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Old 03-06-2014, 02:20 AM   #71
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I'm not going to give you the answer. Use Google. Learn something new. I promise it won't hurt and will be very useful.
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Old 03-06-2014, 12:59 PM   #72
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Quote:
Originally Posted by iminhell View Post
You have a circle with a diameter of 3" and one with a diameter of 4".
What is the total air pressure exerted on each?
The total air pressure exerted on a 3" dia. circle and a 4" dia. circle would be the same given they are at the same atmospheric pressure. Where you are asking about air pressure on an area at least. Now, if we are talking about hydrostatic pressures and the increase or drop in pressure between two different diameters of pipe (cylinder), that is a different calculation all together.....
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Old 03-06-2014, 05:22 PM   #73
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I probably worded it wrong. Though I don't believe I did.

Think about air pressure more, you might be onto something ...
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Old 03-06-2014, 05:28 PM   #74
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Quote:
Originally Posted by iminhell View Post
I'm not going to give you the answer. Use Google. Learn something new. I promise it won't hurt and will be very useful.
If you not not going to give help or opinions, why are you even posting?
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Old 03-06-2014, 06:04 PM   #75
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throttle body

Quote:
Originally Posted by Bcardwell101 View Post
my tb will be in a 4:30 today ohio time im going to try to install today and give my thoughts tonight or tomorrow. i dont even know any place i could dyno at in ohio im sure there are some in columbus i could get to but ill try to have all numbers of everything as soon as i can so everyone can see whats going on with my end of things. trying to help as much as i can should have things posted in a week or as fast as i can get a dyno with list of all my mods.
how much was the throttle body and do you have an intake to go with the throttle body?
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Old 03-06-2014, 06:04 PM   #76
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More pressure=less volume, people.

Though my point doesn't change. When the volume the tb is capable of providing already exceeds the amount of air needed you're not going to gain anything.
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Old 03-06-2014, 06:08 PM   #77
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Quote:
Originally Posted by GhostTribute View Post
The total air pressure exerted on a 3" dia. circle and a 4" dia. circle would be the same given they are at the same atmospheric pressure. Where you are asking about air pressure on an area at least. Now, if we are talking about hydrostatic pressures and the increase or drop in pressure between two different diameters of pipe (cylinder), that is a different calculation all together.....
Unfortunately unless you have a baseline at almost identical conditions with the stock TB having your car dyno'd with the new TB will be pointless with respect to gains(or losses for that matter)
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Old 03-06-2014, 06:27 PM   #78
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Quote:
Originally Posted by MakatoMotors View Post
If you not not going to give help or opinions, why are you even posting?
I was trying to teach you something rather than feeding you. I've never found feeding to work well or stick.


Quote:
Originally Posted by goingtoscotland View Post
More pressure=less volume, people.
You're missing variables and therefore incorrect.

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Air Pressure.
We refer to it in terms of Pounds per Square Inch. That is how much force is exerted on a surface. One square inch of surface has ~14.7 Pounds of (downward) force on it.
If you apply that to my question,
a 3" diameter has,
Pi*R^2 area, 3.14*1.5^2 = 7.065 square inches, 7.065*14.7 = 103.8555 pounds of force
a 4" diameter has,
Pi*R^2 area, 3.14*2^2 = 12.56 square inches, 12.56*14.7 = 184.632 pounds of force


Understand how an increase in diameter translates into more flow?
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Old 03-06-2014, 06:53 PM   #79
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And you have a complete misunderstanding of fluid dynamics and how they come into play in a restriction

That's static air pressure(at sea level), and has nothing to do with velocity or volume. Not sure where you're even going with that? If you take a throttle body and reduce the size you will lower pressure IN the restriction, increase velocity in the restriction, and decrease the maximum amount of air that restriction is capable of flowing in whatever measurement you decide to use. Should you increase the size of the restriction you will DECREASE PRESSURE in the restriction AND DECREASE VELOCITY, and INCREASE VOLUME. Smaller opening=higher velocities. Higher velocities=lower volume.

So yes. a larger opening will increase volume, but pressure isn't involved in the way you think it is.

A larger TB on an FI car will net you good gains because it produces WAY more suction than an NA motor.

edit: reworded. Content the same
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Old 03-06-2014, 07:11 PM   #80
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just post dyno numbers and end all of this argueing!!
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