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Location:
Adelaide
Registered:
May 2003
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Location:
Lost in the K hole
Registered:
May 2002
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Re: Strength of TIG Welds
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Sun, 13 June 2004 02:17
 
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perfectly fine
inserting the tube into the plate before welding is almost over-engineering, but, hey, at least youll know itl never break
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Registered:
June 2004
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Re: Strength of TIG Welds
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Sun, 13 June 2004 02:35
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Just make sure the Aluminum grade is right. 2011-T3 should be the minimum grade.
How long would the overhang be? The last set of quads (AE101 stock) I had for the 16V were mounted to a steel adaptor, mounting plates were 10mm on both ends and the pipe's 40mm OD, 80mm in length. Over engineering by 30% shouldnt hurt.
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: Strength of TIG Welds
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Sun, 13 June 2004 06:25
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Of course, you could always make a bracket to brace the manifold/quads.
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I supported Toymods
Location:
melbourne.victoria.austra...
Registered:
June 2002
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Re: Strength of TIG Welds
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Sun, 13 June 2004 08:25
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chris TIG is one of the strongest welds available (when done properly with correct penetration)
like dave says though - rig up a brace down to the block like how the 86 and 100kw motors do....because when you're working on your engine there is a good chance you'll lean on em for whatever reason (i know i sometimes do lean on my inlet manifold - and yeah i had to re-fabricate my brace as my LPG convertor sits underneathe my inlet manifold)
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Location:
On your mum!
Registered:
May 2002
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Re: Strength of TIG Welds
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Sun, 13 June 2004 10:53
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Leaning on the manifold is not likely to cause problems, vibrations and bumps have the ability to work at the aluminium over time, this is more likely to occur at a weld due to the altering of the material's grain structure. I would use 3mm thick as a minimum - as for overkill, insert the tubes and brace it as well.
When welding alloy - I like to use no less that 5000 series or 6000 series (the extruded tube will be in this range anyway, I also use extruded flat bar for the flange plate), the temper will not matter as much because it will anneal at the weld anyway (alloys in this range are generally T5 or T6).
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Location:
Adelaide
Registered:
May 2003
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Re: Strength of TIG Welds
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Sun, 13 June 2004 12:11
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I may have access to some T6 extruded tube to make up this manifold with. Looking at 60mm runner length with 12mm T6 bar/plate on the quads end and the 12mm of stock alloy manifold plate on the other end.
Anyone know what grade the stock manifold is?
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Location:
On your mum!
Registered:
May 2002
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Re: Strength of TIG Welds
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Tue, 15 June 2004 01:20
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I am not sure of the grade of the stock manifold, but you will need to use 4043 (or similar) rods to weld to it. When joining the extruded sections I use 5356 grade rods.
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