Intake setup...

[goldstar]

Since the VAF responds to the VOLUME of air flowing through it, any mod to the intake system that reduces the resriction to air flow (reduces negative pressure) between the atmosphere and the air filter will yield a performance increase by increasing the volume of air "sensed" by the VAF. However, as shown in the photo, the inlet side of the air filter, although behind the headlight, will still draw in mostly hot, underhood air. Since HP decreases as a function of INCREASING intake air temperature, if the temperature increase offsets the increase in volume flow, there will be no net performance gain and perhaps even a loss compared with the stock system.

Reference: http://www.wellsmfgcorp.com/counterp...erpoint3_3.pdf

Happy Motoring!

[91ProtegeLX]

lol....well goldstar set it straight.....but it looks to be a little heat sheild there to help block out the underhood hot air.

So the verdict......do that mod, build a heatshield that seals completely, and remove your headlight and you may see some slight gains!

[darkjedi]

Why after investing in a cool BP swap not just buy a cool aluminum intake with cone filter and all , i have read somewhere here that you lose power with a modified intake , personally i think its but has anybody had an experience with this ?
im about to buy the K&N cleaner kit but if im losing power with a cone filter i might save it for something else.
I saw in another forum that in Formula 1 they use paper interesting ill try to find the link or pic.

[D323]

Paper? Special kind I hope, b/c regular paper doesn't flow at all.

Yes aftermarket intakes reduce low end tq if you leave off the H-box (helmholtz resonator)

There have been many posts about this, so just search and you will see why power loss was experienced by some.

[FE3-323]

yes you only lose power by taking out the H box as donnie said

[darkjedi]

thanks for the tip, i guess i needed confirmation on the h box thing.
but im no ****ting you guys about the paper i saw it somewhere
here a link

http://www.formula1.com/insight/technical_analysis/team/2005/7/94.html

of course for the Bahrain race you can understand , but i saw a pic of an f1 engine for an european circuit , but even in bahrain there are many layers of paper , i though that f1 engines where made for use on short periods of time and they didnt care about wear , but if they are using paper there might be a secret to it

or just rules & regulations probably.

[danielb927]

where does the air box get its air on the stock configuration? in other words where does that little snakey tube coming out of the bottom of the box end? talking 1st gen here, its different in the later models i think.

[tom]

Hbox or no Hbox. That is the question. HMMMM I have to say, Ive been running mine without this hateful little box for a year and I see and feel absolutely no difference at all. My CAI makes a much lounder sucking sound than the stock setup, but to say I am loosing power because I'm not using it? I just don't feel it.....
I suppose it's been proven on the dyno, but damn if I can tell the difference. Of course, my car is an automatic, so it's not going to win any land speed records.
As for your specific setup, why not just have some fun and experiment. Your not going to hurt anything. You may not gain huge horsepower but you may get a bump in power at an RPM that you have not felt before. Thats's what I noticed. We all know huge power is only going to come in the form of a turbo setup.

[goldstar]

What's so odd about F1 engines using paper air filter elements-assuming that they do? Furthermore, why would you think that Formula 1 engines wouldn't use air filters at all? It wouldn't make sense to leave an engine that highly stressed and expensive open to the ingestion of random debris. Formula 1 engineers do care about wear and that's precisely the point.

Happy Motoring!

[D323]

I saw no mention of paper used as a filter... maybe paper based filters, now those do exist as goldstar mentioned.

The only thing I can think of is that they were out at the track and needed a quick fix to keep the motor from sucking in debris, so the stuck a piece of paper over it - a choice that would flow very poorly and hinder power, but one that would save the engine.