I thought corvettes would do 186 mph stock off the showroom? So I did some internet research, and found the stock "Coupe" to top out in the mid 170's. Here is a cool chart I found. I may not come out like the web site. But the last numbers on the right are TOP SPEED.


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YEAR ENGINE 53-71 gross
1972-2000 SAE net
cubic inches/ hp Engine $$ Option Cost Production 0 - 60 Time 1/4 Mile Time 1/4 Mile Speed
Top Speed
1953 235/150 -0- 300 105
1954 235/155 -0- 3,640 11.0 106
1955 265/195 135 650 8.7 117
1956 265/225 2x4 172 3,080 7.3 89 129
1957 283/283 FI 481 856 5.7 14.3 96 132
1958 283/290 FI 484 1,007
1959 283/290 FI 484 745 6.6 128
1960 283/290 FI 484 859
1961 283/315 FI 484 1,462 6.0 14.9 99 140
1962 327/360 FI 484 1,918 5.9 13.8 105.1 142
1963 327/360 FI 431 2,610 5.6 14.1 102 151
1964 327/375 FI 538 1,325
1965 396/425 L78 292 2,157 4.8 150
1966 427/425 L72 313 5,258 5.6 12.8 112.0 135
1966 427/390 L36 182 5,116
1967 427/435 L71 3X2 437 3,754 13.8 108.0
1967 427/435 L89 369 16
1967 427/430 L88 948 20
1967 427/400 L68 306 2,101
1967 427/390 L36 200 3,832
1968 427/435 L71 437 2,898 13.3 108.0
1968 427/435 L89 806 624
1968 427/430 L88 948 80
1968 427/400 L68 306 1,932
1968 427/390 L36 221 10,531
1969 427/435 L71 437 2,722 6.1 122
1969 427/435 L89 832 390
1969 427/430 L88 1,032 116 13.5 111.1
1969 427/400 L68 327 2,072
1969 427/390 L36 200 7,717
1970 454/390 LS5 290 4,473 7.0 144
1970 350/370 LT1 448 1,287
1971 454/425 LS6 1,221 188 13.7 102.0
1971 454/365 LS5 295 5,097
1971 350/330 LT1 483 1,949
1972 454/270 LS5 295 3,913
1972 350/255 LT1 483 1,741
1973 454/275 LS4 250 4,412 7.2 124
1974 454/270 LS4 250 3,494
1975 350/205 L82 336 2,372
1976 350/210 L82 481 5,720 8.1 132
1977 350/210 L82 495 6,148 6.8 132
1978 350/220 L82 525 12,739
1979 350/225 L82 565 14,516 6.6 132
1980 350/230 L82 595 5,069
1981 350/190 L81 -0- 40,606 7.9 16.0 85 125
1982 350/200 -0- 25,407
1984 350/205 -0- 51,547 6.7 142
1985 350/230 L98 -0- 39,729 6.6 149
1986 350/250 -0- 27,794
1987 350/240 -0- 30,632 6.3 150
1988 350/245 -0- 22,789
1989 350/245 -0- 26,412
1990 350/250 L98 -0- 20,646 6.6 15.0 95
1990 350/375 LT5 ZR1 27,016 3,049 4.7 12.8 113.8 181
1991 350/375 LT5 ZR1 31,683 2,044
1992 350/375 LT5 ZR1 31,683 502
1993 350/405 LT5 ZR1 31,683 448
1994 350/405 LT5 ZR1 31,258
1995 350/405 LT5 ZR1
1996 350/330 LT4 GS 13.7 105.1
1997 350/345 LS1 -0- 9752 ? 5.0 13.2 109.3 172/164 conv
1998 350/345 LS1 -0- 31084 5.0 13.2 109.3 172 /164 conv 1999 350/345 LS1 -0- 5.0 13.2 109.3 172 /164 conv
2000 350/345 LS1 -0- 5.0 13.2 109.3 172 /164 conv

 

I'm gonna try topspeed again this summer.
Last summer i drove thru Germany with my STOCK 99 coupe, and it maxed out on 275 kmh. This was measured several times on the gps!
This was on the 5 gear and when i tried the 6th gear it slowed down.
Now i have TT installed and i raised the programmed speed limiter in the ecu to 250mph/402kmh. It was originally set at 200mph. Not that i expect to go much faster than 200mph, but i didn't want a limiter there at all!
I haven't heard of a cooling problem with the 6th gear, so it will be a thrill to see how it goes. Has anyone really experienced a 6th breakdown at these speeds??

BTW i had 313kmh on the speedo on a Honda CBR1100xx Super Blacbird some years ago

Conversion mph-kmh is 1,609

Roger

 

Many people ask me what is my car's top speed and I never know what to say. I just tell them that I reached 186 easy and that the car is capable of more!
Anyone know what a supercharged C5 with a 3.15 diff could do? Is 200 possible or am I dreaming?

 

Hey, don't worry about tires nor gears. He asked about spraying nitrous for several minutes. That should be enough to shut him down before the tires and gears let go...

