Ram Air, functional, or just a cai?
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Ram Air, functional, or just a cai?
I got in a big discussion on this on another forum. Some guy with a vette wrote a long article about how ram air couldn't help an automobile, based on the fact that ram jets wont function under mach .5 on fighter jets. 
Anyone that has done a ram air mod on their car, do you think it helped? Could you see a difference in highway speed acceleration? Just want to see what the general consesus is.
Anyone that has done a ram air mod on their car, do you think it helped? Could you see a difference in highway speed acceleration? Just want to see what the general consesus is.
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Except for the fact that they act as cold air intakes most ram air systems do not do anything at 'normal' speeds.
On some exotics and motorcycles they have been shown to help force air through the induction system at triple digit speeds.
In a way your friend is right to a point since you have to get up to a good fraction of a mach to see noticeable pressure from the ram effect, but 150 mph can make for some noticeable cowl pressure.
On some exotics and motorcycles they have been shown to help force air through the induction system at triple digit speeds.
In a way your friend is right to a point since you have to get up to a good fraction of a mach to see noticeable pressure from the ram effect, but 150 mph can make for some noticeable cowl pressure.
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ram air absoultly helps. if for no other reason it pulls cold air from outside of the engine bay instead of hot air from inside the engine bay. cold air has a higher concentration of oxygen in it and that makes HP.
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Originally posted by Vito_Corleone I'm a ricer.
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Some guy hooked a vacum gauge up to his intake, and measured a lower vacuum,,,(closer to atmosphere) with the mouth of the intake pointing into oncomming wind at 70mph.
Wouldnt the reduction of vacuu indicate a denser air charge?
Wouldnt the reduction of vacuu indicate a denser air charge?
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BS, at 70 the ram effect could not even be noticed on a normal vacuume gauge.
It would take 220 mph winds to create a pressure of 1 PSI and the pressure rises exponentially with the velocity (v^2). That means that at 1/3 of that speed there would be only 1/9 the pressure, so the real efect at 70 would at best be a tenth of a PSI. That kind of pressure difference is unnoticeable on any vacuume gauge.
It would take 220 mph winds to create a pressure of 1 PSI and the pressure rises exponentially with the velocity (v^2). That means that at 1/3 of that speed there would be only 1/9 the pressure, so the real efect at 70 would at best be a tenth of a PSI. That kind of pressure difference is unnoticeable on any vacuume gauge.
