eznfrank
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| posted on 1/5/11 at 07:00 AM |
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Exhaust clearances through GRP?
Could anyone give me an idea of how much of a gap I need to leave around the manifold as it comes out through the bodywork? I've got a nice
neat hole but the exhaust comes within around 10mm of the edge of the GRP. I want to do the final fit of the exhaust today if I can but I'm
thinking I might need to trim back a bit further.
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LBMEFM
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| posted on 1/5/11 at 07:25 AM |
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I have a 30mm gap around mine with a stainless steel surround. On the road running with air flow it's fine but if I am in the workshop running
the engine for anytime the surround distorts slightly and the GRP gets quite hot. Therefore, I would say no 10mm is definately not enough of a gap.
Barry
[Edited on 1/5/11 by LBMEFM]
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Krismc
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| posted on 1/5/11 at 07:49 AM |
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I had 10mm all round and it got a little hot, now Ive got 10mm on bottom and 20mm around the top - works fine now.
Built, Ivaed, Drove and now Sold - 2011 MNR VORTX RT+ 2000cc Zetec on R1 Throttle boddies.
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mad-butcher
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| posted on 1/5/11 at 07:59 AM |
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Wasn't a problem really, but I left too much of a gap and it failed SVA with the dreaded sharp edge ball, some edging trim cured the problem,
the heat off the exhaust kept making it fall off after.
tony
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StevieB
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| posted on 1/5/11 at 08:18 AM |
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When I built my Indy, I cut a large rectangle out, big enough to pass the whole manifold through should it ever need to come off for any reason. I
then made up an Ali filler panel that closed the gap to 10mm around the manifold.
Looked good (IMHO), no problems with heat on the GRP and the couple of times I did remove the manifold were nice and easy.
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daniel mason
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| posted on 1/5/11 at 09:53 AM |
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exhaust wrap should help a bit too.
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