sunsalem

Sorry, I was trying to make a joke there.

OK, got ya.

ZoratZ06

I think the ZR1 will likely just barely crack the 7min mark...6:59xx at the ring...

For those expecting more from it...the question is, what were you expecting? The C4 ZR1 looked just like the regular C4, so did the C6 ZR1....other than a few fancy parts the avg person would have no idea. So why should the C7 ZR1 be any different?

It has always been more of a balanced car than a track car...this time they made the track variant to correct the perceived wrongs of the C7Z (i.e. track issues).

Lastly...I have a hard time believing the GT2 RS time...I can't wait for the ZR1 and GT2RS head to head at MRLS...and I have a feeling the ZR1 will be on it's bumper maybe even ahead of it...yet at the Ring the GT2RS ring time was blisteringly fast...typical Porsche 'massaging.'

I like the new ZR1...still the performance value of the century. Mid 10's at the strip (maybe even 9.9 on a tire), super fast on the track, comfortable, reasonable gas mileage and all for under $140k (likely). What else even comes close?

johnglenntwo

If a Vette with far fewer of everything gets in the mix!?Again!

Ifweonlyknew

Superharged again? Why can't they get that power from a N/A V8

Stingray23

I dont believe any numbers Porsche or Ferrari puts out.

grcor

I have heard Tadge talk about this on Autoline. When they started the C7 they did some N/A engine development, but they could not reach the horsepower goals and still meet emission and gas mileage requirements.

If you look at most other sport cars, the trend is to smaller displacement turbocharged engines.

Ifweonlyknew

Why?

Warp Factor

Emissions, probably. With a blower, they can get it to breathe without needing a big dirty cam, or turning the engine as fast as it would otherwise take to pump that much air.

Ifweonlyknew

There was so much talk and rumor about this engine being DOHC

Ifweonlyknew

Why didn't they make it a DOHC? There was so much talk about it.

3 Z06ZR1

Plus your MPG would not be the great MPG we enjoy. Supercharging is the way to go.

grcor

A DOHC can be N/A or turbocharged or supercharged. I know some people on this forum like supercharging, but it adds a lots of weight and its parasitic load hurts gas mileage. So then the Corvette engines where forced into adding cylinder deactivation which added 80 to 90 pounds. That's part of the reason why the C7 Z06 and ZR1 are overweight. Turbocharging is a much better way to go and that is trend your seeing in most cars and trucks.

Warp Factor

A couple of things going on with that. The pushrod engine is a much more compact design than an overhead cam. Have you seen the Ford overhead cam V8's side by side with the LS or LT GM? The Ford is huge in comparison, probably wouldn't fit under the Corvette hood.

Overhead cams have their main advantage on higher-rpm engines. On an engine with a displacement as large as the LT4, one doesn't want to spin them so fast that piston speed (and the distance the pistons and rings travel per minute) goes above a certain level, because the wear gets really high for an engine with a warranty. It's fine though for an engine which will be torn down and refreshed periodically. All-out race engines only need to survive the distance of one race. OEM engines need to work to a different set of standards.

JerriVette

Porsche 911 turbo s 580 hp 518 tq weighs 3527
Corvette z06 650 hp 650 tq weights 3524

How is the corvette overweight?

I believe the ZR1 is supposed to have 750 hp, 680 tq weighing an extra 140 lbs...

So 211 mph top speed ZR1 could weigh in at 3664 lbs..

That gigantic wing probably weighs 70 lbs...(kidding) ...

TrackAire

I agree with you on the turbocharging aspect....I was hoping to see a twin turbo motor on this thing.

The problem with big displacement motors is the emissions during cold start up. Until the unit heats up and the cats fire off, most of the harmful pollutants are happening the first 2 or 3 minutes. Once any modern engine heats up, they put out very little in the form of harmful emissions.

Amazingly the naturally aspirated V10 Viper motor is certified as a low emissions motor but it will not pass future cold start up emissions. The future will be very small V8's and V6's that are force injected to get the power when needed.

Warp Factor

Cylinder deactivation adds 80 to 90 pounds? That sounds a bit absurd to me. How did you come up with that number?
While I agree that turbocharging can be more efficient, I haven't seen any evidence that it provides some kind of across-the-board weight reduction. I'm willing to learn though, if you can provide the evidence.

thegame

To be fair the 911 Turbo has AWD which adds a decent amount of weight. What's the vettes excuse?

TARANTULA

The 911 Turbo its a GT car not a track car.

Kappa

If you think the LT5 is going to be the LT4 with just a bigger blower, I think you have another thing coming...

Snorman

FWIW...my ACR-E is about 3470# with a full load of fuel. Such a failure as a track car, lol.
S.