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Which has better air flow: Metal or Plastic?

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Old 12-31-2001, 08:55 AM
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Which has better air flow: Metal or Plastic?

Which one would be best to use when making a custom intake to have maximum air flow. Metal (galvanized steel or something similar) or a plastic material (PVC)? Just curious.
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Old 12-31-2001, 09:10 AM
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Are you wondering about it's smoothness on a molecular level for that extra .1 cfm or so??

Well if there's no problems or limitations with working with either material, I'd go with plastic just because it stays cooler. Other than that I'd pick whichever one is easier to work with. PVC piping is probably smoother than the inside of furnace ducting-like galvanized pipe, if that's what you're comparing.
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Old 12-31-2001, 09:14 AM
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Originally posted by Bman
[BI'd go with plastic just because it stays cooler.[/B]
Good point. I forgot about that.
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Old 12-31-2001, 01:08 PM
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Don't use PVC pipe under the hood, too much heat causes it to release some funky gases that may be harmful to you or your engine.
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Old 12-31-2001, 01:37 PM
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Originally posted by Weasel
Don't use PVC pipe under the hood, too much heat causes it to release some funky gases that may be harmful to you or your engine.
Hmm, good point number 2! I think I've heard of this before. I guess you'll have to use some heat-resistant plastic like they use already. Maybe consult a local plastics shop on what specific kind(s).
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Old 12-31-2001, 08:44 PM
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I'd go with metal coated with Teflon! Spray some PAM cooking spray in your intake and you've got a nice, smooth, slick, non-stick intake! And I think PAM is flammable!
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Old 01-01-2002, 08:36 AM
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Originally posted by Weasel
Don't use PVC pipe under the hood, too much heat causes it to release some funky gases that may be harmful to you or your engine.
ya i was gonna use plastic but that's why i decided against it.
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