1 lb of boost enters the throttle body at what speed (mph)?
04-14-2010, 11:11 PM
#1
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1 lb of boost enters the throttle body at what speed (mph)?
Does anyone know if there is a calculation or conversion factor to determine the speed (mph) of a pound of boost?
04-15-2010, 07:58 AM
#2
boost = pressure (and can also be described in terms of efficiency of the setup) and has nothing to do with velocity of the air. CFM rating is more related; I have "heard" that 1000cfm is about 150-175 mph but this is going to depend largely on the diamater of pipes, number of bends, etc.
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04-15-2010, 08:47 AM
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boost = pressure (and can also be described in terms of efficiency of the setup) and has nothing to do with velocity of the air. CFM rating is more related; I have "heard" that 1000cfm is about 150-175 mph but this is going to depend largely on the diamater of pipes, number of bends, etc.
Source: I'm an Engineer
Source: I'm an Engineer
04-15-2010, 09:14 AM
#4
Melting Slicks
I was gonna guess at 180mph but, if it has nothing to do with velocity my azz is wrong anyways.
Tell you what...throw on a VARARAM on a C5 and go do 180mph(or less) and log data on the map....see what happens.
Tell you what...throw on a VARARAM on a C5 and go do 180mph(or less) and log data on the map....see what happens.
04-15-2010, 09:26 AM
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04-15-2010, 04:34 PM
#7
Drifting
with a maggie 0 mph = 12# (wheels spinning)
well on second thought this is not correct because the TB on a maggie never see any boost, the blower is after the tb
you may be looking for boost at rpm and all systems will be diffrent
pd's make lots of boost at lower rpm
centris make it higher
and turbos are all over the page
the design can have a huge impact also.
well on second thought this is not correct because the TB on a maggie never see any boost, the blower is after the tb
you may be looking for boost at rpm and all systems will be diffrent
pd's make lots of boost at lower rpm
centris make it higher
and turbos are all over the page
the design can have a huge impact also.
04-16-2010, 01:43 PM
#8
Racer
Since boost is a measure of pressure, you won't be able to make any sort of correlation to velocity. You can have air that's under pressure that isn't moving whatsoever (think an air tank). As you suspected, you're attempting to compare apples to oranges.
If you wanted to calculate the velocity of the air in the intake track you would need to know the CFM's divided by the diameter of the tubing. For a given CFM the air's velocity will increase in a smaller tube and decrease in a larger tube.
If you want a real-world measure of the airspeed in your intatke track, get one of those little hand-held wind-velocity things:
http://www.kestrelmeters.com/Kestrel...Wind-Meter.pro
and attach it in the tubing somehow. LOL!!
If you wanted to calculate the velocity of the air in the intake track you would need to know the CFM's divided by the diameter of the tubing. For a given CFM the air's velocity will increase in a smaller tube and decrease in a larger tube.
If you want a real-world measure of the airspeed in your intatke track, get one of those little hand-held wind-velocity things:
http://www.kestrelmeters.com/Kestrel...Wind-Meter.pro
and attach it in the tubing somehow. LOL!!
