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Do I need a flex section on this wastegate branch?

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Do I need a flex section on this wastegate branch?

 
Old 07-01-2008, 06:50 PM
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Default Do I need a flex section on this wastegate branch?

Hey there, I just fabed up my wastegate branch on my downtube. Do I need a flex section? It's pretty easy to stick it in there.

PS: pay no attention to my crap *** TIG welding
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Old 07-01-2008, 06:51 PM
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wouldn't hurt considering the little tube will expand at different rates.
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Old 07-01-2008, 09:19 PM
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Old 07-01-2008, 09:46 PM
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shoulda just run a open dump... ha

looks very nice tho, good job. Only thing Id change is make the dump tube go into the exhaust at a less angle.
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Old 07-01-2008, 09:56 PM
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Yes, flex is urgent. Adequate flex can be had from a swage of one tube up over the other. If you use a swage, consider that the larger open end of the swage ought to point away from the wastegate.
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Old 07-02-2008, 03:33 PM
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Originally Posted by Corky Bell View Post
Yes, flex is urgent. Adequate flex can be had from a swage of one tube up over the other. If you use a swage, consider that the larger open end of the swage ought to point away from the wastegate.
I looked for an SS swage at 1.5", couldn't find them anywhere (summit etc.), is there an advantage with a swage vs flex section? I think I can fit an SS flex section in there.
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Old 07-03-2008, 01:02 AM
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I want welding Skillz!
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Old 07-03-2008, 01:05 AM
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My mission tomorrow is to work the word "swage" into at least 5 conversations.
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Old 07-03-2008, 02:13 PM
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Lol, I unbolted the downpipe and it sprung a bit; I guess I don't have a choice here, I'm putting in a flex section.
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Old 07-03-2008, 03:22 PM
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yea, all else aside those welds look pretty good, I wouldnt worry about it.

Nice
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Old 07-03-2008, 03:31 PM
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you should try to make the merge a little more gradual, but otherwise it looks fine. i've never used a flex on wg re-circ setups and haven't had one come back for a repair yet.



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Old 07-03-2008, 03:32 PM
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Flex fo'sho!!!

Is that a WB bung directly across from where the dump feeds into to the DP?
If so I'd revise that as well.
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Old 07-03-2008, 04:17 PM
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Originally Posted by Zabac View Post
Flex fo'sho!!!

Is that a WB bung directly across from where the dump feeds into to the DP?
If so I'd revise that as well.
Is that a bad thing??? That's the stock one, I haven't welded in the wideband one yet...
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Old 07-04-2008, 11:55 AM
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Weir is becoming my hero. Except those socketheadcapscrews...have any issues with the allen area stripping out after the bolts have been in use for a few years? I'd like to find 12 point bolts & nuts in metric.

In response to the OP, a flex section can't hurt. If the DP sprung and you can't get it back, then you don't have much of a choice. If you can get it back together, normally after a few heat cycles it won't spring anymore.
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