 

I got up to 200 mph in just over a mile in my TT with the boost turned up - it got there VERY QUICKLY. I have just under 700 rwhp. To get to 200 mph in a vette, high 500s rwhp will get you there, but it'll take a while. Just look at a stock Z06, it almost gets there with mid 400s rwhp. Sheesh, a 400 hp crank ZR-1 will get to 180 mph! Just takes a few miles! My 575 rwhp ZR-1 gets to 200, but takes around 2 miles to do so.

 

I did it in 5th, but my redline is 6700 rpm.

 

Jesus!!! 200 mph in under a mile!!!
That's scary fast! I guess I really gotta save for a new motor/blower combo!

 

yep, same thing i experienced in my z06

non z06s are different because of the different tranny

 

This has been an interesting thread BUT my original question was; Can you run several minutes of nitrous? and what would it cost to do so? Would a nitrous boost give me 525 at the crank?

Regarding 6th gear, we are talking about going from 180 to 201 in 6th which might take, what a minute or two?

 

Well you can try the minute or two of nitrous, but yeah, no, that's not going to happen! You will fry that thing. You need either N/A HP or FI HP to make that run, not nitrous. As for the 525 at the crank, yeah, nitrous can do that, but no, that number wouldn't even be enough to get you to the 200 mark. We were all talking about having about 550 HP before but that was at the rear wheels, which is about 650 at the crank with a 15% loss threw the driveline.

 

How about that 6th gear being fried?
I don't mean to hijack here, but it has been mentioned...
Has anyone actually destroyed their 6th gear during highspeed run??

Roger

 

I don't think there's any more problem with running nitrous for several minutes than there would be with a blower or turbo. Same precautions with rich AF, and all the safety stuff on the nitrous.
Guys do it on boats. You might go through a couple of bottles depending on power level. Bottle pressure will probably drop during the run as the bottles cool from vaporizing nitrous.
525 at the crank? I think you can go a good deal higher than that with nitrous (not sure at what power level you'd be injecting more than the motor can ingest and it vents out the air cleaner). You're talking about a forged motor that's set up to handle that much power, right?
I don't know how much heat you can put in there before the stock ring end gaps butt and score the cylinder walls.

 

The easiest way to hit 200 mph is in a 6 speed coupe. First, because of the aero advantage, and second, because of the ratios of the MN6 trans vs. that of the M12 trans. I think a 6spd coupe with a 3.15 rear would help even more, though it would take longer to get there. I think if you took a big cube TT motor (LPE 427 for example) in a coupe, with a 2.73 rear end, you'd get a theoretical scary number. I'm sure some math wiz here can figure out that a MN6 trans, with a 2.73 rear, at say, 6700 rpm would net you XXX speed.

LPE is very smart about the top speed shoot outs. Not only do they change the rear end ratio, they also run narrower tires to reduce drag at high speeds. Perhaps something like a 225 width up front, and a 245 width in the rear. Also, get the car as low as possible. Air under the car at 200 mph is bad.

 

I've seen several different figures on the top speed of a 405 hp z06, from 171-188. I'm lowered an inch so I took a mid range base of 180, so I need enough power to go 20 miles per hour more. Which at that speed takes a lot of horsepower. The new Z06 is rated at 198 with 505HP. So I figured with 525 at the crank I'd be there easlily. I would imagine with lowering and taping body joints and blocking brake vents and reducing the cooling hole in front the 505hp Z06 would do 200.

Several posts have mentioned blowing my motor if I ran nitrous for a couple of minutes. Is there something in the physics of nitrous that puts an unusual strain on a motor or is it just power. I'm under the impression that a stock Z06 engine can hold 525 crank pretty well.

Funny coincidence happened today. I've got a rental house that became empty yesterday and I was in the house today. I found a NO2 bottle in the garage that is as big as a scuba diving tank which is what I thought it was at first.

 

Interesting thread!

 

What we've been saying is that a stock Z06 will redline in 5th before you hit 200. If you want to try pulling in 6th than you'll need substantially more power. Your best bet would be to swap to a 3.15 rear, and I'd stay conservative on the spray. 100shot might be able to get you there, if not, well pill it up!

 

no its not gonna happen

 

Your actually better with more weight in your car at higher speeds like that I got up to 180 in my m5 before I chickened out because I felt like I was floating on air. That's what it feels like. Floating and you know for sure if you turn the wheel real hard you will continue in the direction you are already going. The aerodynamics of the vette are to it's advantage but the weight is not you have to be extra careful.

 

I've got a ACI front spoiler and I'm trying to find a "functional" rear spoiler that does not look like poop. I think I'm ok on aerodynamics.

 

I drove my car the other day and noted the RPM difference between 5th and 6th. It is approx. 800 RPM. So redlineing in 5th at 6500, shifting to 6th would be 5700 RPM. According to one dyno sheet I refered to that would be only be a 35 HP drop. So if it took every ounce of HP to redline in 5th the car would slow down when shifted to 6th. But if the car was still accelerating in 5th it might still accellerate in 6th, especially if the engine was producing more power than stock.

I watched a TV show about developing the C6. They had a mule on the autobahn doing an honest 180 and the car handled well. The 2002 Z06 has more power than the C6 ( I think perhaps more than what would be 5 ) so I'd think that 185 or so might be the top speed of a stock 2002 Z06. I'd bet with lowering, taping body joints, blocking the brake ducts, and reducing the cooling scoop the stock C5 Z06 might hit 190 if the gearing permits.