Fabrication Everything From JBwelded/Fluxcored downpipes to Equal length SS Manifolds.

First Noob post advice on header build

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Old 04-28-2009, 12:14 PM
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So has anyone personally used any of these pre-formed jobbies? Do you folks think I can just glob some weld in between the pipes? Also, when final welding is there a particular end I should start from or anything? Pre heat? Like I said I'm a noob at this. Thanks!
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Old 04-28-2009, 12:59 PM
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I`ve ordered many times from columbia river mandrel bending - they are awesome
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Old 04-28-2009, 02:46 PM
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looks decent
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Old 04-29-2009, 11:44 PM
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Looks nice, how did you figure what cylinders to pair up on the first set of Y's
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Old 04-30-2009, 06:19 AM
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Originally Posted by Turbo10
Looks nice, how did you figure what cylinders to pair up on the first set of Y's
Mainly copied other commercially available headers but the firing order is 1-3-4-2
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Old 04-30-2009, 10:29 AM
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You could do a weld over the places that have gaps and will leak air, as long as it is a good weld and covers it up you should have no problems.
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Old 04-30-2009, 09:09 PM
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From what I have seen...

You weld the tubes together on the ends and then slip the coupler over the tubing and weld it onto the outsides of the tubing.

Something like this: Picture
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Old 05-02-2009, 03:21 AM
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Good job. I like it.
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Old 05-04-2009, 03:48 PM
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hammer
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Old 05-09-2009, 10:50 AM
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I spent quite awhile mulling over the collector welding issue. I tried adding filler in the crack but it was a big ugly mess.


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I ended up just welding the ends of the pipe up and adding material to fill the gaps then sliding the collector on and welding it up as suggested above. It seemed to work. I'm going to take it to work and smoke test it for leaks later this week.


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Some welds turned out better than others. It's got some obvious issues but I learned a lot and hopefully it will hold up OK.


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Fillet welds are easy to make look good. But are they strong?

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The collectors were where I had the biggest issues. I was never able to get a nice tight gapless joint "" all the way around. As a result I had consistency and undercut issues.

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This one turned out like absolute garbage. I think I got it too hot or something? Sadly it will be one of the most visible welds once it's in the car.


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Anyhoo here's the finished product


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Installed

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Tucks up there nice and tight with plenty of ground clearance.

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So I can get low.

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Welding experts please give me some feedback.
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