vipervetteguy

GM claims 196 for a bone stock Z, if I remember correctly. I know that the additional 4 mph tp 200mph requires more than a few more hp, but I'm curios how much do you think a Z needs to make 200. My 496 rwhp translates to maybe 583 crank using the "accepted" 15% loss. Do you think that's enough to claim the car can do 200......since I won't be confirming that on a road somewhere? Its sort of like a guy who can bench 225 15 times claims he can do 300 even though he's not actually done it.....

UTVOL06

GM claims 198mph for the stock C6 Z06. I think your car would easily do 200mph!

robvuk

It has been said here in the past that you could probably reach 200 by folding in your mirrors. I don't think the 196 is an absolute number and I believe that there have been a few documented 200mph runs bone stock or with intake. A slight breeze from behind will put you over.

jogar80

I remember seein a few guys on here posting 200 mph or better completely stock. Just depends on the conditions I guess. Or maybe most are capable of 200 mph but GM decided to play it safe?

Bills Z06

I think yor car should easily put you over 200. If you ever get the chance to try (on an airport or some open road event) let us know.

JJMalone

Looking at my ECU with LS2 edit, top speed is computer limited to 205mph. I’ve seen posts on other forums of Zs going this fast backed up by in car GPS pictures. They claimed stock. Under ideal conditions I believe the Z capable of this. 205mph in 5th comes out to a little over 6500rpm without taking a some wheel spin into account.
JJ

ayousef

got 205 mph on a stock z06, with bad weather and two passengers =)

right and my car dynoed 440 RWHP, close to 500 RWHP ur car will EASILY go above this number.

Frenchican

In stock form, my Z struggled to get to near 200. But, there was a bit of a cross/head wind at the time. After the Katech install, over 200 was pretty easy.

What I would give to have a 5 mile runway to see what she'll top out at.

Zivnuska

Car and Driver got 207mph stock.

GMuffley

Many variables will affect top-end performance: temperature, humidity, wind speed, road surface, tire pressure weight of passengers, whether the car is lowered or stock ride height, etc. While a stock Z06 may hit 200 mph on a 70 degree day with perfect conditions in Nevada, the same car would be several mph slower in a hot,humid day in Florida.

355Spider

Add a ram air like the air charger and you'll definately get closer easier. My car did 0-185 12 seconds faster than a stock car with headers, tunes, filter and air charger. I think the air charger really helps at higher speeds. Stock cars slow down in 5th above 160. Mine rampages past 180.

Gary2KC5

In this cosmos aero is as important as power...if the mags say stock 207 I think your covered as far as bragging rights go

kevettez06

i got mine up to 195 effortlessly then i chickened out cus it was like 2 in the morning and the last thing i needed then was to get pulled over for those kind of speeds :x

raj

Theoretically, to a first order, HP required scales as the cube of velocity, so if a 505 hp Z06 does 198 mph, 200 mph should require:
505*(200/198)^3 = 520.5 hp, aero being the same. That's roughly a 3.1% increase in HP required for a 1% increase of top speed; certainly a Halltech tuned Z with no other mods would be a likely candidate to breach the magical mark.

Equivalently, shifting the HP peak up by a mere 100 rpm should also do the trick since top speed is attained with the LS7 at peak HP. This may be trickier to achieve, or prove for that matter, though.

Halltech

The Z06 with the Halltech Killer Bee Package is definately a 200+ mph car. Trust me when I say that.

Now set up the motor with the Katech Street Attack Package, http://www.katechengines.com/street_...vetteC6Z06.php ; which is now rated 612 HP with the Killer Bee AAIS, and you should see 205 to 206 mph. (Raj can do the math)

One more bump with Katech's Track attack package, sporting 637 HP, also now with the Killer Bee AAIS, and things start to move a couple more mph.

Another key element here is downforce and lift. There are some really nice products that Katech has been testing to keep downforce at a max, from spoilers to rear wings, and now vented hoods.

Jim

Halltech

I would like to see that article. Haven't seen official numbers that high. 206 unofficially.

Congaman

Last year I run 206 mph with my stock Z06 according to GPS (Garmin Nuvi). At first I thought something was wrong with the GPS but after testing it proved to be OK.

The run was made on the A1 in Germany early sunday morning. Almost no traffic and cool morning air. I hope to be able to do another top speed run this season as well. If I do I'll promise to catch the run on video. At the moment I'm having discussions with RussRamz over at M5board.com about arranging a top speed run on the A5 between his Kellners M6 and my Halltech tuned Z06. I think this run would be interesting for many reasons. It will show the acctual top speed of my Z06 with Halltech tune and KB. But - I think - also that the Kellners M6 will be able to walk away from me when I hit 5th gear. The only thing that could keep me away from this run is my busy work schedule. Stay tuned for more details.

ayousef

the m6 will NOT go over 330 Kph why? its gear limited. At 500 HP the car would hit its rev limiter in 7th gear at 330 KPH.

Halltech

First of all, I watched the video of you vs. RussRamz. You won, hands down, and pulled him in every gear. It looks like you either missed fifth gear, or let of the throttle at the end of the runway.

Second. Your car must have a superior power/weight ratio in order to pull him as you did in every gear. 5th gear is an overdrive gear, but unless your drag coefficient is worse than his, there is no way his car would suddenly pick up acceleration on your car at 200+ mph.

You make us proud Congaman. Keep up the good work, but drive carefully, and I would keep those speeds only to the track.

The Z06 has a Cd of .34, the M6 .32, so they have an advantage at high speed.

The big problem for the Z06 is the big mouth. The older C5 Z06 had a drag coefficient of .26

Here is what I do not understand. The M6 has a factory rating of 500 HP in a 4,000 lb car. The factory shows a top speed of 155 mph.

Imagine how much HP the Kellener's M6 must have to exceed 206 mph as they claim.

Raj could estimate the power needed to put that car over 200 mph.

Stock the M6 has a power/weight ratio at 10lbs/hp. The Z06 is 6.26lbs/hp. Your car now has a p/w of around 5.54lbs/hp. The M6, with its obesity problem (2 tons of metal) would have to have 722 HP just to stay even with you in acceleration. 4000/772= 5.54 lbs/hp.

Have you ever looked under the Kellener's hood at their twin turbo system?

If you both have the same power to weight ratio, then the lower Cd, and better gearing will prevail at top speed.

Jim

Hatdude

For those in Florida's defense, dodging all the blue-hair driven Buicks slows you down a bit.