Twin entry custom manifolds
 

hey guys, I was just wondering who makes twin entry turbo manifolds for any of the 2 rotors. Ive noticed a lot of the twin entry turbos have a rounded off square as the exhaust inlet.

Are people just welding a round tube over the hole?

Is there anywhere that sells a smooth transition pipe from round tube the correct shape to fit in the flange?

Just use a vise, propane torch and something to beat on it with. :hahaha:


It took me about 2 hours to get my 2.25" OD tubes formed to fit inside the flanges.

also cut like 90 deg triangles that you will use for bracing the tube to the flange it will make the weld less likely to crack from the stress.

you guys have pictures?

http://www.aaroncake.net/misc/rebuil...o%20Flange.jpg

http://www.aaroncake.net/misc/rebuil...o%20Flange.jpg

http://www.aaroncake.net/misc/rebuil...med%20Pipe.jpg

http://www.aaroncake.net/misc/rebuil...o%20Flange.jpg

http://www.aaroncake.net/misc/rebuil...o%20Flange.jpg

Hey Aaron, were you able to even weld between the pipes at the flange, or did you just weld the 2 pipes together?

I like tig welding, but some of these spaces are so tight, I'm thinking of getting a decent mig welder and have various gases and wires

oooOOOO I see big boy runners :) Be careful with the torch method you don't want to overheat the tubing and weaken it...

Isn't it funny how everyone assumes how easy it is to make a turbo manifold...

Looks good!

If you REALLY dont want to do that, atp turbo sells flanges with short primaries already welded in

I welded the V area between the pipes, and also welded inside the flange. It was not fun. I extended the tungsten about 3/4" out of the collet and cranked the gas flow. Ruined about 2" of tungsten because I kept touching the side of the pipe.

MIG is fine.

Bloody hell....Link? :)

ok, maybe I'm confused...

Won't a divided manifold just solve this problem? I know Aspec sells them...

What's the point of extending the runners if you already have a long runner manifold? Otherwise, if you have a HKS manifold with a basic t4 outlet, is it that big of a deal to use a divided turbo on it?

Link to the atp part as well. Thanks!

Here is another option. It remains fully divded and is relatively simple to weld. Fitup is a little tricky, but not bad. The only mismatch worth mentioning is on the outside edge. Just port the flange to match.

Just a curiosity question. I am rocking what I think might be one of the ebay turbo manifolds (just judging by the general shape and such), and where the tubes meet the flange, the pipes are just left uncrushed/modified. This leaves a HUGE lip on the inside of the tube where it meets the flange. (I would think it would cause major turbulence hitting the semi wall lip?) I assumed that it would hamper performance, but I never thought about how much. Any opinions on the matter?

Thanks
~Tweak

post a pic of it. the way you desribed it, it could cause a problem. worse case grind it down then have a welder added a bead then port/grind it again.

Off to the fab section!!

This one looks good