spdpug98
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| posted on 5/2/09 at 10:23 AM |
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Hole for exhaust manifold
I am just about to cut the hole in my side panel for the exhaust pipes, is there a set dimension that the pipes should be away from the body
My mock up looks like this:
My Blog: http://spdpug98.wordpress.com/
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dogwood
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| posted on 5/2/09 at 10:25 AM |
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Alloy or fibreglass?
Cardboard you'll need a LOT more space..
FREE THE ROADSTER ONE…!!
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BenB
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| posted on 5/2/09 at 10:25 AM |
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Depends on what the side of your car is made from. GRP doesn't like getting hot. Obviously an ali side panel won't care so much and
won't need such a big gap. If it's ali though you'll need to do something re the sharp edges for SVA/IVA and obviously if you use
rubber trim it won't like the heat unless you allow space for it....... I have individual holes for each tube but I think I allowed only about
5mm gap.......
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spdpug98
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| posted on 5/2/09 at 10:29 AM |
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quote:
Originally posted by dogwood
Alloy or fibreglass?
Cardboard you'll need a LOT more space..
Cardboard you'll need a LOT more
Sorry should of said the body is GRP
My Blog: http://spdpug98.wordpress.com/
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dogwood
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| posted on 5/2/09 at 10:37 AM |
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Sorry can't help realy
As Ben says aloy not a problem
Mine is about 10mm gap
David
FREE THE ROADSTER ONE…!!
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pewe
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| posted on 5/2/09 at 10:44 AM |
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IMO curves look much better than square corners in that area. Also bear in mind the panel needs turning back on itself or a trim added for minimum
radius for SVA/IVA.
Cheers, Pewe 
PS Wicket you were lucky - my guy took the view that anything that was accessible whilst working on the car/servicing it needed to have a radiused,
i.e. not raw edge. He was right - practically slashed an artery whilst delving into the pedal box recently.
[Edited on 5/2/09 by pewe]
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wicket
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| posted on 5/2/09 at 10:53 AM |
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May not need trimming, depends whether the test sphere touches the edges. Mine passed OK with out any edging
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Mr Whippy
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| posted on 5/2/09 at 11:19 AM |
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Definitely looks nicer as a curved and trimmed hole, if its GRP then sharp corners will only crack the gel coat in a very short time
like this looks great -
[Edited on 5/2/09 by Mr Whippy]
Fame is when your old car is plastered all over the internet
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Daddylonglegs
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| posted on 5/2/09 at 11:37 AM |
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quote:
Originally posted by wicket
May not need trimming, depends whether the test sphere touches the edges. Mine passed OK with out any edging
Must admit though, it looks much more professional finished like that shown
It looks like the Midget is winning at the moment......
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John.Taylor
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| posted on 5/2/09 at 12:27 PM |
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I've used exhaust wrap then left about 5mm gap to the GRP. As I'm still building it the exhaust hasn't had a chance to get hot so I
don't know if there is enough gap? Any comments (Pinto 2.0efi)?
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bassett
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| posted on 5/2/09 at 12:39 PM |
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Id go for 1-2cms around the exhaust for clearnance. How are you going to fit your exhaust? I found mine with the MNR collector impossible to fit
headers then the collector so i fitted the headers to the collector then fitted it all through the hole as one piece so i made my hole big enough to
slid it in one side at a time - have a look at my blog below for pics.
Adam
My MNR Blog Updated Jan 2010 - Track Day Prep Begins!
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