Ran my bro's modded 450rwhp 03 cobra [vid]
04-20-2005, 02:58 PM
#22
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Originally Posted by GodSpeedGTA
rrrrriiiiiiiiiiiiiiiiiiiiiiiiiiiiiiigggghhht i think most would agree that if you took a stock cobra and a stock ls1 *supercharged* and ran them at the same boost with good drivers there isnt a doubt who would win but whatever that never makes the mustang fellas happy
no matter im not gonna sit and flame war about it its not worth the time to be retarded and argue pointlessly online
no matter im not gonna sit and flame war about it its not worth the time to be retarded and argue pointlessly online
No big deal.
04-20-2005, 05:15 PM
#25
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Originally Posted by Camaro ChriSS
I think unit is merely implying that the "shoulda, woulda, coulda.." argument is generally weak. GM didn't make a LS1 with a blower, so its a moot point arguing that it would have been better. That's just bench racing talk.
No big deal.
No big deal.
You're talking about a real blower vs. a stock Eaton which is a POS. How about a "real" blower such as a KB on a stock cobra?
Either conversation is pointless.
I couldn't see the vid for some reason so I'll just say congrats on the nice kill.
04-20-2005, 07:00 PM
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I think you should run what you brung and hope you brought enough. But just to compare, I think this would be fun. I had posted this on the SVT forum. Not to many people have talked to me since.
"I get tired of people equating a smaller engine with boost and making more power is somehow greater than a larger engine making power. They are comparable in this way. Something for you to ponder:
Any engine with boost automatically increases it's displacement. Take the ideal gas equation P1*V1=P2*V2.
P1=14.7 PSI (Atmospheric pressure)
V1= X (What we are solving for)
P2=22.7 PSI (Atmospheric pressure + 8 PSI of Boost)
V2=281 Cubic inches (engine displacement)
Solving the equation for V1,
V1=(P2*V2)/P1
V1=434 Cubic Inches
I did not include Temperature as part of the equation since I do not know the intake temps of a NA vs. Supercharged engines, but this gives us a good idea that you need a 434 Cubic Inch engine (NA) to move as much air as a 281 Cubic Inch Engine with 8 PSI of boost. Edit: Temp affect would be small.
Who all's pissed off now?"
By the way 15 psi equates to 568 cubic inches.
"I get tired of people equating a smaller engine with boost and making more power is somehow greater than a larger engine making power. They are comparable in this way. Something for you to ponder:
Any engine with boost automatically increases it's displacement. Take the ideal gas equation P1*V1=P2*V2.
P1=14.7 PSI (Atmospheric pressure)
V1= X (What we are solving for)
P2=22.7 PSI (Atmospheric pressure + 8 PSI of Boost)
V2=281 Cubic inches (engine displacement)
Solving the equation for V1,
V1=(P2*V2)/P1
V1=434 Cubic Inches
I did not include Temperature as part of the equation since I do not know the intake temps of a NA vs. Supercharged engines, but this gives us a good idea that you need a 434 Cubic Inch engine (NA) to move as much air as a 281 Cubic Inch Engine with 8 PSI of boost. Edit: Temp affect would be small.
Who all's pissed off now?"
By the way 15 psi equates to 568 cubic inches.
04-20-2005, 07:10 PM
#27
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sounds like it would be something to see
i agree that the argument is played out and thats exactly why i let it drop the point probably didnt need to be made its just what came to my head after watching the vid
nice vid both cars are way faster than mine....for now
i agree that the argument is played out and thats exactly why i let it drop the point probably didnt need to be made its just what came to my head after watching the vid
nice vid both cars are way faster than mine....for now
04-21-2005, 11:49 PM
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Originally Posted by BBQLS1
I think you should run what you brung and hope you brought enough. But just to compare, I think this would be fun. I had posted this on the SVT forum. Not to many people have talked to me since.
"I get tired of people equating a smaller engine with boost and making more power is somehow greater than a larger engine making power. They are comparable in this way. Something for you to ponder:
Any engine with boost automatically increases it's displacement. Take the ideal gas equation P1*V1=P2*V2.
P1=14.7 PSI (Atmospheric pressure)
V1= X (What we are solving for)
P2=22.7 PSI (Atmospheric pressure + 8 PSI of Boost)
V2=281 Cubic inches (engine displacement)
Solving the equation for V1,
V1=(P2*V2)/P1
V1=434 Cubic Inches
I did not include Temperature as part of the equation since I do not know the intake temps of a NA vs. Supercharged engines, but this gives us a good idea that you need a 434 Cubic Inch engine (NA) to move as much air as a 281 Cubic Inch Engine with 8 PSI of boost. Edit: Temp affect would be small.
