3 eyed e30s

[asubimmer]

Korea619, details of the stack you've used there?

I have some of the same ones, just go to autozone iirc.

[nando]

If you were to do a Hose Directly to the headlight (bracket) from the airbox
I'm pretty sure it would do something. I wonder if you could do a straight shot, or turn the airbox on it's side so the air goes through large hose directly through the filter into the afm, almost like the air is hitting a wall (filter), instead of going to the bottom of the airbox, up through the filter, and then up again into the Afm. I hope i'm making sense, but I seems like it would work to create a minimum amount of pressure.

I don't think it would.

IATs actually climb at high speeds (80-100mph+) so the amount of air flow into the headlight actually drops. That probably means that the pressure goes down as speed goes up.

the stock airbox was a pretty big restriction for me in any case so that would be pretty pointless. :p

[lifeiskaos]

nando, mind posting a pic of your intake? i'm curious how it is setup that showed improvements with the lack of a headlight

[nando]

it's a standard K&N cone filter, 3" intake tube. The filter is the biggest one I could fit (more surface area = more flow), I think 9" long and 6" diameter. the duct from the headlight blows directly on the filter. It made an extra 10whp which isn't bad for the $40 it cost me. :p

[newman]

I have seen too many POS VWs w/ a velocity stack sticking out of the grill for me to think this is cool anymore.

There is so much through-put of air through the engine bay at speed, that I suspect you're probably not going to see an appreciable difference in IATs

[nando]

I have seen too many POS VWs w/ a velocity stack sticking out of the grill for me to think this is cool anymore.

There is so much through-put of air through the engine bay at speed, that I suspect you're probably not going to see an appreciable difference in IATs

I didn't think so either but my measurements proved otherwise

25mph before:


25mph after:


70mph before:


70mph after:


high speed before (I think this was 90mph):


high speed after:


on the track temps started to climb above 100mph which leads me to believe that pressure drops as speed increases, so the intake sucks in more engine bay air and less from the high beam port.

[kamotors]

ducting is the most important part for a cold air intake.I just duct mine from inbetween the headlights so it doesn't look goofy.

[nando]

yeah I only use the high beam delete on the track. I really don't care about a 5hp loss when I'm on my way to work. :p

plus I'll run the stock intake during the winter anyway

[xwill112x]

Van Westervelt, your car looks tits.

/thread.

[fiftytakedowns]

Wow, Impressive, I will shut up now.

Thanks for your data.

[fiftytakedowns]

went to autozone to try and find one, I couldn't find them anywhere in the store, where else should I look?

[nando]

ebay, I think I got two for about $12.

[fiftytakedowns]

ebay, I think I got two for about $12.

Which size did you get, Any specific brand do you remember?

Thanks, I hate ordering the wrong stuff.

[thedeal]

That probably means that the pressure goes down as speed goes up.

Daniel Bernoulli was a smart guy. His principle states pretty much anything you need to know here. The basis is: As velocity increases, pressure decreases. This explains how the airfoil on the wing of an airplane provides lift, and how the venturi of a carburetor provides negative pressure (compared to ambient) in order to withdraw fuel from the float tank. Also how the compressor wheel in a turbo increases air pressure. Same thing here. Basically you would want a divergent duct after your air filter to convert higher velocity to higher pressure.

Check it out: http://en.wikipedia.org/wiki/Bernoulli%27s_principle

Garrett

[fiftytakedowns]

wat