I used schedule 10 304L SS. If you already have the steel flanges I'd use regular sch 40 pipe with weld el's from mcmaster.com They are cheep and will outlast your car.

This is it, don't run your WG runners as early out of the manifold as i did. Right now I'm having boost creep issues even using a 46mm wg. I think it's because I tapped in too early to the main runners.



https://www.nopistons.com/forums/upl...1049682377.jpg

Here you can see the WG runners a little better.



Becides the creep issue the manifold is working awsome. Great boost responce, I think the equal length and divided manifold/turbo is really the only way to go.



https://www.nopistons.com/forums/upl...1049682015.jpg

That is a pretty manifold. Did you weld that yourself?

I did it all except machine out the SS flanges. I like having a machinist for a friend https://www.nopistons.com/forums/pub...IR#>/smile.png

That kicks ass man. You did a very nice job, I wish my welds were that even.





How many times did you go over that?

Thanks

What do you man "go over"? I layed 1 bead per weld, no more. Actually I used the fusion method for most of the manifold. Only used a little filler rod here and there when needed. Thats the beauty of SS, it fusion welds awsome. I can't weld mild steel very well and forget about aluminum...

Ahhhh so thick ss welds just like really thin ss. You just tack it in a couple spots, and melt the joint togather.







What I meant by go over is stitch welding basically. You make your filler pass, then you go back over it with the machine turned down. You can make circles, or x's. Yours looked like you did the x pattern.







Mild steel is easy, you have the skills to do it. Just practice at it a bit.





Aluminum is mostly based on machine settings. If you can't get the machine right, the welds will never be right.





All it takes is knowlege and practice.

I tacked the two main runners together then welded them with one pass per joint. Then I fitted the two main runners into the flanges and welded them. I did the WG plumbing last.



I was just borrowing my friends TIG welder and really had no idea how to TIG at the time. I practiced on some scrap and them felt confident enough to go ahead and do the job.



At first I was trying to purge the runners with gas but soon found out that wasn't needed because of the thick wall of the sch 10 pipe (~1/8"). I was told to purge but I think that may be more importiant when welding thin tubing ss.



I understand what you are saying with the practice comment. Learning to weld with the TIG takes a lot of it unlike MIG.

It sounds like you did everything right. I'll have to try making one with ss. I haven't done that yet.







Mig = metal hot glue gun. I only use our mig to tack intercooler tubing togather. Nothing else. I hate mig.







Purging the stuff that you are welding... That brings up a whole giant argument. I do not purge anything. It is a waste of gas.





Go talk to some people that have been welding for 20 years. Ask them what they think about it.