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fiberglass and heat


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blufab 
Copper - Posts: 62
Copper spacespace
Joined: July 25, 2005
Location: United States
Posted: March 21, 2006 at 3:11 PM / IP Logged  
What is the greatest temperature a figerglass piece would stand up to w/o warping? I was interested in building a engine bay cover and was wonder would it would be worth building one that will be there doing day to day driving.
crazyoldcougar 
Copper - Posts: 185
Copper spacespace
Joined: March 03, 2006
Location: Canada
Posted: March 21, 2006 at 4:15 PM / IP Logged  
fiberglass isnt really effected by heat...if it is too close to the engine or the exhaust manifold it may blister the paint but once cured fiberglass isnt affected by heat..at least not the kind that would build up in an engine bay...
Fiberglass Guru.
realitycheck 
Silver - Posts: 751
Silver spacespace
Joined: September 09, 2004
Posted: March 22, 2006 at 8:16 AM / IP Logged  
Yeah boat engine covers are all fiberglass, inboards anyway. With a gel coat that never has any problems.
Learning the trade one fiberglass creation at a time!
bellsracer 
Silver - Posts: 703
Silver spacespace
Joined: January 14, 2006
Location: United States
Posted: March 26, 2006 at 11:47 PM / IP Logged  

It also depends on what kind of fiberglass you are using too.

FG high in silica can take up to about 1000* F consistantly.

Fine needle FG can usually take up to 800* F consistantly

Your AVERAGE FG will take about 500* F consistantly.

We hope this helps. Ganbatte ne. (Good luck)

Never send your ducks to eagle school.
The difference between ordinary and extraordinary is that little extra.
The 3Ls of life: Learn from the Past, Live for the Present, Look to the Future.
torquehead 
Copper - Posts: 144
Copper spacespace
Joined: January 15, 2006
Location: United States
Posted: March 27, 2006 at 7:40 PM / IP Logged  

Also, being the heat is a concern, you can wrap your headers/exhaust manifold with "Header Wrap" which can be bought from places like SummitRacing.com or Jegs.com.  This wrap, when applied correctly to the headers/manifolds can lessen the engine compartment heat substantially.  Especially because this is where most of the heat comes from.  Also, Dynamat makes "Hoodliner", when your final bay cover is finished, adding Hoodliner underneath will also help.  By the way, like REALITYCHECK mentioned, if you use gelcoat instead of paint it will not fade/discolor for a long time.  I made a fiberglass valve cover for a Toyota R-22(I think) 4-Cyl engine that was used in a "Dwarf-Midget" race car for lightweight purposes.  We used gel coat on the fiberglass to inslulate the paint job that was actually visible.


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