wow, disappointing if you ask me..

It's not a big deal, a retune will fix that problem.

Okay, and that's great and all. But it just frustrates me that they are advertising this as the "most track capable corvette ever" and the first thing you need to do is tune it for continued performance?

Also I gotta wonder, how much of this was done to preserve the drivetrain?

It says "for emissions reasons". I wonder if it runs so rich you run the risk of drowning the cats in fuel as it tries to compensate for high IATs when you're on it at the track?

In which case, remove cats and retune :stirthepot:

My guess is they design and test it one way, and then realize it has to be neutered somewhat to fit under some of our more legislatively retarded *coughCaliforniacough* and there's some downstream effects.

Or, it's GM and this is why you never buy the first model year of an American car. :rofl2:

Idk what happened to my post? :confused:

First year of any car is usually a risk, but especially with this one. New powertrain, electronics, and god knows what else.

Wow...love the feedback from the link.

lol stupid chevy

I have a feeling that the first few times they get tuned……they blow up. Sounds like the IAT gets too high and they dial back the timing…….mess with that and boom. I bet you will need bigger intercoolers and high flow pumps in addition to the tune.

Very disappointing, as I was actually kind of liking the C7 with Z06/7 package.

Guess I'll save up my money for something else! :icon17:

i am very hesitant to buy first/second year models of a re-design/relaunch etc.

the whole thing about cutting power though... lol awk.

i mean you can re-tune it and all but why would i want to drop more money on a brand new 'track ready' car to dyno/tune it and remove the limiter?

that's a huge question mark as well. can the drive train even handle the power or are they dumming it down to preserve it and or other parts?

and as

I swear the original post was edited...

How many people in this thread complaining about it not being "track capable" have ever actually tracked? Just curious...

They did that on purpose for emissions and longevity purposes but GM says you can take it to an aftermarket tuner to extract more power at the expense of voiding the warranty. No big deal

:icon18:

Considering one test car blew a motor almost right away, probably a necessary de-tuning by Chevy.

Feh.

Yeah, cause the first year 370 was perfect...lol :stirthepot:

F-ing seriously...

Fixed.

One of our car club members is a GM at our local chevy dealer. He says that since all this info has come out people are cancelling their order on the Z06. He himself was going to trade in his 711hp 2008 Z06 but opted to just supercharge his current 2015 C7. Oh well, guess we'll see how chevy responds to all this

While there is a slight air of disappointment. Really, power is cut from 650hp to what? Maybe 550hp? I'm just guessing but the car is fast Azz for the price.

I wouldn't buy it yet as a first year model BUT power cutting isn't convincing me to dismiss it yet. And I wanna see it against a GT-R Nismo

From what I gathered in the Vette forums, a couple owners had their Z06 dynoed, and after 3 or 4 pulls were already losing between 20-30whp.

Here is what Vengeance Racing had to say-
"With the OE calibration we did experience the same thing... The timing tables are EXTREMELY conservative and the ECU will pull timing for almost any situation. I am waiting for owners to complain about "tip in" as the ECU pulls a massive amount of timing when slightly touching the gas pedal.

All that being said, MOST of the loss of power can be addressed in the ECU.. IAT2 temps are actually quite impressive, even after multiple pulls on the chassis dyno. We will get on the highway in the next couple of days and make some back to back "multi gear" runs for comparison sake."

I'm sure a few will get blown up by Tuners, then the owners will want GM to warranty them.......then we will get a bitchfest on the Vette forums.

Install an oil cooler?

Or have an oil cooler on their own car realizing that a couple laps in the Z will lead to limp mode, which is worse than "cutting power"? Hah can't knock this car for a power loss if we can't even do a track day without limping back to the pit without an oil cooler! A lot of cars have some sort of inherent weak point that needs to be addressed for consistent, reliable track use.

Yeeeeup. Bench racers bitch about this, and that's about it. There are almost no true, 100% track capable cars from the factory. Everything has some thing I'd want to change. Z/28 is a good example: amazing car....with horrendously expensive brakes, that I'd immediately swap over to traditional rotors/pads.

I wonder what the tradeoff would be with the brakes though? Are they THAT amazing that you wouldn't have to worry about replacing/warping them as often as traditional brakes? I can see what you mean though... if I had to replace carbon ceramics I'd cry.

With a CAI, pulley and tune this Z06 made 660whp/663wtq. Pretty dang impressive.

Agreed, but how long can it do that....if the tuner gets it too lean or heat soak happens?

Go ask the Porsche guys what happen to their expensive carbon brakes after one track day, they will tell you it was an expensive $4000 mistake. After one day!!!

^^^^^^

One of my mechanics does the brakes on Porsche's for track prepping. EVERY YEAR, they need a new set of calipers.

Step 1 for them? Replace the rotors and pads away from that carbon fiber crap.

The trade-off is you save a ton of money, and for people who really race, that is (almost) all that matters lol.

My only issue was seeing one run the 1/4 mile and only trapped 120 mph. That's considerably slower than the previous c6z06 which was in the mid to high 120s

are you talking about his run here?

Love reading the comments on that ****. As if this was some kind of perfect launch/run for this car, so it must be the bar.

Oh
My
Goodness
!!!!!

Sick....

Yes

doesn't matter if he didn't have a good launch. Trap speed is a representation of power/weight. but maybe he lifted who knows

120 is not impressive. I've seen stock c6 z06 trap 128-130...but then again it weighed 3150...not 3524

It's been tested by C&D with a 127mph trap speed I believe, so yes, I'm guessing he let off.

And we have a winner!
This 2015 Corvette Z06 had 891 miles when the engine grenaded

At least it isnt lighting on fire?