cutsom inlet pipes

[juggernaut201]

so i know alot of us have made our own intake (inlet) pipes... lets see some pics and what you used to do so .... once i figure out how to post pics i will 2 lol [Confused]

[Charles]

http://www.audizine.com/forum/showth...ghlight=intake

I just did this today. Went to a local diesel truck parts store to get a 3", 90 degree mandrel bent pipe (which I plan to powder coat to make look prettier) for 18 bucks. Went to Pep Boys and found a Spectre 3" to 3" coupler and a 3" to 2.5" reducer (7 bucks each). I also picked up a universal K&N from there too (63 bucks :( ). From there, I removed the air box and started fitting things. I had to cut the pipe maybe 4 inches on each end (it helps if you own a grinder with a cutting wheel), then I just put everything together and tightened her up (don't forget to hook up the MAF in the right flow direction).
From here I might change the filter to fit a little better. The current one is about 6 inches long, so a 5 incher might fit better. I also might add a 45 degree coupler where the MAF connects to the pipe, so I can angle the filter a little better..mostly for looks.
As for a heat shield, I'm thinking of making a Plexi/Sheetmetal hybrid. Sheetmetal for the vertical portion, closest to the turbo (with A/C ducting insulation, painted black) and plexi for the "cover", or horizontal piece. I think it would look cool if you can see the filter. Might be cheesy..we'll see.

For performance...pretty sure it's nil, but you can def hear the DV bleed off and the turbo whine is much more noticeable.

Good luck! It's not that hard to do.

[NorcalPB]

From Keith@APR

To answer your question I was researching the thermal conductivity of both materials, an aluminum and polymeric materials or plastics.

My research led me to a great explanation of why metals conduct heat more freely than plastics.

http://www.madsci.org/posts/archives...3825.Ph.r.html

"In plastic materials, there are no free electrons, there is no real atomic order to support phonon transport or energy, so heat transfer is the slowest. In plastics molecular rotation, vibration, or movement transfers heat."

All metals contain free electrons and have a nice and neat atomic order. This means the atoms are neatly stacked in line and/or on top of eachother and each atom shares electrons with eachother or forms an "electron cloud".

Plastics are not stacked neatly at the atomic level and do not share electrons. This inhibits both thermal conductivity as well as electrical conductivity.

Due to the wide variations of plastic and plastic composite materials its difficult to find the assignation of thermal conductivity to the material our oem induction systems are made of.

Aluminum is pretty easy as a general rule: Thermal conductivity (300 K) 237 W·m−1·K−1

Actual thermal conductivity testing would need to be accomplished to gain the exact differences between the 2 materials but I trust the explanation listed above and the research its derived through.

So, in short, aluminum or any metal would be a poor choice for an induction system over plastics.

[agkellyboy]

From Keith@APR

Why mine is coming off

[Charles]

Which is why I plan on getting my piping powder/ceramic coated.

Still, I did mine for a few reasons:
-replacing the stock filter with a reusable filter
-removing the stock airbox to the filter is easier to access
-the louder sound of the turbo and DV.

Did I lose hp by doing this? Maybe, but it's not enough to really override the reasons stated above. Still, if this heat conduction issue was such a problem, I would think I'd notice tuners shying away from the use of metal piping in the fabrication of intakes and intercooler tubing. I don't see that happening.

[NorcalPB]

Which is why I plan on getting my piping powder/ceramic coated.

Still, I did mine for a few reasons:
-replacing the stock filter with a reusable filter
-removing the stock airbox to the filter is easier to access
-the louder sound of the turbo and DV.

Did I lose hp by doing this? Maybe, but it's not enough to really override the reasons stated above.

I seriously doubt you did. With proper shielding the filter can run really cold (but this is rather insignificant as pre-turbo temperatures are meaningless and have no affect on the turbo's preset burning temperatures. So basically on a turbo charged car all you want is as much air flow as possible. Given the fact that an open filter allows more flow than the air box, you definitely didn't lose hp.

[juggernaut201]

im lookin for how someone did one on a carbonio .... the bends suck lol

[CZA420tAvant]

^ agreed I would like to see this also.

[Apache_Mech.24]

im lookin for how someone did one on a carbonio .... the bends suck lol

Its not custom but it is the GSG inlet pipe....

[p1nk50ck]

Did I lose hp by doing this? Maybe, but it's not enough to really override the reasons stated above. Still, if this heat conduction issue was such a problem, I would think I'd notice tuners shying away from the use of metal piping in the fabrication of intakes and intercooler tubing. I don't see that happening.

i don't have a heat shield yet, but when i swapped my stock airbox back in before dropping my car off for service, the car defiitely felt peppier, and sounds ever so slightly deeper with the stock box on. granted "feeling peppier" doesn't really mean anything, it could be completely psychological.

im lookin for how someone did one on a carbonio .... the bends suck lol

for those of you who want to make it fit the stock box or the carbonio, i might suggest using a 3" 45 degree silicone coupler, instead of the 3" straight silicone coupler to attach the pipe to the maf housing. it might require some test fitting, and cutting the pipe down a little more, but it'll give that extra bend that your stock rubber pipe has (actually, the stock rubber pipe is more like a short straight pipe with 2 45 degree bends at each end) a 45 degree silicone coupler will cost significantly more than the regular straight coupler. i just ordered mine last night, so it should be getting here shortly. i'll have some more info when everything comes in.

