200 Mph
Race Director
Joined: May 2007
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From: Out of Site...Out of Mind. Corvette: anything else is just transportation.
St. Jude Donor '09 thru '20
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Le Mans Master
Joined: Nov 2005
Posts: 5,451
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From: East Peoria Illinois
Thread Starter
Le Mans Master
Joined: Nov 2005
Posts: 5,451
Likes: 2
From: East Peoria Illinois
when I did 180 before I felt major lift on the front, but that was before lowering ans suspension I have done
Le Mans Master
Joined: Mar 2002
Posts: 5,955
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From: PNW
200 MPH possible with 453 RWHP. This equates to approx 532 crank HP.
Qualifier - you would have to re-gear to optimize the use of the RWHP. If you didn't re-gear, it would take much more than 453 RWHP to go 200 MPH. 453 would be the least amount of HP needed if gearing, air conditions and traction were absolutely perfect.
Last edited by ZeeOSix; Dec 23, 2008 at 11:02 PM.
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Le Mans Master
Joined: Nov 2005
Posts: 5,451
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From: East Peoria Illinois
Since this thread is back from the dead, I'll tell you what the handy-dandy program says it would take for a C5 to go 200 MPH ... based solely on the required RWHP to overcome aerodrag and rolling resistance.
200 MPH possible with 453 RWHP. This equates to approx 532 crank HP.
Qualifier - you would have to re-gear to optimize the use of the RWHP. If you didn't re-gear, it would take much more than 453 RWHP to go 200 MPH. 453 would be the least amount of HP needed if gearing, air conditions and traction were absolutely perfect.
200 MPH possible with 453 RWHP. This equates to approx 532 crank HP.
Qualifier - you would have to re-gear to optimize the use of the RWHP. If you didn't re-gear, it would take much more than 453 RWHP to go 200 MPH. 453 would be the least amount of HP needed if gearing, air conditions and traction were absolutely perfect.
Race Director
Joined: Mar 2007
Posts: 18,308
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From: Marlton. Increasing performance one speeding ticket at a time! NJ
Not this thread again.......
Wasn't my finest moment.
Same here, and it gets a little iffy.
Wasn't my finest moment.
The internal gearing of the MN6 may make 200mph very difficult. A .74 fifth gear in MN6 compared to a .84 fifth gear in MN12 (C5Z tranny). A 3:73 diff gear may help but I would just enjoy your car and not worry about 200mph. I've been past 180mph before and let off because it feels like the windows are going to get sucked out. The C6 is designed to keep this from happening
Melting Slicks
Joined: Mar 2006
Posts: 3,055
Likes: 0
From: Jax Florida
edit: I see you have 4.10s so you are in C5Z gearing territory. You might not be able to hit 200 because shifting into 6th is a huge disadvantage. BTW, 5300 RPM in 6th will be 200 MPH.
Good luck. Don't die.
Last edited by Ryan L; Dec 24, 2008 at 10:41 AM.
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Safety Car
Joined: Apr 2007
Posts: 3,582
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From: SoCal CA
Since this thread is back from the dead, I'll tell you what the handy-dandy program says it would take for a C5 to go 200 MPH ... based solely on the required RWHP to overcome aerodrag and rolling resistance.
200 MPH possible with 453 RWHP. This equates to approx 532 crank HP.
Qualifier - you would have to re-gear to optimize the use of the RWHP. If you didn't re-gear, it would take much more than 453 RWHP to go 200 MPH. 453 would be the least amount of HP needed if gearing, air conditions and traction were absolutely perfect.
200 MPH possible with 453 RWHP. This equates to approx 532 crank HP.
Qualifier - you would have to re-gear to optimize the use of the RWHP. If you didn't re-gear, it would take much more than 453 RWHP to go 200 MPH. 453 would be the least amount of HP needed if gearing, air conditions and traction were absolutely perfect.
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
200 mph?/ Last time I talked to a guy who wanted to do 200 mph, he chit in his pants when I took him for a ride at 125, then almost puked at 150.
takes more then HP to go that fast. Need a place to do it and know how to stop too.
But what the heck, good luck
Here is a C6Z06 on Daytona doing 176 or so.
http://vimeo.com/2527482
takes more then HP to go that fast. Need a place to do it and know how to stop too.
But what the heck, good luck
Here is a C6Z06 on Daytona doing 176 or so.
http://vimeo.com/2527482
Last edited by AU N EGL; Dec 24, 2008 at 02:01 PM.
