luke2152
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| posted on 27/12/15 at 10:08 PM |
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perspex temperature limit
Need to make a plate to bolt coil on plugs to the valve cover. Not sure if perspex or similar would be up to the job. I think its well above its
recommended in use temperature but it doesn't need to be very strong as long as it doesn't actually melt.
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David Jenkins
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| posted on 27/12/15 at 10:14 PM |
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I don't know the exact temps, but it does go soft enough to mould at 100C. So it doesn't melt, but it would have no strength.
Page 11 of this guide should help - there's a
nice chart at the bottom of that page. Page 37 also gives a max working temp of 80 - 85C.
[Edited on 27/12/15 by David Jenkins]
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MikeRJ
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| posted on 27/12/15 at 10:39 PM |
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Aluminum is surely a better choice, easy to work with, and won't melt or soften at cylinder head temperatures, and doesn't become very
brittle at low temperatures.
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Slimy38
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| posted on 27/12/15 at 11:41 PM |
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There must be some plastics capable of doing it, I'm sure I've seen production cars with a similar concept. But as I've found out
relatively recently, 'plastics' is quite a large spread of products!
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twybrow
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| posted on 28/12/15 at 12:06 AM |
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OEMs use thermoplastics reinforced with very short glass fibres in them for a range of non or semi structural applications. The range of plastics is
vast! As above, I would suggest aluminium or a composite sheet might be worth a look.
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Bluemoon
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| posted on 28/12/15 at 09:01 AM |
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G10 sheet?
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trextr7monkey
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| posted on 29/12/15 at 12:07 AM |
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Check out polycarbonate something like "Lexan" it takes much more heat to get it warm enough to bend
http://www.flickr.com/photos/14016102@N00/ (cut and paste this dodgey link)
Our most recent pics are here:
http://s129.photobucket.com/albums/p211/trextr7monkey/
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coyoteboy
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| posted on 3/1/16 at 06:11 AM |
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We've had PMMA creep at 40C, fwiw
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jacko
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| posted on 11/1/16 at 07:41 PM |
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I used lexon on my rocker cover and it warped with the heat of the exhaust manifold
I changed it to aluminium
jacko
 
engine 2
[Edited on 11/1/16 by jacko]
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