Exhaust manifold design

[Paul Baldwin]

Well. That was a bit of a read!

As Tom's said we have discussed a "log" style manifold, mainly for ease of fabrication and space issues as already mentioned. A tuned length manifold would be great in an ideal world but is it really worth it on an xud? I was always under the impression that tuned lengths benefit normally aspirated, high revving petrols the most anyway, when scavenging effects can be maximized to get a few extra ponies?
It's Tom's money too and it's got to be said that buying bends soon stacks up. I don't have access to the raw materials or I could make either up for peanuts with a just a grinder and a welder. Hopefully we'll have less issues next time. The welder I used is kept in an open fronted shed and hasn't been maintained at all for years. Add that to using it outside on a 50m extension lol. The cracking across the material was my fault tho I should think. The bracket had a slight flex in it, one good gusset and sorted All proves you can have a crack at this sort of thing with the absolute barest minimum of kit!
Those flanges would be a great help Darren Saying that, Tom needs some more practice with the plasma cutter :p