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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Carbon fiber or Polyurthane



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      09-19-2012, 11:44 AM   #1
Vel13ez
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Carbon fiber or Polyurthane

So I was looking at two different splitters for my car one carbon fiber and the other polyurethane now I don't really know the difference ? Which one is better ? Which ones Stronger?? Is there a difference?

Now some of you are going to be like "google it " but I want first hand experienced responses. Tell me what one u think is better !!
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      09-19-2012, 01:34 PM   #2
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carbon fiber is strong for how light it is.
compared to the same thickness and weight of PUR (polyurthane) it will be stronger.
most people buy carbon fiber to keep them bare carbon with no paint.
if you are going to paint it is wasting your money to get carbon.
saying that, the price of PUR painted vs bare carbon, will be very close.
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      09-19-2012, 03:22 PM   #3
Vel13ez
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Quote:
Originally Posted by JYohay
carbon fiber is strong for how light it is.
compared to the same thickness and weight of PUR (polyurthane) it will be stronger.
most people buy carbon fiber to keep them bare carbon with no paint.
if you are going to paint it is wasting your money to get carbon.
saying that, the price of PUR painted vs bare carbon, will be very close.
That's exactly what I had forgotten to put I am painting it so like u said carbon would be a waste cuz I do want to paint it, Thanks again man !!
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      09-19-2012, 03:41 PM   #4
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CF is more aesthetically appealing to some. If you're going to paint it, get the poly. CF is probably more expensive anyway.
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      09-19-2012, 05:06 PM   #5
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while carbon fiber is very strong in tensile strength, it is very brittle in compressive strength. what that means is that when you bottom out your splitter, carbon fiber is much more likely to crack and shatter, where as poly will bend a lot more before it breaks.

Poly will be more durable in everyday use. I'd much rather use poly in a place where it might see some impact.
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      09-20-2012, 12:56 AM   #6
Vel13ez
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Quote:
Originally Posted by mike-y
while carbon fiber is very strong in tensile strength, it is very brittle in compressive strength. what that means is that when you bottom out your splitter, carbon fiber is much more likely to crack and shatter, where as poly will bend a lot more before it breaks.

Poly will be more durable in everyday use. I'd much rather use poly in a place where it might see some impact.
Thanks for this I am going with poly better for the bottom parts like the splitters things like that thanks again
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      09-20-2012, 01:48 AM   #7
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CF is for the posers LOL
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