Step 1 done, only 41 left. Manifold Build
#1
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Just ordered parts from JGS to make my own exhaust manifold. I hope it turns out like it looks like in my head, lol. But it's taken several diffent variation already on paper... I guess once I get the weld-els and measure, the final design will reveal itself to me.
#7
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
(reposting in the right thread..)
basic design.. Simple, effective, and somewhere between a log and full 4-1 design. The runners for cyl 2/3 will go straight out. Cutting the center elbows and welding them like the picture will help direct/smooth exhaust flow, and keep the pulses from 1/2 and 3/4 seperate. The turbo flange sticks out about 5.5", and should leave room enough for a 2.5"dp. I may end up rotating the center portion about ~30* up to help clear the 'shelf' area, but preliminary measurments says it should be ok as is.
![](http://faditara.smugmug.com/photos/205172039-M.jpg)
-update-
Today I made the collector section. The weld-els are easy to weld, but it seems the flanges will need another pass, not as easy to penetrate. I didn't have my camera handy, so no pics today...
Oh, I also need a new welding helmet...
basic design.. Simple, effective, and somewhere between a log and full 4-1 design. The runners for cyl 2/3 will go straight out. Cutting the center elbows and welding them like the picture will help direct/smooth exhaust flow, and keep the pulses from 1/2 and 3/4 seperate. The turbo flange sticks out about 5.5", and should leave room enough for a 2.5"dp. I may end up rotating the center portion about ~30* up to help clear the 'shelf' area, but preliminary measurments says it should be ok as is.
![](http://faditara.smugmug.com/photos/205172039-M.jpg)
-update-
Today I made the collector section. The weld-els are easy to weld, but it seems the flanges will need another pass, not as easy to penetrate. I didn't have my camera handy, so no pics today...
Oh, I also need a new welding helmet...
#8
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
As for a welding helmet. I got an autodarkening one off ebay for like $38 shipped. It's some chinese black thing, but it works great and beats the heck out of paying $100 for miller/lincoln.
If you haven't started fabing up the manifold completely, have you seen the ETD shorty mani? It uses similar design to yours but is closer to a top mount. It looks like it would flow great without worrying about puting the turbo to close to the shelf.
#10
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Pics:
parts before
![](http://faditara.smugmug.com/photos/208689751-M.jpg)
I still need to clean it up before I write it off as done; the weld els to flange isn't all the way around ( i had dinner plans so I had to stop where I did) This is my first time with flux core, and it's different from gas sheild, that's for sure. Just takes a little to get use to:
parts before
![](http://faditara.smugmug.com/photos/208689751-M.jpg)
I still need to clean it up before I write it off as done; the weld els to flange isn't all the way around ( i had dinner plans so I had to stop where I did) This is my first time with flux core, and it's different from gas sheild, that's for sure. Just takes a little to get use to:
![](http://faditara.smugmug.com/photos/208689869-M.jpg)
#14
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
More fun today. Grinding straight pipe to fit on the compound curve of a tube, that's bent 90degrees, and rotated 45degrees is fun. Lot's of sparks. Very relaxing and lets the mind wonder about life, the universe, and everything ![](https://www.miataturbo.net/images/smilies/cool.gif)
![](http://faditara.smugmug.com/photos/214133685-M.jpg)
And then tacked into place. No making fun of my quick and dirty tack welds, it was dinner time...
After consideration, I ended up tilting the collector section about 45* That left enough room to clear the brake cylinder, valve cover, and hood.
![](https://www.miataturbo.net/images/smilies/cool.gif)
![](http://faditara.smugmug.com/photos/214133685-M.jpg)
And then tacked into place. No making fun of my quick and dirty tack welds, it was dinner time...
![Stick Out Tongue](https://www.miataturbo.net/images/smilies/tongue.gif)
![](http://faditara.smugmug.com/photos/214133844-M.jpg)