**LMR Standing Mile Camaro Build Begins**
01-27-2011, 09:12 PM
#81
FWIW, here are some interesting wind tunnel measurements:
http://www.fastestlaps.com/forum/vie...8b7f50e039302a
The Z06 CdA @ 0.64, ZR1 CdA @ 0.66. They don't have measurements for the C6 coupe or any model/year camaro, though the C6 has a smaller frontal area and Cd than the Z06 so would probably be close to 0.60.
Note that these numbers compare favorably to the Gallardo, GT, GTR shapes, though they produce some lift at 200km/h as opposed to being neutral or small downforce.
The 997 Turbo has some great numbers, 0.59 CdA and a small amount of lift at the front. I would guess the C6 coupe is similar but with more lift.
I would also guess that the Supra shape is fairly efficient, with its small frontal area. Don't know for sure though... anyone?
EDIT: Found one source that cites 0.62 CdA... though it is based on an estimate of frontal area x Cd of 0.32. http://carspector.com/car/toyota/010706/
http://www.fastestlaps.com/forum/vie...8b7f50e039302a
The Z06 CdA @ 0.64, ZR1 CdA @ 0.66. They don't have measurements for the C6 coupe or any model/year camaro, though the C6 has a smaller frontal area and Cd than the Z06 so would probably be close to 0.60.
Note that these numbers compare favorably to the Gallardo, GT, GTR shapes, though they produce some lift at 200km/h as opposed to being neutral or small downforce.
The 997 Turbo has some great numbers, 0.59 CdA and a small amount of lift at the front. I would guess the C6 coupe is similar but with more lift.
I would also guess that the Supra shape is fairly efficient, with its small frontal area. Don't know for sure though... anyone?
EDIT: Found one source that cites 0.62 CdA... though it is based on an estimate of frontal area x Cd of 0.32. http://carspector.com/car/toyota/010706/
Word on the street is that the RWD car that has gone fastest at the mile (SW's Supra) was only able to use about 1200 rwhp to go 246. I am very interested to see what solutions LMR come up with to put all of that crazy power they are building down.
01-27-2011, 09:33 PM
#82
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[biggest factor and also why the Gallardos are doing so well in this type of event, they hook better. Just ask anyone who has done a roll on with a TTG.
The Gallardos are 4 wheel drive right?
Remo
The Gallardos are 4 wheel drive right?
Remo
01-27-2011, 10:11 PM
#84
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I think SW's supra pushed more than 1200whp, they also most likely ramped in boost by speed.
It is alot of trial and error ramping boost in and if SW stayed in the game with a stronger setup and more gear they could probably push out some higher numbers.
Just a guess though.
It is alot of trial and error ramping boost in and if SW stayed in the game with a stronger setup and more gear they could probably push out some higher numbers.
Just a guess though.
01-27-2011, 10:12 PM
#85
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dont forget about the white third gen firebird from drag week.....didnt it already put down a 240+ run at maxton?
Ill bet it has more left in it too. It ran 7.8's I think at around 180 mph I think at drag week.
Ill bet it has more left in it too. It ran 7.8's I think at around 180 mph I think at drag week.
01-27-2011, 10:43 PM
#86
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The CdA does play a role but a more important aerodynamic role is down force on the rear tires for the RWD cars. Getting these things to hook with tires that are safe to go over 200 mph on them, on an unprepared surface, is the biggest factor and also why the Gallardos are doing so well in this type of event, they hook better. Just ask anyone who has done a roll on with a TTG.
Word on the street is that the RWD car that has gone fastest at the mile (SW's Supra) was only able to use about 1200 rwhp to go 246. I am very interested to see what solutions LMR come up with to put all of that crazy power they are building down.
Word on the street is that the RWD car that has gone fastest at the mile (SW's Supra) was only able to use about 1200 rwhp to go 246. I am very interested to see what solutions LMR come up with to put all of that crazy power they are building down.
[And one might argue all of this is a moot point if the front lifts off the ground...
]All other things being equal, yes weight on rear and/or downforce (lack of lift...) is important. Ground effects and methods to reduce lift w/o introducing much drag will surely be important.
I guess RC's Z06 also has a *lot* of weight in the rear vs stock Z06 also... 2 batteries, 5 gallons of ice+water, two big turbos and associated plumbing... 200 lbs?
01-27-2011, 10:47 PM
#87
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The CdA does play a role but a more important aerodynamic role is down force on the rear tires for the RWD cars. Getting these things to hook with tires that are safe to go over 200 mph on them, on an unprepared surface, is the biggest factor and also why the Gallardos are doing so well in this type of event, they hook better. Just ask anyone who has done a roll on with a TTG.
Word on the street is that the RWD car that has gone fastest at the mile (SW's Supra) was only able to use about 1200 rwhp to go 246. I am very interested to see what solutions LMR come up with to put all of that crazy power they are building down.
Word on the street is that the RWD car that has gone fastest at the mile (SW's Supra) was only able to use about 1200 rwhp to go 246. I am very interested to see what solutions LMR come up with to put all of that crazy power they are building down.
01-27-2011, 11:47 PM
#89
I think SW's supra pushed more than 1200whp, they also most likely ramped in boost by speed.
It is alot of trial and error ramping boost in and if SW stayed in the game with a stronger setup and more gear they could probably push out some higher numbers.
Just a guess though.
It is alot of trial and error ramping boost in and if SW stayed in the game with a stronger setup and more gear they could probably push out some higher numbers.
Just a guess though.
IMO SW and crew made the most concentrated effort of anyone running mile events to date.
Traction is important but first thing's first: Better aero = less power required for a given speed = less traction required to apply that power.
[And one might argue all of this is a moot point if the front lifts off the ground...]
All other things being equal, yes weight on rear and/or downforce (lack of lift...) is important. Ground effects and methods to reduce lift w/o introducing much drag will surely be important.
I guess RC's Z06 also has a *lot* of weight in the rear vs stock Z06 also... 2 batteries, 5 gallons of ice+water, two big turbos and associated plumbing... 200 lbs?
[And one might argue all of this is a moot point if the front lifts off the ground...
]All other things being equal, yes weight on rear and/or downforce (lack of lift...) is important. Ground effects and methods to reduce lift w/o introducing much drag will surely be important.
I guess RC's Z06 also has a *lot* of weight in the rear vs stock Z06 also... 2 batteries, 5 gallons of ice+water, two big turbos and associated plumbing... 200 lbs?
Also, anyone who has ever watched a NASCAR race can keep the car from flying away in a standing mile, just don't let air get under the front.
Last edited by 05HD; 01-27-2011 at 11:59 PM.
01-30-2011, 12:42 AM
#94
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and if you guys are wondering about RC's vette, Steven posted a vid of it not long ago going (I think, if i remember right) 60 to 160 in less than 7 seconds with zero wheel spin on a certain road that is not for racing. So is traction an issue? it was, but not anymore
01-30-2011, 10:06 AM
#95
You're absolutely right. The TX Mile mandates the use of ZR rated rubber if attempting over 190mph. If you run anything else and go for 190+ anyway they fine then ban you. Only option as far as race rubber is to go with hoosier road race slicks; ZR rated. Surprisingly, most guys are running std street rubber or nitto 555s.
After trying multiple tires on a big nitrous C5 Z06 on the street.... we ended up with TOYO RA1's......which handled 800+ftlbs of a nitrous hit. Also ran the tire on my car......awesome tires. They handle super high speed lane changes and hook up awesome. Gonna run them on my car for mile events and street use.
04-13-2011, 09:40 AM
#98
here you go check this out it has the story... https://ls1tech.com/forums/texas-mem...39mph-vid.html