[DownUnderSLine]

CARBONIO v2.0 TEASER. DIY thread coming soon.....

[p1nk50ck]

so i know alot of us have made our own intake (inlet) pipes... lets see some pics and what you used to do so .... once i figure out how to post pics i will 2 lol [Confused]

just started a redesign of mine. i'll have some pics up in a couple of days.

CARBONIO v2.0 TEASER. DIY thread coming soon.....

i considered going this route as well. it would be a lot easier to custom fit. let us know how it goes.

[p1nk50ck]

Here's the stuff.

90 degree aluminum 3" intercooler pipe

3" to 2.5" silicone reducer

3" silicone coupler

Amsoil Ea Filter part number: EaAU3051 (3" opening)

HKS clone foam filter - 3" opening




I cut the aluminum pipe down using the stock rubber pipe as a template, and painted it using a high temp matte paint (it can withstand 600 degrees Fahrenheit constant temperature, and spikes of up to 1200 degrees F). I wanted to powdercoat the pipe, but my hookup flaked out, and i got impatient.

i also exchanged the 3" silicone coupler for a 3" 45 degree silicone coupler

i've also decided to go with the amsoil filter instead of the fake hks.



i'll try to install this tomorrow, and post some pictures of it on the car

[juggernaut201]

sounds good i think im going to try that silicone intake pipe

[Charles]

I'll be interested in how your setup turns out, Pink. I Was thinking of going 2, 45 degree bends, test fitting them, then welding them up (or maybe just using another 3"-3" coupling) instead of 1, 90 degree.

I just got flashed yesterday and the tech mentioned that it might not be a good idea to have the filter so close to the MAS, as it could cause some turbulence and cause erroneous readings. He suggested, having the pipe make a u-turn so it would be:

filter>u-turn pipe>MAS>pipe to turbo inlet.

Thoughts?

[Hyphy]

Here's the stuff.

i'll try to install this tomorrow, and post some pictures of it on the car

yes please..

[p1nk50ck]

I'll be interested in how your setup turns out, Pink. I Was thinking of going 2, 45 degree bends, test fitting them, then welding them up (or maybe just using another 3"-3" coupling) instead of 1, 90 degree.

I just got flashed yesterday and the tech mentioned that it might not be a good idea to have the filter so close to the MAS, as it could cause some turbulence and cause erroneous readings. He suggested, having the pipe make a u-turn so it would be:

filter>u-turn pipe>MAS>pipe to turbo inlet.

Thoughts?

interesting setup, but when you place the maf so close to the turbo, i would assume that there would also be just as much turbulent air (turbo sucking in). i would also be worried about the heat given off by the turbo which may damage the maf. carbonio, evolution motorsports, AEM, GSG, and other aftermarket companies have been running the filter right off of the maf pipe, and i haven't heard of any issues (however that doesn't mean it doesn't happen)

i do know that too much turbulent air and a sensitive maf can lead to CELs. it's a big problem with is300s. a lot of people try to retain the factory "ram air" piping (similar to our audi piping) when installing a short-ram intake. the ram air pipe would aim the cool air from the front grille directly onto the filter right behind the passenger side headlight. while a good idea in theory, this setup caused CELs. once you removed the ram air pipe, the CEL went away.

i want to let forum readers know that i'm not an engineer. i'm just an auto enthusiast who likes to tinker with things. i try to read up on as much stuff as i can, and gain an understanding of mechanics to the best of my abilities. if anyone has any further insight, please feel free to chime in or correct me if i'm wrong.

yes please..

i'm at work right now, and i didn't expect it to snow today. i don't have a garage, so i'll have to try and install it on my way out of the office. it shouldn't take more than a couple of minutes, but i'm in a suit, and i'm too much of a pansy to let my suit get ruined just to install an intake pipe. i'll see what i can do.

[RedS-line]

so whos gonna make a diy on the silicone pipe? :)

[juggernaut201]

CARBONIO v2.0 TEASER. DIY thread coming soon.....

if he doesnt i will .... i cant wait my stuffs in the mail i did one thing dif tho i went 3 inch 45 degree coupler and then the 3 to 2.5 90 degree

[juggernaut201]

he inlet pipe i made previously just isnt doing it for me

[DownUnderSLine]

so whos gonna make a diy on the silicone pipe? :)

Have been very busy with work this week - will do a quick DIY on it tomorrow night.... unless Juggernaut beats me to it !

[juggernaut201]

haha my parts arnt here yet haha so the floor is all yours lol

[juggernaut201]

CARBONIO v2.0 TEASER. DIY thread coming soon.....

is today the day for the DIY? lol my parts are in but i wont have time to make it fit till 2morro nite lol

[bhvrdr]

I seriously doubt you did. With proper shielding the filter can run really cold (but this is rather insignificant as pre-turbo temperatures are meaningless and have no affect on the turbo's preset burning temperatures. So basically on a turbo charged car all you want is as much air flow as possible. Given the fact that an open filter allows more flow than the air box, you definitely didn't lose hp.

Temps of air brought in through the MAF do have an impact on intake air temps taken at the manifold post turbo and intercoolers. Proof of this is taking simple intake g/s readings on a 50 degree day versus on an 80 degree day.

cheers! Mike

[DownUnderSLine]

is today the day for the DIY? lol my parts are in but i wont have time to make it fit till 2morro nite lol

YES.....YES IT IS....

http://www.audizine.com/forum/showthread.php?t=261082