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Forum namePerformance/Engine
Topic subjectRE: homemade NOS/cryo-like boost using compressed air
Topic URLhttp://forums.2gnt.com/dcboard.php?az=show_topic&forum=5&topic_id=51783&mesg_id=51923
51923, RE: homemade NOS/cryo-like boost using compressed air
Posted by a_miller_76, Dec-31-69 06:00 PM
Uhm.....first of all you get BOOST from a turbo because it is a closed system. If you try to raise the system pressure it's just gonna equalize and blow back out of your intake unless you close the system off.


Secondly, you ever used one of those shop blower attachments on an air compressor? Sure, they put out some good psi, but that's in a hose with an interior diameter of 1/4". You're talking about an intake that has 8 times that diameter (Our throttle body is is 2 inches)

The surface area of a circle is what, 3.14 X R2 (that's supposed to be squared)

So your surface area on that air compressor hose is .049 square inches (Radius=.125" if the hose has a .25 interior diameter). But on your intake it's 3.14 (since the radius is 1). Now if you divide the two 3.14/.049=64.08.....so you are going to have to produce 64 times the pressure to maintain a similar pressure from the hose to the intake.

Or a better way of looking at it is your intake will see 1/64th of the pressure of that hose. So if your hose has a 10psi constant pressure then your intake is going to see 0.15625psi.



Do you really want to go through all that trouble for 0.15625 worth of "boost" which will probably just equalize the system anyhow?



And the guy who sprayed it into his intake. Uhm....your fuel air is calculated by your computer through the throttle position sensor, map sensor, and o2 sensor. If your car wasn't getting any throttle of course it will bog :) Besides, compressed air is basically CO2....guys, fire extenguishers are made out of CO2 :thumbsup
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