Top speed
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Melting Slicks
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From: Sevierville Tn
Melting Slicks
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Doubt it. The C7 Z06 and does 200. The C8 Stingray will suffer from the same problem the C7 GS & Stingray do. When you're up at those speeds, the air is very thick and heavy.The naturally aspirated engines run out of the juice needed to propel the car through the heavy air at those high speeds.
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From: Springfield MO
Doubt it. The C7 Z06 and does 200. The C8 Stingray will suffer from the same problem the C7 GS & Stingray do. When you're up at those speeds, the air is very thick and heavy.The naturally aspirated engines run out of the juice needed to propel the car through the heavy air at those high speeds.
Kindly explain why my C6 Z06 with 505 naturally aspirated horsepower will do 198 MPH and the C6 ZR1 with 638 forced induction horsepower only hits 205 MPH.
Melting Slicks
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Team Owner
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From: Springfield MO
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Melting Slicks
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Doubt it. The C7 Z06 and does 200. The C8 Stingray will suffer from the same problem the C7 GS & Stingray do. When you're up at those speeds, the air is very thick and heavy.The naturally aspirated engines run out of the juice needed to propel the car through the heavy air at those high speeds.
Team Owner
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St. Jude Donor '13
Doubt it. The C7 Z06 and does 200. The C8 Stingray will suffer from the same problem the C7 GS & Stingray do. When you're up at those speeds, the air is very thick and heavy.The naturally aspirated engines run out of the juice needed to propel the car through the heavy air at those high speeds.
But aerodynamic drag is not linear, so going twice as fast requires a lot more than twice as much power.
Melting Slicks
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From: Minnesota
http://www.wallaceracing.com/Calcula...or%20Speed.php
Ignoring gearing, if we use a Cd of 0.325 (previously reported for the test mules so let's bump that up to 0.35), a weight of 3750 with driver, a frontal area of 23 ft^3, it's certainly possible that they could achieve close to 200 mph. They need 400 HP to hit 190 MPH with these parameters and 465 PH to hit 200 MPH. HP is at the wheels. I think 195 is doable but it will probably not hit 200. Lots of uncertain variables like how efficient the DCT is and what is the final Cd and frontal area. I think we can be most confident in the weight. I may be overestimating weight by 50 lbs but we are in the ballpark.
Inputting numbers more reflective of the C6 Z06 - Cd 0.34, Frontal Area 22.3, Weight 3450, 198-199 MPH falls right in line with that that car was dynoing (on realistic dynos) which was around 440 RWHP.
Ignoring gearing, if we use a Cd of 0.325 (previously reported for the test mules so let's bump that up to 0.35), a weight of 3750 with driver, a frontal area of 23 ft^3, it's certainly possible that they could achieve close to 200 mph. They need 400 HP to hit 190 MPH with these parameters and 465 PH to hit 200 MPH. HP is at the wheels. I think 195 is doable but it will probably not hit 200. Lots of uncertain variables like how efficient the DCT is and what is the final Cd and frontal area. I think we can be most confident in the weight. I may be overestimating weight by 50 lbs but we are in the ballpark.
Inputting numbers more reflective of the C6 Z06 - Cd 0.34, Frontal Area 22.3, Weight 3450, 198-199 MPH falls right in line with that that car was dynoing (on realistic dynos) which was around 440 RWHP.
Thread Starter
Melting Slicks
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From: Sevierville Tn
Thats whats stupid about this place.
You guys sit around ready to jump anyone
No need to reply back
Melting Slicks
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The factors affecting the calculation of drag include air density, surface area, coefficient of drag, and half the velocity squared. The C8 is a little wider? So that is going to increase drag in direct proportion to the increase in area. I don't think we know what the coefficient of drag is yet, so that's an unknown for the time being. I think it'll be pretty close to the current C7. I would say it should be close to the C7 in top speed.
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2020 C8 of the Year Finalist - Unmodified
Melting Slicks
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Le Mans Master
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From: Austin Texas
That and top speed is limited by cube-root( power ).
Last edited by MitchAlsup; Aug 2, 2019 at 04:59 PM.
Instructor
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From: Camas, WA
http://www.wallaceracing.com/Calcula...or%20Speed.php
Ignoring gearing, if we use a Cd of 0.325 (previously reported for the test mules so let's bump that up to 0.35), a weight of 3750 with driver, a frontal area of 23 ft^3, it's certainly possible that they could achieve close to 200 mph. They need 400 HP to hit 190 MPH with these parameters and 465 PH to hit 200 MPH. HP is at the wheels. I think 195 is doable but it will probably not hit 200. Lots of uncertain variables like how efficient the DCT is and what is the final Cd and frontal area. I think we can be most confident in the weight. I may be overestimating weight by 50 lbs but we are in the ballpark.
Inputting numbers more reflective of the C6 Z06 - Cd 0.34, Frontal Area 22.3, Weight 3450, 198-199 MPH falls right in line with that that car was dynoing (on realistic dynos) which was around 440 RWHP.
Ignoring gearing, if we use a Cd of 0.325 (previously reported for the test mules so let's bump that up to 0.35), a weight of 3750 with driver, a frontal area of 23 ft^3, it's certainly possible that they could achieve close to 200 mph. They need 400 HP to hit 190 MPH with these parameters and 465 PH to hit 200 MPH. HP is at the wheels. I think 195 is doable but it will probably not hit 200. Lots of uncertain variables like how efficient the DCT is and what is the final Cd and frontal area. I think we can be most confident in the weight. I may be overestimating weight by 50 lbs but we are in the ballpark.
Inputting numbers more reflective of the C6 Z06 - Cd 0.34, Frontal Area 22.3, Weight 3450, 198-199 MPH falls right in line with that that car was dynoing (on realistic dynos) which was around 440 RWHP.
Last edited by Rufus Macblorf; Aug 2, 2019 at 05:12 PM.
