DIY glass fibre plenum chamber? Bad idea?

[Espen Hilde]

B:I have seen some form of clay used for this pourpose.
roll it like a conical bread and bend it ,let it dry .
Many oem cars use plastic manifolds.
Espen Hilde           I am used to the invisible cone shaped hats.
When it falls over my eyes ,it fools me to belive I am seeing the truth.
Its impossible to detect when it happens.......
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> From: Tony Bryant <Tony.Bryant at psc.fp.co.nz>
> To: diy_efi at efi332.eng.ohio-state.edu
> Subject: DIY glass fibre plenum chamber? Bad idea?
> Date: 10. februar 1998 23:11
> 
> I'm looking at redesigning my plennum chamber to 
> something a little more streamlined than just a 
> box.
> 
> What I've got is a inline four cylinder with a cast 
> aluminum individual runner carb type manifold (meant for DCOE
> webers), that has been modified to take injectors. 
> 
> What I'm talking about is the continuation of these runners to
> get a decent length, then into a common plenum (as is standard
> on production efi engine).
> 
> I'm looking at making this plennum (and its short little runners)
> from fibreglass, with a metal gauze set in it to help dissapate
> any heat.
> 
> A. Is this workable, or will the heat be too much for it? (bear in
>  mind that its not directly touching the head, but bolts on the 
>  exisiting manifold).
> 
> B. Any bright ideas on how to make it? Anything better than 
>    a polystyerene mould dissolved out with solvent?
> 
> C. Will there be any thermal expansion problems if I set the throttle
>   bodies directly into it?
> 
> 
> '71 510 Daily driver
> '72 510 Race car
> '85 V12 XJ-S Garage ornament