Triggerhappy
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| posted on 6/1/10 at 11:47 AM |
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Downpipes in 20AWG ?
Hi, im about to order J-Bends to build some equal length downpipes...will 20AWG 1,5" 304SS hold? or is 18AWG the only way?
Im pretty weight countious as it´s an L-hand drive.
Im from Sweden, so im escused...The Muppet drummer for president!!
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minitici
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| posted on 7/1/10 at 11:19 AM |
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I think tubing is normally expressed in SWG?
Anyway
20SWG is 0.914mm
18SWG is 1.219mm
16SWG is 1.626mm
A lot of the SS bends and pipe now seem to be metric 1.5mm wall which is fairly heavy.
With 20SWG you will need a good fit-up and tig weld.
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Triggerhappy
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| posted on 7/1/10 at 12:43 PM |
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My plan is to TIG weld with solar flux to keep "inside" nice and tidy.
When fitment is done i will weld braces between pimarys to distribute any load from "driving".
All to keep weight down!
Im from Sweden, so im escused...The Muppet drummer for president!!
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minitici
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| posted on 8/1/10 at 09:52 AM |
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Hi - I had not heard of 'Solar Flux' so I had a quick search.
Looks like a good way to tig stainless without the need to purge the inside with argon.
I will need to try some - thanks for the tip.
Doug.
But it is not cheap! £60 +vat for a tin......
[Edited on 8/1/10 by minitici]
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Triggerhappy
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| posted on 8/1/10 at 10:39 AM |
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quote:
Originally posted by minitici
But it is not cheap! £60 +vat for a tin......
[Edited on 8/1/10 by minitici]
46USD...ordered 1 can together with my 20swg J-Bends  and tripple Y collector!
Tip for really well stocked thin wall SS tubes:
http://www.spdexhaust.com/
Im from Sweden, so im escused...The Muppet drummer for president!!
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SPYDER
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| posted on 8/1/10 at 04:34 PM |
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If you are really weight concious then you could do what we did and use titanium tube.
We made a full titanium system for our Phoenix by cutting up two sets of 929 Fireblade headers which are titanium as standard.
They were cut up into straight bits and bends then it was reasonably straightforward to "mix and match" to achieve the result.
The collector was the hardest part to make as the material we had at hand was slightly thicker we would have liked. We could bend it but it just
sprang back!
The silencer is a standard ZX9 unit.
Yes, we know the primaries aren't equal length. And we don't care. Hasn't seemed to make a difference.
The system probably weighs less than half that of a stainless one. And it's quiet. And only cost £120 to make. Plus a lot of time and sweat.
Eldon, the welder, says it is easy enough to TIG.
Blade diameter headers could be a little restrictive on your Busa though. Were any Busa exhausts made from Ti? Or maybe ZX12 or similar?
Geoff & Eldon.
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Triggerhappy
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| posted on 8/1/10 at 04:54 PM |
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The original Busa header is definatley not Ti....
I was actually looking at an used Yoshimura Ti system but when i puzzled with the bends it would not have enough "parts" to go
together...purchasing two systems would have been bankrupsy
When i get really rich i take the car down to Akrapovic and stay for an day or two *Dreaming*
Anyway...your system looks nice but im not keen on the lenght difference between the primarys...
Im from Sweden, so im escused...The Muppet drummer for president!!
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