# Friend Just Finished Making Ecotec Header...

**URL:** https://forums.speedlife.net/t/friend-just-finished-making-ecotec-header/248406
**Category:** Shift518 Automotive
**Created:** [November 16, 2009, 2:00pm UTC](https://forums.speedlife.net/t/friend-just-finished-making-ecotec-header/248406 "2009-11-16T14:00:36Z")
**Posts on this page:** 1
**Showing post:** 9

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### Author: ![KrazyKid](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/krazykid/32/6371_2.png) [@KrazyKid](https://forums.speedlife.net/u/KrazyKid)
#### Post date: [November 17, 2009, 8:23am UTC](https://forums.speedlife.net/t/friend-just-finished-making-ecotec-header/248406/9 "2009-11-17T08:23:18Z")

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> [@New Show on SpeedTV: Forza Motorsports Showdown](https://forums.speedlife.net/t/new-show-on-speedtv-forza-motorsports-showdown/21718/29):
>
> Just pointing it out for you that’s all. You can see the oxide “sugaring” on the inside welds, especially in the collector.

Nice work BTW OP.

You know I am new to the tig process and I love it BTW. But I havent taken the time to look into back purging yet. From what you just said, I assume it is shielding gas pumped inside the work, to keep the penetration inside the projects welds from contaminating? I noticed that when I was welding up my charge pipes for the jetta and the wastegate/exhaust work I did too. The welds outside were butter, but the inside was all dumpy looking.

please enlighten me, not to steal the thread.

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