That'd be as smart as using aluminum headers. 
Heat and ABS plastic
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From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Heat and ABS plastic
I've considered using the "fake" ABS plastic covers as sold by MAMW. In my case, I'd cutout the exhuast hold and plumb them with real exhaust.
Even a 1/4" gap was left around the pipe that went through the "exhaust hole", would heat cause problems?
Not sure about the properties of ABS plastic and/or exhaust pipe temps. I also know the pipe would have to "float" in the hole since exhaust must float. And, I don't know if the pipe would occasionally come close to -- or in contact with the ABS. But, this should be considered in any response.
The paint ON the covers might also be a point for discussion!
Thanks!
FYI: Exhaust heat would NOT be blowing on the covers. The exhaust pipe would NOT sit behind the entire cover (it would come from under the car and straight out the hole). This means the gap between the exhaust pipe and the plastic would be the main point of heat radiation.
Also, the side pipes exits would be ABOUT the same distance from the engine as the pipes under a urethane bumper are -- if that helps determine estimated exhaust PIPE temps.
Even a 1/4" gap was left around the pipe that went through the "exhaust hole", would heat cause problems?
Not sure about the properties of ABS plastic and/or exhaust pipe temps. I also know the pipe would have to "float" in the hole since exhaust must float. And, I don't know if the pipe would occasionally come close to -- or in contact with the ABS. But, this should be considered in any response.
The paint ON the covers might also be a point for discussion!
Thanks!
FYI: Exhaust heat would NOT be blowing on the covers. The exhaust pipe would NOT sit behind the entire cover (it would come from under the car and straight out the hole). This means the gap between the exhaust pipe and the plastic would be the main point of heat radiation.
Also, the side pipes exits would be ABOUT the same distance from the engine as the pipes under a urethane bumper are -- if that helps determine estimated exhaust PIPE temps.
Last edited by GREGGPENN; Jan 26, 2006 at 12:48 AM.
Drifting
Joined: May 2003
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From: Charlotte NC
St. Jude Donor '05
ABS is a thermoplastic which means that you heat it until a glass transistion temperature and form it into shape. Its working temp is much lower than the glass transisition temperature.
I don't know the properties of abs specificallly off the top of my head but I do know that the group of polymers it belongs to generally doesn't have Tglass much hotter than say boiling water. I know also that you can severly degrade that group of polymer by overheating so... its not a good idea to use this in a area where you'll deal with much more than 100 C
I don't know the properties of abs specificallly off the top of my head but I do know that the group of polymers it belongs to generally doesn't have Tglass much hotter than say boiling water. I know also that you can severly degrade that group of polymer by overheating so... its not a good idea to use this in a area where you'll deal with much more than 100 C
Thread Starter
Race Director
Joined: Nov 2003
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From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Originally Posted by Alvin
ABS is a thermoplastic which means that you heat it until a glass transistion temperature and form it into shape. Its working temp is much lower than the glass transisition temperature.
I don't know the properties of abs specificallly off the top of my head but I do know that the group of polymers it belongs to generally doesn't have Tglass much hotter than say boiling water. I know also that you can severly degrade that group of polymer by overheating so... its not a good idea to use this in a area where you'll deal with much more than 100 C
I don't know the properties of abs specificallly off the top of my head but I do know that the group of polymers it belongs to generally doesn't have Tglass much hotter than say boiling water. I know also that you can severly degrade that group of polymer by overheating so... its not a good idea to use this in a area where you'll deal with much more than 100 C
Now... What's the highest exhaust PIPE temp you'd expect to see at the rear of a vette... on a hot summer day.... in city traffic.... at a stop light... with no wind.... yadeeyadeeyadee, blah blah blah.....
Thread Starter
Race Director
Joined: Nov 2003
Posts: 12,221
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From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
But.... but... Everyone's trying to figure out if/how they can use aluminum headers in another thread. Right now!!!!!!!!! I saw it.
How come I'm not the only idiot in this forum!
How come I'm not the only idiot in this forum!
Thread Starter
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Originally Posted by GREGGPENN
I've considered using the "fake" ABS plastic covers as sold by MAMW. In my case, I'd cutout the exhuast hold and plumb them with real exhaust.
Even a 1/4" gap was left around the pipe that went through the "exhaust hole", would heat cause problems?
Even a 1/4" gap was left around the pipe that went through the "exhaust hole", would heat cause problems?
The important thing is not what the surface temp of the pipe would be, but how hot it would radiate 1/4" away. In direct debate, I'm not sure that point was addressed.
BTW: I know exhaust pipes have to "float" and that the 1/4" gap would be variable.
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