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Old 03-11-2012, 06:28 PM   #1 (permalink)
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420 hp Cobra replica vs stock Z06

Interesting video for those that think 400 hp is fast in our cars. Testing was on a private airstrip.
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Old 03-11-2012, 06:42 PM   #2 (permalink)
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Interesting, but I don't think the video really proves much of anything. I can't even tell for sure if the guy in the Cobra is really even trying to race. The right Cobra can hold it's own in the 1/4 mile.. Top end might be a different story.. A Z06 needs to pick on a car its own size, like a FFR GTM!

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Old 03-11-2012, 07:28 PM   #3 (permalink)
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420 hp in a Cobra Vs 500+ in a slippery Vette? No question at all about who's going to walk away from who on a top end run.

Now Thomas' car Vs the Vette, that I'd like to see!
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Old 03-11-2012, 07:35 PM   #4 (permalink)
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Heres another for the YouTube fans out there. This time its a ZR-1 vs AC Cobra, little different results.

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Old 03-11-2012, 10:22 PM   #5 (permalink)
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Thomas, that video doesnt make any sense. The guy cant drive or shift or both. A C6 Z06 and 400 hp cobra should be dead close.
My car is about the same hp as the C6 Z06 with 850 less lbs and much more drag. When Im at the track, I pull 5-8 lengths on the Z06 from 50-100, then they gain back about 4-5 from 120-150. So, 450hp should be dead even to at least 100, maybe 120.
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Old 03-11-2012, 10:59 PM   #6 (permalink)
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Its easy to win a race the other guy doesn't know he is in. I used to win all the traffic light races back in the day with my Toyota minivan!

If anything, looks like the guy played along a little then gave up. Many guys with lots of horses only use just a few.
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Old 03-12-2012, 12:41 AM   #7 (permalink)
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The new Corvettes are really really tough to beat, especially on a big road course. They are very sophisticated - engine, suspension, computer controls, aerodynamics. I have ridden in one around the track, and they make my suspension feel like a buck board

I can take most 'Vettes on a short course. But on a big course they just walk away from me at the top end. I could improve on that by changing the rear end gearing; but then I change it's street manners.

And there's lots more to "racing" than a simple HP number. 400hp - calculated? Guesstimated? Truly measured? Hard to say.

2 guys in an open car without helmets or safety gear. One guy has his arm hanging over the door. Racing? Again, hard to say.

In that situation, I would definatly NOT be driving 10/10; probably more like 6-7/10. With helmets, 5 point harness, arm restraints, and a full width roll bar, I never drive more than 8/10 with a passenger.
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Old 03-12-2012, 01:08 AM   #8 (permalink)
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Thomas, that video doesnt make any sense. The guy cant drive or shift or both. A C6 Z06 and 400 hp cobra should be dead close.
My car is about the same hp as the C6 Z06 with 850 less lbs and much more drag. When Im at the track, I pull 5-8 lengths on the Z06 from 50-100, then they gain back about 4-5 from 120-150. So, 450hp should be dead even to at least 100, maybe 120.
Trevor, I think there are a few factors at work here.
1: That Cobra may not be as light as you think, I bet yours is much lighter.
2: Each car has 2 people in it which helps the Vette.
3: 420 hp doesn't take into account how restrictive his exhaust may be. His actual rwhp may not be so great.
4: Some transmissions don't shift too quickly, his may be one of them.
5: No doubt the higher the speed the aerodynamics become horrific for the Cobra.

My neighbor up the street swears his Z06 weighs under 3100 lbs, whether that's true I don't know. I do know they can run 11's at 124 mph depending upon which test you go by. Their top end of 198 mph speaks volumes.
That same Cobra in the video I posted also raced a modified Porsche and lost just as badly, if not worse, to the Porsche. The modified Porsche also beat the Z06 but just barely.
It's all posted on youtube. Cheers.
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Old 03-12-2012, 04:54 PM   #9 (permalink)
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I would like to give him a try, I may even give him 8 car lengths just to make it fair.
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Old 03-12-2012, 05:21 PM   #10 (permalink)
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The first video to me is a little flawed,
Cobra doesn't look like its racing.

Secondly, that could be a heavy replica (2700 lbs vs maybe 2300lbs in an FFR)

Thirdly. The cobra has a passenger, a 200lb weight penalty right there.