Who all's pissed off now?"
By the way 15 psi equates to 568 cubic inches.
"I get tired of people equating a smaller engine with boost and making more power is somehow greater than a larger engine making power. They are comparable in this way. Something for you to ponder:
Any engine with boost automatically increases it's displacement. Take the ideal gas equation P1*V1=P2*V2.
P1=14.7 PSI (Atmospheric pressure)
V1= X (What we are solving for)
P2=22.7 PSI (Atmospheric pressure + 8 PSI of Boost)
V2=281 Cubic inches (engine displacement)
Solving the equation for V1,
V1=(P2*V2)/P1
V1=434 Cubic Inches
I did not include Temperature as part of the equation since I do not know the intake temps of a NA vs. Supercharged engines, but this gives us a good idea that you need a 434 Cubic Inch engine (NA) to move as much air as a 281 Cubic Inch Engine with 8 PSI of boost. Edit: Temp affect would be small.
Who all's pissed off now?"
By the way 15 psi equates to 568 cubic inches.
This allows a NA 346 to move more air, make 500 rwhp and motor right past your theoretical 281....
04-22-2005, 08:43 AM
#32
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Originally Posted by cantdrv65
Fine equation but you forgot RPM brotha! This allows a NA 346 to move more air, make 500 rwhp and motor right past your theoretical 281....
This allows a NA 346 to move more air, make 500 rwhp and motor right past your theoretical 281....
04-22-2005, 10:33 AM
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and considering a well tune 4.6 DOHC Cobra motor will support (not recommended daily) 7500 RPM, what was that argument now? Have I been that high with my motor? Once, no issues but scary sounding for sure. I forgot the tune I got turned off the limiter and just was flat slow shifting. It's freaking amazing how quick these things get R's.
04-25-2005, 08:09 AM
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Originally Posted by BBQLS1
I did not include Temperature as part of the equation since I do not know the intake temps of a NA vs. Supercharged engines, but this gives us a good idea that you need a 434 Cubic Inch engine (NA) to move as much air as a 281 Cubic Inch Engine with 8 PSI of boost.
04-25-2005, 08:48 AM
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My statement is entirely correct. If you want to add rpm into the equation, fine just multiply my number by how many RPMs you want to turn an engine and you will have how much air is moved per minute.
Here, I'll do it for you.
RPM NA 281 8 PSI 281 346 NA
1000 281000 434000 346000
2000 562000 868000 692000
3000 843000 1302000 1038000
4000 1124000 1736000 1384000
5000 1405000 2170000 1730000
6000 1686000 2604000 2076000
7000 1967000 3038000 2422000
8000 2248000 3472000 2768000
This would assume full cylinder filling.
This really doesn't change anything. It's relative to power made, but doesn't count for i/e effeciency, fuel ratio, power potential for the fuel, temperature. Lots of other variables. I'm not sure what you are trying to show. I'm just showing that a 8PSi 281 would move the air of a NA 434, and would make similar power. I'm not calculating how much power.
Here, I'll do it for you.
RPM NA 281 8 PSI 281 346 NA
1000 281000 434000 346000
2000 562000 868000 692000
3000 843000 1302000 1038000
4000 1124000 1736000 1384000
5000 1405000 2170000 1730000
6000 1686000 2604000 2076000
7000 1967000 3038000 2422000
8000 2248000 3472000 2768000
This would assume full cylinder filling.
This really doesn't change anything. It's relative to power made, but doesn't count for i/e effeciency, fuel ratio, power potential for the fuel, temperature. Lots of other variables. I'm not sure what you are trying to show. I'm just showing that a 8PSi 281 would move the air of a NA 434, and would make similar power. I'm not calculating how much power.
Last edited by BBQLS1; 04-25-2005 at 09:00 AM.
04-25-2005, 10:46 AM
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Like I said not trying to be a dick, just wanted to point out that several other factors affect the volume of air moved...
But yeah the general point you were trying to make is true. Sorry, sometimes Im a little quick to run the mouth.
But yeah the general point you were trying to make is true. Sorry, sometimes Im a little quick to run the mouth. Last edited by cantdrv65; 04-25-2005 at 11:01 AM.
