Playing around with my M42 intake

[///digitalme]

Fiberglass would be one of the best materials. I'd also look into making a fiberglass tube to replace the metal tube. Anything to resist heatsoak will be beneficial, though I seriously doubt you'll get any worthwhile hp out of this.

Matt

i like the factory box better but its been so hard to come accross a cheap one....so until i find one at the right price i think ill make a heatshield...honestly i hate the cone filter after my car is running for a while it seems its getting too much hot air in and struggles a bit

[WhatWentWong]

Your stock intake, if all the bits are there, would draw air in from the front grille behind the LH high beam. Air does not get any colder than that. Do yourself a favor and go hit a yard and pick up all your original bits for $20. Intake air is always moving, so a bit of transient time through the stock intake tract in a 'hot' engine bay isn't the end of the world. You are replacing plastic parts with a big aluminum tube. I think you just introduced more heat. The biggest restriction flow wise in the M42 is the barn door AFM anyhow.

Both iterations of your cone filter location are disasterous. Those filters need to be oiled to be effective, and having it in those locations will just end up caking your filter with dirt and grime, mixed with water, always moist, and never gets to dry. Before long it'll smell like a vacuum cleaner that just sucked up vomit! Just look and see how dirty your engine bay is. A cone filter anywhere in the engine bay is not spared the same fate.

Stock airbox, stock filter. End of chapter.

[iamsam]

Your stock intake, if all the bits are there, would draw air in from the front grille behind the LH high beam. Air does not get any colder than that. Do yourself a favor and go hit a yard and pick up all your original bits for $20. Intake air is always moving, so a bit of transient time through the stock intake tract in a 'hot' engine bay isn't the end of the world. You are replacing plastic parts with a big aluminum tube. I think you just introduced more heat. The biggest restriction flow wise in the M42 is the barn door AFM anyhow.

Both iterations of your cone filter location are disasterous. Those filters need to be oiled to be effective, and having it in those locations will just end up caking your filter with dirt and grime, mixed with water, always moist, and never gets to dry. Before long it'll smell like a vacuum cleaner that just sucked up vomit! Just look and see how dirty your engine bay is. A cone filter anywhere in the engine bay is not spared the same fate.

Stock airbox, stock filter. End of chapter.

ha ha!! you are quite the anti-cone filter activist!! ;)

But thanks for the input, it all makes sense, and I think I will either do a really good heat shield with the cone filter where the stock box was, or just revert to stock. BTW, i never took any stock plastic out, the car came with the cone filter. As a matter of fact, the car came like this:

[Huff]

Don't drive it in a large rain storm..

[iamsam]

heh heh...

[iamsam]

OK ladies, what do you guys think about this? worth it? http://cgi.ebay.com/ebaymotors/BMW-E...ht_1497wt_1165

EDIT: well, at $88, probably not.... but if I made one myself?

[kenika65]

Just cut a hole in your hood and stick it through there, ya know what just loose the hood!

[iamsam]

i could lose a good 30-40lbs.... ;)

[schwannman]

ha ha!! you are quite the anti-cone filter activist!! ;)

But thanks for the input, it all makes sense, and I think I will either do a really good heat shield with the cone filter where the stock box was, or just revert to stock. BTW, i never took any stock plastic out, the car came with the cone filter. As a matter of fact, the car came like this:
[http://lh5.ggpht.com/_qHca2oE64Mc/SHdUcztiwZI/AAAAAAAAAnA/srNCDG128s4/s640/2008-07-10%20036.jpg[/IMG]

i come from the honda scene (rsx) and probably 80% of modded rsx's have the filter where yours is, its the second most common (besides stock) place on the car. as long as you keep it clean, and like somebody said dont drive thru a big puddle! you should be okay, i had my filter there through winter and it got dirty but never damaged, and that was with no fender liners (aka no protection at all) kudos on making your own intake i like it.

[iamsam]

yeah when I got the car it was super riced out. But that's another story....

[Jesse30]

ok, heat does not rise. heat radiates.

so fact of the matter, you are still drawing in hot air. and without that lower shroud/cover, you are not getting anymore air up there.

do you really think you're going to out engineer the bmw engineers? at least route it to the front grills. putting it lower does nothing in our cars.

[mikeedler]

I'm not sure how much it rains by you, but in Germany where it rains all the time-- that would not work good-- it would fill up with water and run like doo doo.-- and the water from the tires is thrown right into it too there.

[///digitalme]

anyone have a picture of a heatshield for an m42??

[getouth]

get a k&n drop in and call it a day!!

[iamsam]

dude it is a K&N.