With the weight penalty, the cars probably are close to same weight, but cobra is well down in horsepower and aerodynamics as also mentioned.
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Old 03-12-2012, 05:55 PM   #11 (permalink)
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2fastcobra,
Before I put my money down,which car are you giving a 8 car lenght & how long of a race?
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Old 03-12-2012, 06:02 PM   #12 (permalink)
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I find it hard to believe, as said above, that the Cobra was really trying to race. The Z06 guy was definitely trying but the roadster guys look very laid back. It could have been a real bad video if they really got on it hard tried given their complete lack of safety equipment.
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Old 03-12-2012, 11:29 PM   #13 (permalink)
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I think the 30mph rolling start really hurts the Cobra in this contest - or at least takes away most of its lightweight advantage at the start and probably doesn't do it any favors with shift points vs. the Z06.

The Cobra with only 420hp really needs to be able to get more of a lead before the lack of aero kicks in at the higher speeds. The Z06 really gets the advantage quickly as the speed climbs. Those Z06's are really strong.
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Old 03-13-2012, 01:42 PM   #14 (permalink)
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{ 2fastcobra,
Before I put my money down,which car are you giving a 8 car lenght & how long of a race? } ---- The ZO6 0-150mph!!!! ----
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Old 03-13-2012, 02:43 PM   #15 (permalink)
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I would like to give him a try, I may even give him 8 car lengths just to make it fair.
You just can't help yourself, can you?
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Old 03-13-2012, 03:51 PM   #16 (permalink)
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My neighbor up the street swears his Z06 weighs under 3100 lbs, whether that's true I don't know.
Thomas
Well, depends what he has in the car or not. Unload the spare and get rid of carpet and heavy stock seats - he is right on 3100 pounds curb weight.

The new Vette is lean, the power to weight ratio to put he besting the Ferrari F430 and Porsche GT3 RS! With a 420HP (mostly rated on the crank) Cobra you will loose...
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Old 03-14-2012, 01:32 AM   #17 (permalink)
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Well, depends what he has in the car or not. Unload the spare and get rid of carpet and heavy stock seats - he is right on 3100 pounds curb weight.

The new Vette is lean, the power to weight ratio to put he besting the Ferrari F430 and Porsche GT3 RS! With a 420HP (mostly rated on the crank) Cobra you will loose...
Corvettes don't have spare tires...
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Old 03-14-2012, 03:50 PM   #18 (permalink)
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Corvettes don't have spare tires...
And we do???
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Old 03-14-2012, 04:25 PM   #19 (permalink)
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They had a 30mph rolling start, so I figure they were probably running 120+mph, after the 8-9 seconds from when they punched it, to when the Cobra started dropping back. Not unheard of that our front ends can get pretty light at those speeds. It appears he started to back out at that point, while the Vette stayed on it. Doesn't prove much..

Be interesting to see a similarly powered Daytona Coupe do the same run.

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Old 03-14-2012, 07:24 PM   #20 (permalink)
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Don't know what kind of gears the Cobra is running, but Z06's are pretty formidable on the roll - at least to the top of 4th gear (157mph).

I've surprised guys in modded this and that with my Z.

60-130mph times are in the high 7's.

Always someone faster.

When my body is on and suspension dialed in, a couple of buddies and I are going to do some runs w/ video to show the relative speed of some of our 'fast' cars. Roll runs from 40mph most likely.

X5M (555bhp) vs 450whp Z06
Z06 vs 480bhp Factory Five
Z06 vs 625whp Ford GT
Ford GT vs 820whp Porsche GT2
GT2 vs 1300whp (yes) Gallardo TT

Should be interesting.
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Old 03-15-2012, 12:17 AM   #21 (permalink)
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geez, how does the porsche GT2 get to 800+whp? did the guy add turbos
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Old 03-15-2012, 02:19 AM   #22 (permalink)
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geez, how does the porsche GT2 get to 800+whp? did the guy add turbos
The GT2 is a factory TT car.
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Old 03-15-2012, 02:20 AM   #23 (permalink)
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And we do???
Just pointing out the obvious.
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Old 03-16-2012, 01:05 AM   #24 (permalink)
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JonB is correct. TT stock. GT2's are same drivetrain as the more common 996TT's, except they are RWD only.

Quote:
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geez, how does the porsche GT2 get to 800+whp? did the guy add turbos
Eric's GT2 has built engine, bigger turbo's/fuel system, etc...and runs C16 to get to that power level. 60-130mph in 4.95 sec.

Runs 600whp or so on pump.

Here's a pic of it:
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