More than you ever wanted to know about ram air, etc:
04-24-2004, 03:47 PM
#1
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More than you ever wanted to know about ram air, etc:
<center><img src="http://www.vararam.com/images/tech/hbettes_email01.jpg"></center><p>
<ul><li><a href="http://www.vararam.com/reality_of_ram_air01.html">Ram air in a road car</a></li></ul>
<ul><li><a href="http://www.vararam.com/reality_of_ram_air01.html">Ram air in a road car</a></li></ul>
04-24-2004, 03:53 PM
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"In general you never want to use a cone type of filter in a ram air system"-- TTDA "ramifications"?
Aerodynamics leading to the filter are very important here, in general you never want to use a cone type of filter in a ram air system (the air must turn into the filter then return back to the intake, this is because of the cotton construction it will simply not flow air at angles). This is why race cars, where possible, use a panel or flat filter. This gives a direct shot with minimal losses to changes in direction, something that air does not like to do. IF a cone must be used a competition foam filter is recommended (you will not find these at the local speed shop but from specialty manufacturers only) as foam can flow air in all directions. Round is good if sealed in a round air box. Example: a carbureted car.
04-24-2004, 04:08 PM
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I know...
You should see the rest of it.. I'm on my second pass through... some interesting info... especially since it seems that the NACA duct is the only way to go...
04-24-2004, 04:17 PM
#5
TTDA is not a ram air system.....
It was not designed to be one. It may develop a little positive pressure if installed with the feeds, but it's primary purpose is cool, fresh, unheated air.....>
Read your article...That's where the power gains are.
<img src="http://images2.fotki.com/v10/photos/7/7305/137712/postheat-vi.jpg">
Read your article...That's where the power gains are.
<img src="http://images2.fotki.com/v10/photos/7/7305/137712/postheat-vi.jpg">
04-24-2004, 04:18 PM
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So shooting
for positive pressure (net of the turbo of course) couldn't be done with a TTDA "style" piece?
And what about the thing with the cone filter?
I'd think that all it would call for is a proper naca duct for the left hand (former IC vent) say... then block off the right one.
And what about the thing with the cone filter?
I'd think that all it would call for is a proper naca duct for the left hand (former IC vent) say... then block off the right one.
04-24-2004, 04:24 PM
#7
It's a packaging issue as well...>>
I don't think any significant gains can be had by modifying the hose fed system. The path to the box is too circuitous...If you put a NACA duct on the hood and fed a sealed airbox you may have something.
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04-24-2004, 04:33 PM
#10
Yeah - I'm working my way through the rest of the links now...
Any feed we've got is so circuitious I doubt there's much of value to be derived from a step-down strategy. Probably better removing other restrictions like the MAF screens first. It has made me a curious about the design rationale of the stock box though, and trying some modifications to it's design.