scootz
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| posted on 27/8/13 at 11:13 PM |
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DIY Exhaust Manifolds
Is there a tried and tested way to form round tube to match the oval exhaust port shape found on most modern engines?
It's Evolution Baby!
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loggyboy
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| posted on 27/8/13 at 11:16 PM |
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There's some good advice on this in one of these 6 vids, but its well worth watching all of them.
https://www.youtube.com/watch?v=j9knDsi-td8
Mistral Motorsport
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scootz
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| posted on 27/8/13 at 11:16 PM |
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Cheers... will have a gander!
It's Evolution Baby!
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v8kid
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| posted on 28/8/13 at 10:36 AM |
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When I made manifolds for square ports I tacked the exhaust tube in place in one position on the manifold flange then shaped it by hand to match the
rest of the contour. When I had a section of the port that matched well I then tacked it again and so worked my way round the rest.
You have to do some sums first to make sure the circumferences are the same. My pipe was slightly larger than this calc requires and I ground the
inside to blend them.
When all the manifild was tacked I welded the seams.
Cheers!
You'd be surprised how quickly the sales people at B&Q try and assist you after ignoring you for the past 15 minutes when you try and start a
chainsaw
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deezee
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| posted on 28/8/13 at 10:46 AM |
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I just used a vice on my stainless steel manifold and it worked VERY well. I was expecting it to pop a flat on or go wrong.
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loggyboy
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| posted on 28/8/13 at 11:13 AM |
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This is the part that gives some good ways of doing it.
https://www.youtube.com/watch?v=F-2SX7bUIlY&feature=player_detailpage#t=231
[Edited on 28-8-13 by loggyboy]
Mistral Motorsport
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T66
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| posted on 28/8/13 at 12:09 PM |
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http://www.abperformance.co.uk/products.aspx?cat=19
Oval to round adaptors - a Woody job 
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scootz
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| posted on 28/8/13 at 12:35 PM |
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Cheers fella's.. much to think about there!
It's Evolution Baby!
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PhillipM
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| posted on 29/8/13 at 03:34 PM |
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As per someone above, I just squeeze it in a press and then fettle the inside slightly with a die grinder to get it spot on - I'm in there
dressing the welds anyway so not really much extra work.
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