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
No, it's not based on any specific gearing. It's a force calculation of RWHP vs (aerodrag + rolling resistance) to determine how much RWHP is required to achieve a specific speed. The gearing would have to be matched to the power curve of the engine in order to use all available RWHP to achieve the max top speed available. The overall gearing combo of tranny, rear end and tire size would have to be matched-up to make the engine put out max HP at or very close to where the car would limit out due to aerodrag + rolling resistance.
Edit -- see posts # 153 and 154 below for more info.
Edit -- see posts # 153 and 154 below for more info.
Last edited by ZeeOSix; Dec 24, 2008 at 04:47 PM.
Thread Starter
Le Mans Master
Joined: Nov 2005
Posts: 5,451
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From: East Peoria Illinois
You should be there... stock 3.42s right? All you need to do is to be able to rev it to 6600 RPM in 5th.
edit: I see you have 4.10s so you are in C5Z gearing territory. You might not be able to hit 200 because shifting into 6th is a huge disadvantage. BTW, 5300 RPM in 6th will be 200 MPH.
Good luck. Don't die.
edit: I see you have 4.10s so you are in C5Z gearing territory. You might not be able to hit 200 because shifting into 6th is a huge disadvantage. BTW, 5300 RPM in 6th will be 200 MPH.
Good luck. Don't die.
I'll try not to die
hows your car doing?
Le Mans Master
Joined: Dec 2005
Posts: 8,475
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From: Port Arthur, Texas 77642
Merry Christmas
Le Mans Master
Joined: Mar 2002
Posts: 5,955
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From: PNW
For a top speed run, the differential should be changed to allow max HP usage from 5th gear.
A 3.42 rear end used in the spreadsheet gives ~205 in 5th gear at 6700 RPM. That's not a bad combo.
A Z06 tranny is actually setup worse for top end in 5th gear, as it's ratio is 0.84, and with a 3.42 rear end will only go ~173 MPH at 6500 RPM. In contrast, the 0.74 5th gear ratio gives ~199 MPH at 6500 RPM.
Last edited by ZeeOSix; Dec 24, 2008 at 04:47 PM.
Burning Brakes
Joined: May 2006
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From: Houston TEXAS
Le Mans Master
Joined: Dec 2005
Posts: 8,475
Likes: 332
From: Port Arthur, Texas 77642
Good info. It can be seen that 4.10s are too low for a top speed run as it will only hit 165~170 at redline, and 6th gear is still useless due to the huge ratio gap between 5th and 6th.
For a top speed run, the differential should be changed to allow max HP usage from 5th gear.
A 3.42 rear end used in the spreadsheet gives ~205 in 5th gear at 6700 RPM. That's not a bad combo.
A Z06 tranny is actually setup worse for top end in 5th gear, as it's ratio is 0.84, and with a 3.42 rear end will only go ~173 MPH at 6500 RPM. In contrast, the 0.74 5th gear ratio gives ~199 MPH at 6500 RPM.
For a top speed run, the differential should be changed to allow max HP usage from 5th gear.
A 3.42 rear end used in the spreadsheet gives ~205 in 5th gear at 6700 RPM. That's not a bad combo.
A Z06 tranny is actually setup worse for top end in 5th gear, as it's ratio is 0.84, and with a 3.42 rear end will only go ~173 MPH at 6500 RPM. In contrast, the 0.74 5th gear ratio gives ~199 MPH at 6500 RPM.
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
More good info. Looks like with a Z06 MN12 tranny, a differential ratio around 2.97 would make the best use of 5th gear for a 200 MPH top end run. Again, 6th gear is useless no matter what diff ratio is used.
Last edited by ZeeOSix; Dec 24, 2008 at 05:35 PM.
Le Mans Master
Joined: Dec 2005
Posts: 8,475
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From: Port Arthur, Texas 77642
Pro
Joined: Jun 2007
Posts: 525
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From: Sometimes Miami Sometimes Orlando Florida
Something else to consider: A tranny cooler. I don't how fast the auto-box will heat up under that load.
Last edited by PaintballaXX; Dec 24, 2008 at 11:37 PM.
Melting Slicks
Joined: Mar 2006
Posts: 3,055
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From: Jax Florida
I haven't modded much of anything since the summer cam swap... I've just been swapping out worn out odds and ends (seat bottom leather and foam, broken drivers mirror glass, etc.) Nothing really exciting, heh. Your car looks like it's been coming together well.
