[Z06] Top Speed
Drifting
Joined: Oct 2000
Posts: 1,396
Likes: 0
From: Sacramento CA
Keep in mind
198 was in perfect conditions with a pro driver on a very smooth track. Not real life results. With no aero mods would be a scary ride. Very few people know what it takes to hit 200(198)mph. It is not something you just go out and do. It also is one thing to go up and touch 200mph it is another run for any distance at those speeds.
Jeffy'
Jeffy'
Melting Slicks
Joined: Oct 2000
Posts: 3,368
Likes: 30
From: dfw Texas
I was going to ask a similar question. i know that with a 7200 rpm revlimiter my buddy hit 185mph in his 430 rwhp 01 Z0 and it was definalty not out of steam, but just not going to pull 6th. (.57 is just to steep) so my question is this. since the c5 coupe is geared to go past 200 mph in 5th, but not the z0 unless you rev it to something like 8800 rpm, at what point power wise can you pull 6th gear convincingly.. Has anyone rebuilt the tranny and put in a diffeent 6th? is it even possible to do a custom 6th gear ratio?
Melting Slicks
Joined: Oct 2000
Posts: 3,368
Likes: 30
From: dfw Texas
Le Mans Master
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
Can 6th physically hold the load it will take to accelerate with that gear? Even if the power to pull is there I heard that 6th gear would not be able to handle it.
Burning Brakes
Joined: Jan 2002
Posts: 1,242
Likes: 0
Despite what most people think due to GM's weasel words, the C5Z's c/d is effectively identical to the C6Z, and the C5Z's frontal area is less. Theoretically, the C5 version could be faster with the same power, but stability at speed would be the real issue.
Top speed differentials are increased by cube root of the power increase. So, if you want to increase top speed from 176 to 200, you'd have to increase power by about 47% by my quick calculations. If you take an average stock rwhp of 350, that works out to around 515 (not surprisingly).
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Instructor
Joined: Aug 2007
Posts: 120
Likes: 0
From: Minneapolis Suburbs MN
Claimed top speed was 176, iirc.
Despite what most people think due to GM's weasel words, the C5Z's c/d is effectively identical to the C6Z, and the C5Z's frontal area is less. Theoretically, the C5 version could be faster with the same power, but stability at speed would be the real issue.
Despite what most people think due to GM's weasel words, the C5Z's c/d is effectively identical to the C6Z, and the C5Z's frontal area is less. Theoretically, the C5 version could be faster with the same power, but stability at speed would be the real issue.
Safety Car
Joined: Jun 2006
Posts: 3,787
Likes: 2
From: Wildomar CA
Safety Car
Joined: Jun 2006
Posts: 3,787
Likes: 2
From: Wildomar CA
Claimed top speed was 176, iirc.
Despite what most people think due to GM's weasel words, the C5Z's c/d is effectively identical to the C6Z, and the C5Z's frontal area is less. Theoretically, the C5 version could be faster with the same power, but stability at speed would be the real issue.
Top speed differentials are increased by cube root of the power increase. So, if you want to increase top speed from 176 to 200, you'd have to increase power by about 47% by my quick calculations. If you take an average stock rwhp of 350, that works out to around 515 (not surprisingly).
Despite what most people think due to GM's weasel words, the C5Z's c/d is effectively identical to the C6Z, and the C5Z's frontal area is less. Theoretically, the C5 version could be faster with the same power, but stability at speed would be the real issue.
Top speed differentials are increased by cube root of the power increase. So, if you want to increase top speed from 176 to 200, you'd have to increase power by about 47% by my quick calculations. If you take an average stock rwhp of 350, that works out to around 515 (not surprisingly).
Last edited by Z06Electron; Sep 27, 2007 at 11:13 AM.
Safety Car
Joined: Jun 2006
Posts: 3,787
Likes: 2
From: Wildomar CA
just rebuild the m12 tranny with an m6 5th gear and voila, horspower for horsepower a c5z would out accelerate a c6z and have the same top speed. The C6z was designed with more downforce at those speeds though, the C5 tends to get "front light" at 200 mph. I've heard removing the back of the hood seal can help this as the air going up under the car has somewhere to escape rather than just pushing up on the hood, either way it's gonna need aero mods to handle right at 200 mph.
Last edited by Z06Electron; Sep 27, 2007 at 11:18 AM.
Safety Car
Joined: Jun 2006
Posts: 3,787
Likes: 2
From: Wildomar CA
More than likely a 1500 hp stock driveline C5 would explode in a massive fireball of death.
.No seriously it'll never happen.
Last edited by Z06Electron; Sep 27, 2007 at 03:55 PM.
Melting Slicks
Joined: Oct 2000
Posts: 3,368
Likes: 30
From: dfw Texas
if you replaced the 5th gear with the mn12s .75 5th.. could you adjust the speedo/ecu with ls1 edit? also, how stable is the coupe at those speeds VS the z06? the fast i have seen is 197.6 mph in my supra (gps verified) and it was pretty stable, but havent been over 185ish in a c5.
Safety Car
Joined: Jun 2006
Posts: 3,787
Likes: 2
From: Wildomar CA
My original idea had been to use 3.15 gears to level out the playing field, but 4th is always 1.00:1 so with 3.15 gears it would be weaker gearing than a c6z in fourth, but better in every other gear.
Changing out just fifth would give you a gearing advantage over a c6z in 1st, 2nd, and 3rd, and in 4th and 5th it would be tied gearing wise.
Assuming both cars had the same horsepower. Same advantage would apply over a normal c5 since they have the same tranny ratios as the c6's and c6z's.
Really I think a C5z with a different fifth, would be the ideal corvette tranny rear end ratios. then you could add a c6 6th and get better gas mileage too.
Last edited by Z06Electron; Sep 27, 2007 at 02:16 PM.
Safety Car
Joined: Jun 2006
Posts: 3,787
Likes: 2
From: Wildomar CA
Safety Car
Joined: Apr 2000
Posts: 4,326
Likes: 140
From: Weatherford, TX
According to a simulation I have, similar to desktop dyno, a C5 Z06 with approx 700bhp would perform like this:
27 seconds to reach 187mph: this is one mile flat out
at 40 seconds it will reach 200mph
at 60 seconds it will reach 210mph
top speed is estimated 220mph
I ran the numbers to get 250mph, it required about 1000hp. Right about what that Veyron has, so I think it's reasonably accurate. I would love to have a place to try it, that isn't covered in salt... Anyone know an event that does this type of thing?
27 seconds to reach 187mph: this is one mile flat out
at 40 seconds it will reach 200mph
at 60 seconds it will reach 210mph
top speed is estimated 220mph
I ran the numbers to get 250mph, it required about 1000hp. Right about what that Veyron has, so I think it's reasonably accurate. I would love to have a place to try it, that isn't covered in salt... Anyone know an event that does this type of thing?
Pro
Joined: Jul 2007
Posts: 535
Likes: 1
From: San Diego CA
yay-ugh
