1/4 mile calculations
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Joined: Apr 2007
Posts: 619
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Joined: Apr 2007
Posts: 619
from what i've seen (i keep tack of rwhp dyno numbers and such in a database) most manual transmission cars lose between 11-13% while most MODERN autos lose 13-15%. Older OD auto's are usually 16-18% and the large oldschool 3spd autos are in the 19-22% range.
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Joined: Dec 2000
Posts: 279
From: Minneapolis
I've been to a couple around here but usually cars are .5 to .7 slower than their normal ETs from not being able to hook.
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Joined: Apr 2007
Posts: 619
ya i know. but those are the only nights (days) when they don't do ANY sort of inspection on the cars for NHRA safety equiptment.
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Joined: Jun 2000
Posts: 3,463
From: SoCal
Your car violates the 13.49 roll bar rule in stock trim as many newer converts do these days. But many tracks I've been to allow the convert drivers to have some fun during T&T as long as they don't do anything to make the track mangers think they are in over their heads and heading for danger.
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Joined: Apr 2007
Posts: 619
Thought you said you were kicked off the track. Did you get squirly on launch and draw attention to yourself?
Your car violates the 13.49 roll bar rule in stock trim as many newer converts do these days. But many tracks I've been to allow the convert drivers to have some fun during T&T as long as they don't do anything to make the track mangers think they are in over their heads and heading for danger.
Your car violates the 13.49 roll bar rule in stock trim as many newer converts do these days. But many tracks I've been to allow the convert drivers to have some fun during T&T as long as they don't do anything to make the track mangers think they are in over their heads and heading for danger.
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Joined: Mar 2006
Posts: 149
I did a little speculative bench racing based on some real world info that I had verified with my own eyes and came up with this.
For reference I used this google gem to get started.
http://www.race-cars.net/calculators/et_calculator.html
Assuming a 3860 Curb weight of an SS with the T6060 Rated at 422hp and then a very uncharacteristic 15% drive loss I come up with 359whp
Stock 359whp:
12.64 @ 107mph
Lightly modded(BPU) 392whp:
12.28@110.92mph
Full BPU with Cam and Tune 451whp:
11.72@116.23mph
In my opinion for a Camaro to be running mid 11's with mods that almost every single one of us will do just for the sound alone is not bad. I for one am impressed. You also have to realize that I was being conservative with the numbers figuring a 15% drive line loss. If I used the numbers straight from my friends Vette it works out like this.
Stock 385whp:
12.36@110.26mph
Lightly modded(BPU) 418whp:
12.02@113.32mph
Full BPU with Cam and Tune 477whp:
11.52@118.23mph
Worry all you want about how it is certified, but you can color me impressed when all I have spend is about 2 grand in mods and some wrench time to be running in the 11's on street tires.
http://www.race-cars.net/calculators/et_calculator.html
Assuming a 3860 Curb weight of an SS with the T6060 Rated at 422hp and then a very uncharacteristic 15% drive loss I come up with 359whp
Stock 359whp:
12.64 @ 107mph
Lightly modded(BPU) 392whp:
12.28@110.92mph
Full BPU with Cam and Tune 451whp:
11.72@116.23mph
In my opinion for a Camaro to be running mid 11's with mods that almost every single one of us will do just for the sound alone is not bad. I for one am impressed. You also have to realize that I was being conservative with the numbers figuring a 15% drive line loss. If I used the numbers straight from my friends Vette it works out like this.
Stock 385whp:
12.36@110.26mph
Lightly modded(BPU) 418whp:
12.02@113.32mph
Full BPU with Cam and Tune 477whp:
11.52@118.23mph
Worry all you want about how it is certified, but you can color me impressed when all I have spend is about 2 grand in mods and some wrench time to be running in the 11's on street tires.
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Joined: Apr 2007
Posts: 619
385 rwhp is a little high. That's about average for the 430 hp vette, while the 436 vette's are usually 390 rwhp. the camaro will probably make ~370-375rwhp.
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Joined: May 2004
Posts: 230
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because the LS3 in the Camaro will have 422 hp versus 430-436 for the Corvette. The Camaro will be SAE certified (as is the corvette) meaning what it's rated at is what it will make, within 1%. The differences will probably be very minor, such as exhaust and intake tracking, but the power difference will be there.
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Joined: May 2004
Posts: 230
because the LS3 in the Camaro will have 422 hp versus 430-436 for the Corvette. The Camaro will be SAE certified (as is the corvette) meaning what it's rated at is what it will make, within 1%. The differences will probably be very minor, such as exhaust and intake tracking, but the power difference will be there.
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Joined: Jul 2001
Posts: 574
From: Richmond, TX
they dont SAE certify all the motors (just a couple for testing), thats why vettes put down 380-390rwhp in M6 trim and is rated at 43Xhp which doesn't equate if you do the math. which brings me to whole point in this discussion with you, why would the camaro be 370-375? Unless they really mess with the tune and the exhaust, it should be on par with the vette.
The vette has a more efficient transaxle. On the order of 10% loss. 395/.9 = 438 almost dead on with the SAE rating.
The Camaro with a conventional transmission axle will have losses on the order of 12%.
422(.88) = 371rwhp
The Camaro SS will dyno about 20-25 less rwhp than a vette. Bet on it.
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Joined: Feb 2000
Posts: 2,026
From: Japan
Where are you getting your data from with regards to efficiency losses?
The vette has a more efficient transaxle. On the order of 10% loss. 395/.9 = 438 almost dead on with the SAE rating.
The Camaro with a conventional transmission axle will have losses on the order of 12%.
422(.88) = 371rwhp
The Camaro SS will dyno about 20-25 less rwhp than a vette. Bet on it.
The Camaro with a conventional transmission axle will have losses on the order of 12%.
422(.88) = 371rwhp
The Camaro SS will dyno about 20-25 less rwhp than a vette. Bet on it.
Registered User
Joined: May 2004
Posts: 230
The vette has a more efficient transaxle. On the order of 10% loss. 395/.9 = 438 almost dead on with the SAE rating.
The Camaro with a conventional transmission axle will have losses on the order of 12%.
422(.88) = 371rwhp
The Camaro SS will dyno about 20-25 less rwhp than a vette. Bet on it.
The Camaro with a conventional transmission axle will have losses on the order of 12%.
422(.88) = 371rwhp
The Camaro SS will dyno about 20-25 less rwhp than a vette. Bet on it.
14-16% for the manual, 18-20% for the auto.
