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Home > Technical Chat > Help with DIY Turbo Manifold - 304 vs 321, TIG vs MIG, Reliability, Operating Temperature and Boost levels

Jimster
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9404 Posts
Member #: 58
455bhp per ton
12 sec 1/4 mile road legal mini

Sunny Bridgend, South Wales

12th Nov, 2013 at 04:16:30pm

I tigged my manifold, and then added an external wastegate, this was mig welded and after time and medium - high boost it started to crack, almost every time I used the manifold a new crack appeared. I've just made a new manifold a horrid job I don't want todo again, so I purged it and tigged it. It will not win any prices for being pretty, but does the job, the welds in side are as smooth as the ones on the outside.

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On 15th May, 2009 TurboDave said:
I think the welsh one has it right!


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of turbo twinkie in a car and first to
run a 1/4 in one!!

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Turbo This..

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1767 Posts
Member #: 9165
Previously josh4444

Australia, brisbane

13th Nov, 2013 at 08:19:54am

this is an example of what i did but mine was made useing 15 or something degree bends it turned out to be a nice shape inside all blended in and what not

edit this is more like what i did but with three pipes of course http://www.youtube.com/watch?v=J7oC44v4fy8

http://www.youtube.com/watch?v=xewA7QHWp1c

if you do it free hand (like i did) it takes some back and forth to the linishing belt sander to get it tight without gaps..

Edited by Turbo This.. on 13th Nov, 2013.

Home > Technical Chat > Help with DIY Turbo Manifold - 304 vs 321, TIG vs MIG, Reliability, Operating Temperature and Boost levels
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