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  1. #1
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    aluminum exhuast?

    what do you guys think about doing a aluminum exhaust from the down-pipe back? or maybe half stainless and half aluminum?
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    why?

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    Click here to enlarge Originally Posted by LostMarine Click here to enlarge
    why?
    lighter weight and different sound.
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    Click here to enlarge Originally Posted by lamia2super Click here to enlarge
    lighter weight and different sound.
    Who is going to do it?

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    Aluminum get very fragile if heated up, especially the welds, try throwing a soda can on the fire (which isn't as hot as your cats) and see. I would think there is a reason lightweight exhaust systems are made of titanium...
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    997.1 tt
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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    Who is going to do it?
    just a thought
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    Click here to enlarge Originally Posted by xbox_fan Click here to enlarge
    Aluminum get very fragile if heated up, especially the welds, try throwing a soda can on the fire (which isn't as hot as your cats) and see. I would think there is a reason lightweight exhaust systems are made of titanium...


    Two flaws with what you're saying. 1) the piping you would make the exhaust out of would be muchhh thicker than a coke can. 2) if it a complete exhaust I doubt he would be throwing cats on it anyway so the heat level that a cat reaches would never exist in the exhaust. I have been running a full aluminum exhaust on my k-swapped hatch and have had zero problems. It all comes down to the quality of the aluminum, how well it is built, and how well it is mounted to keep the stress down on the piping.
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    Click here to enlarge Originally Posted by lamia2super Click here to enlarge
    Recording isn't super clean but that doesn't sound bad at all.

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    Click here to enlarge Originally Posted by bakeme521 Click here to enlarge

    Two flaws with what you're saying. 1) the piping you would make the exhaust out of would be muchhh thicker than a coke can. 2) if it a complete exhaust I doubt he would be throwing cats on it anyway so the heat level that a cat reaches would never exist in the exhaust. I have been running a full aluminum exhaust on my k-swapped hatch and have had zero problems. It all comes down to the quality of the aluminum, how well it is built, and how well it is mounted to keep the stress down on the piping.
    of course one wouldn't use that thin metal Click here to enlarge I was trying to make a point, aluminum is not heat resistant (as steel) and gets very brittle if heated up, so aluminum welds are not strong at all.

    I guess it can be done (anything can usually) BUT I just wanted to point out that there is a reason to use other materials than aluminum for exhausts. I think enrita and dzenno had numbers for exhaust temps before and after the turbos, check that against aluminum specs before building anything...
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    997.1 tt
    Kline 200cell exhaust
    997.2/GT2RS IC's
    Cobb E85 custom stage3 tune by Mitch
    ID1000 injectors
    Sachs stage 2.5 clutch

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    Click here to enlarge Originally Posted by xbox_fan Click here to enlarge
    of course one wouldn't use that thin metal Click here to enlarge I was trying to make a point, aluminum is not heat resistant (as steel) and gets very brittle if heated up, so aluminum welds are not strong at all.

    I guess it can be done (anything can usually) BUT I just wanted to point out that there is a reason to use other materials than aluminum for exhausts. I think enrita and dzenno had numbers for exhaust temps before and after the turbos, check that against aluminum specs before building anything...
    Ok I dont want to sound like a keyboard racer here but I dont think it would be a good idea. The exhaust temperature is in the 1000's. At about 400F aluminum strength takes a $#@!. I can tell you that you will be on borrowed time if you did this. Aluminum also has a very low thermal conductivity, so everything in your engine bay and under your car will get hotter.
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    ^still think its a neat idea or maybe do like half stainless(midpipes) and half aluminum
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    Click here to enlarge Originally Posted by lamia2super Click here to enlarge
    ^still think its a neat idea or maybe do like half stainless(midpipes) and half aluminum
    It's interesting to explore other ideas but best to stick with tried and true metals or if you want to get exotic go titanium.

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