Air Filter Mounted In Direct Air Flow On Front Bar

[GeeTR]

so if I'm reading correctly too much air ramed in is not doing you any good.

I setup a box over the pod and AFM and took away the stock intake. I used a 3" pipe from the grill which comes in under the pod - using the stock IC hole..I havn't noticed any issues... I would assume this setup is basically the same as stock with more air and a more direct flow into the CAI area however the differnece is that its not in direct airflow at the bar...yet I would assume the 3" pipe would allow a lot of air to get in...maybe its enough of a baffle to avoid the issues being discovered.

Its not totally sealed...it has gaps on the sides..I never worried as I assumed so much air was getting in there it would keep away the hot engine air...after all that was the aim of the box...I wont bother to seal it up perfectly then

Maybe you don't need such a good flowing filter under such circumstances...as you have so much air its not really a flow issue. I have been using a UniFilter which has less flow than the pod mentioned but filters much better...just another thing to consider IMO...

Id say, its not so much that air being rammed into a inlet system is bad, its just, the engine as a complete unit inside the car, was tuned on a dyno with a certain pressure in front of the turbo mouth, at a certain altitude, with certain fuel etc… so EVER changing those parameters is going funk with things; someone here actually measured the difference in AFM outputs with the engine off, rolling down the road! - gonads of tungsten. You’d think if you TUNED the car with that extra pressure it would be fine. Hahah how bout a MAP sensor near the AFM to trim output as pressure goes up? Or directly trim the AFM output voltage as wheel speed sensor output rises lol. Wait, that might not be so hard, don’t stock ECU’s register relative pressure / altitude every time you start your car to compensate? Hrmmm.

Make me wonder how other groups of people have gotten around the issue. Ninja 500’s with those ram air snorkels at the front, GTHO’s with “shakers”. Hrm maybe carbs aren’t effected soo much, as fuel delivery is based on air speed over a venturi; with the engine only swallowing a certain amount of air. Wonder if a jet engine gets this compressor reversion… jk

Troy a slightly unsealed box would probably suit best, biggest disadvantage being some warm air creep into it, when the vehicles still, hrmm.

Wooah, sorry, mental gibberish, too much strong coffee!

- Michael

[midnight]

this may sound like a stupid idea and might cause more tuning issues, but what about mounting the afm after the turbo?

then the rejected air from the compressor can do whatever it wants.

[Guilt-Toy]

Well Said GeeTR

Maybe just a aluminium cover for the front bar with holes drilled in it to restrict the air flow so it does not ram air into the AFM.

That might be the go...

[Ronin 09]

I'd be more worried about the fundamentals...

filtering of air with the filter hanging directly in the duct?

how well do pod filters really work?

i personally wouldn't want to risk my motor by ingesting more particles that strictly necessary... plus by 'boxing' up the duct, how is it any more effective than boxing up the filter in the engine bay?

plus, if you're sitting in traffic, the 'hot' engine air would be so quickly purged with a ducted box in the engine bay anyway.

you might make 2kw more.

[GeeTR]

Well Said GeeTR

Maybe just a aluminum cover for the front bar with holes drilled in it to restrict the air flow so it does not ram air into the AFM.

That might be the go...

i personally wouldn't want to risk my motor by ingesting more particles that strictly necessary... plus by 'boxing' up the duct, how is it any more effective than boxing up the filter in the engine bay?

plus, if you're sitting in traffic, the 'hot' engine air would be so quickly purged with a ducted box in the engine bay anyway.

you might make 2kw more.

Thanks Guilt-Toy.

Plate with holes yah, but then at low vehicles speeds, you’ve lost a lot of the benefit hrmm *ponders*

Ronin - true, having more air flow around the filter would theoretically mean its going to see more dirty air… or does it.

A engine bay exposed filter would have a large amount of air around it as well i woulda thought. Through the front bars largest opening, between headlights, through the radiator, off the firewall, then prolly straight down underneath the car… “Would” a boxed, and ducted pod see more air flow then a pod exposed in the engine bay at 100km/h? Dunno

“Boxing up the Duct” > I think there’s a little confusion as well. I’m talking about boxing the filters in a GTR engine bay, so from the passenger strut tower all the way forward to where the charcoal canister is (was)

Put a 4” hole ( where the battery tray is on the other side.. but of course, we are talking the passenger side here) that would be big enough to force most of the air through the stock bar vent, into that boxed area.

Guilt-Toy, i belive is moving the actual filter to the front bar.

I’m thinking I can remove some of this heat soak, you mention, by having the box sealed 100% and high density foaming every surface inside. Moot maybe, but I still wonder, when I hold a 60 degree coffee in a cup made from 3-4mm of polystyrene.

Please don’t misjudge my enthusiasm, I think its documented, and fairly common sense how to get around the problem, tojust make it simply "work" I’m just tongue in cheek interested in how one would make the perfect setup if one had time

- M

Edited October 19, 2006 by GeeTR