You know that the z06 does good numbers for 0-60 and 1/4 mile,
however the top speed is not that amazing. Even the regular C5 does
175mph. So GM did not do a good job for z06. The Ratio of gears should have
been modified to take the z06 to 185mph, since it has the horsepower to do it. Let's see if the new Z06 C6 could top 200mph, and I hope it does to shut
the mouth of the benz amg and bmw m owners. :boxing

 

zak,

You have a trade off when choosing gear ratios .... top speed versus acceleration. For the Z06, Chevy chose a set of ratios that provide the car with better acceleration in the speed ranges most of us will be using it. Even on fast tracks like Willow Springs or Laguna Seca it is hard to get the car up to 130 before you have to brake for the next corner.

As far as the M Series and the AMG machines, both are electronically limited to a top speed of 155 MPH in the US. Don't know about Germany ... though the way I calculate it ... the M3 will reach 172 MPH in 5th gear (assuming it's got the horses to push it that fast !!) and the C32 AMG will top out at 171 ...... (also assuming it can reach max rpm in 5th, like the Z06, the AMG 6th gear is clearly to tall for other than fuel economy purposes)

So what are you worrying about ????????

 

Z06 does 174.
What is the big deal?
How much time do you spend at these speeds that a few MPH makes a difference?
I would rather have the gearing and stiffer structure when exiting a turn.

 

It will take more HP than the stock Vette has Z or C6 to reach 200 mph. I don't see the big deal with that milestone and I'm sure Chevy doesn't either. :nonod:

 

:iagree: You may opt to put some higher gears in your car that will see you well into the 180's and above. Chevy obviously geared the Z to perform better in acceleration speeds with a lower top end than the other way around. Suits me to a T. :)

 

Top speed is a bragging issue for people with little ........... GM did right it making the car faster in the usable ranges. :D

 

Top speed is a useless bragging right unless you live in an area where driving at 170+ MPH is legal.

 

:nopity

 

Absolutely.....................and just WHERE in the USA is that................? :sad:

 

:nopity :iagree:

 

:iagree:

 

I read something funny in the c6 forum......that only posted chevy numbers are acceptable. So, if chevy says its 171.....then it could not POSSIBLY go any faster. I made the claim that it was possible that the top speed of the c5 is 179-180MPH.....and all the c6 people went off on me....they said it couldn't possibly go that fast......so eveyone who says faster that 171 is a liar.... :troll

 

Like posted MPG figures by Chevy, each car may vary somewhat. You may achieve 2-5 MPG difference than what they show in their specs. But for the most part, on MPH, it should be awfully close. Keep in mind that the tires that come with the vehicle are speed rated and correct me if I'm wrong on this, but doesn't the onboard computer chip technology govern the speed to coincide with that rating? There's a liability issue for them to consider. :cheers:

(Note to self - buy a dang spell checker and prevent modified posts)


[Modified by Z_OH_6, 4:53 PM 1/14/2004]

 

Hi there Z_OH_6

You asked:

"Keep in mind that the tires that come with the vehicle are speed rated and correct me if I'm wrong on this, but doesn't the onboard computer chip technology govern the speed to coincide with that rating? "

Nope, 'cause the computer has no idea what tires are really on the car. If I put some el-cheapo non-speed rated tires (assuming I can find such a thing in Z06 sizes!) on the car and proceed to cruise at, say, 140 .... there is nothing the computer will do to stop me.

Now, as far as top speed, the Z06 in 5th gear (assuming stock tire sizes) can reach a max speed of about 171, and assuming it had horsepower enough to go faster, the rev limiter (6,500 RPM) will prevent you from going faster. The rev limiter is protecting the engine, not the tires.

Put the car in second gear, and no matter how hard you try, you can't go faster than about 70 MPH. The limit is the rev limit, and since we all have the same rev limit (6,500 RPM for the Z06) none of our cars will be "faster" than anothers. Speedo error might make one guy claim 71, while another claims 70, but within the tolerances of the mechanical drive train and electronic speed sensor, we will all be at the same speed. Again this is assuming stock tires, gears, etc.

Theoretically the Z06 can reach 195 (approx) in 6th before the rev limiter would prevent more speed, but the engine doesn't have enough horsepower in 6th to get the car to that speed (air resistance at those speeds is HUGE).

Given that the car can reach over 140 in 4th gear before the rev limiter kicks in, and that that speed on public roads will get you jail time in most parts of this country, I'd say we're driving one VERY fast car.

Steve


[Modified by BlackZ06, 2:36 PM 1/14/2004]

 

"Now, as far as top speed, the Z06 in 5th gear (assuming stock tire sizes) can reach a max speed of about 171, and assuming it had horsepower enough to go faster, the rev limiter (6,500 RPM) will prevent you from going faster. The rev limiter is protecting the engine, not the tires."

The Z06 is underrated I have personally taken it to 175 and it didnt peg the limiter, and I have heard it will do 176, and by my calculations it can do 176 at 6500.

"Theoretically the Z06 can reach 195 (approx) in 6th before the rev limiter would prevent more speed, but the engine doesn't have enough horsepower in 6th to get the car to that speed (air resistance at those speeds is HUGE)."

What are you talking about. In 6th theoretically with enough horsepower (around 1000 at the wheels) it could hit 265. We all know that will never happen it would become too light and fly off the ground, it would need to have much more advanced aerodynamics.

The best way to get a hugely powered Z06 to 200 plus is change the rear gear to 2.73 and top out in 5th, or change to 4.10 gear and top out at near the same speed in 6th which is around 220 with these gears. I know lingenfelter performance took a C5 too 226 but that is just dangerous.

 

I will probably get the lingenfelter 725hp deal. :cool:

BTW: It is very possible for the z06 to do 200 mph with 500hp just like
Ford GT 90 can.

 

Metallic311,

OOOOpppsss ... you're right, my math was off as I wrote that reply without any numbers in front of me ... I did it from memory (and that's why I said "about") thinking the car is turning 2000 RPM at 60 in 6th ... which works out to about 195, but of course the car is doing about 1500 RPM at 60, which works out to about 260 ... my mistake.

Where were you driving that you got the car to 175 ?????? :eek:

Steve

 

Not long time ago there was a story in this forum from a guy that has a C5 Coupe and he was coming from L.A to Vegas and in the desert he was doing 175 mph with an SL55 following him...... :rolleyes:

 

BlackZ06,

Hey didn't mean to sound like a stickler just wanted to get the correct numbers posted

Well I really shouldn't disclose where and when I hit 175.

However I will say that the first time I cheated, I went down a big hill to pick up the speed quickly, then went on the brakes slowly as to not upset the car after hitting 175, my target. The second time was actually on a very wide and long turn, very gradual like an oval track used for topping out, Again I hit 175, then slowed to 165 and kept it there for around 3 mins until I had to slow due to the road change. I'm sure this is the most stress my engine will ever experience 6000+ rpm for 3 mins straight.

My friend the passenger stongly believes I hit 185, from the distortion of looking at the speedo from the side, I didn't tell him that we were actually 10 shy of that

Anyway I truly believe the car can hit 176, cause it did not peg at 175, and I am inclined to believe those who said they have hit 176, hell just 1mph.

 

I thought that there was no limiter in 5th gear and so the top speed is regulated by the power you have in that gear and not by a rev limiter :confused: