Turbo Manifold

[A20A1]

Here is my attempt at a manifold.

It uses


( x9 ) 1-1/2" , 45 DEGREE ELBOWS
( x1 ) 1-1/2" , 12" PIPE

One of the 45* elbows is cut in half, the two sections are then used on cylinder 2&3 to angle the pipes up and connected to that are two straight pieces from the 12" pipe, cut into ( x2 ) 1" sections. After the 1" pipe I connect the 45* elbows and rotate them (__________) degrees, so they point in and down.





I wasn't sure about the turbo flange dimensions so I left it out. From where the manifold sits now it should be easy to cut some metal to fill up the gaps and add the turbo flange.


all measurements are taken from mcmastercarr's website using their 3D files you can download except the flange which was made by me.

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I now need a 3D engine bay and turbo and turbo flange and I can mess around with fitments.

I will extract the angles to rotate each 45* pipe later.

are you guys using smaller radius bends for your 90* elbows? where do you buy your elbows from?
do you think my angle points the turbo too far out? I don't mind offsetting a civic radiator and building a shroud on the front to duct air to it.




Alright got a new link thanks to SQ
http://www.acestainless.com/index.ph...od&productId=6
very short 90* bends... may be too short but it's nice to have as an option.

[mkymonkey]

i hate you...just because you can do that.

lol looks good though

[Accordtheory]

It doesn't count as an attempt in my book until it's all welded up..lol. It would probably take me longer to learn how to use the program than it would to just build the manifold. And there are design aspects of building a manifold that can affect those dimensions depending on your equipment, etc. For instance, how are you going to clamp and cut those bends?
I would say the angle of the turbo flange should be much closer to perpendicular to the head flange. And as far as the tight radius bends, they are used in certain manifold's like lovefab's mini me eq, but by almost no one else, price is about 3.5x as much, and they are more restrictive to airflow.
So are you actually going to build a manifold?

[A20A1]

It doesn't count as an attempt in my book until it's all welded up..lol. It would probably take me longer to learn how to use the program than it would to just build the manifold. And there are design aspects of building a manifold that can affect those dimensions depending on your equipment, etc. For instance, how are you going to clamp and cut those bends?

I usually cut with a hack saw allowing some room for error and then hand file the parts with a large crosscut flat file. it takes a lot of time and effort but thats all I have at the moment.
I wont weld it together but I can tac it and let someone else weld it.

I would say the angle of the turbo flange should be much closer to perpendicular to the head flange. And as far as the tight radius bends, they are used in certain manifold's like lovefab's mini me eq, but by almost no one else, price is about 3.5x as much, and they are more restrictive to airflow.
So are you actually going to build a manifold?

Thanks I'll keep thatin mind.
So is having the turbo stick out more towards the bumper going to cause problems? I was trying to lift it above the crossmember... is it more work for the downpipe? or too close to the IC, I guess I can point it down more but then I will want to raise the height of the flange even more.

either I use my flange for a turbo manifold or header and I'm still torn between the two.

Okay I'm going to try and document the angles for the elbows.



Starting from head flange

First Segment

Cylinder 1 & 4 are rotated 45* inwards. Their 0* is the open end of the elbow facing up.

Cylinder 2 & 3 are left facing up at Their 0*


Second Segment

Cylinder 1 & 4 are rotated 60* down. Their 0* is relative to the previous segment 1.

Cylinder 2 & 3 are considered extensions from segment 1


Third Segment

Cylinder 1 & 4 are rotated 45* down. Their 0* is relative to the previous segment 2.

Cylinder 2 & 3 ...



to make degree markings on the actual pipe for orientation I'll use a piece of string, tape and a sharpie. The string will be marked in 15* increments and I'll transfer those markings onto the pipe.
to find the 0* / 180* mark on each pipe before beginning to map out every 15*, I'll lay the elbow on a table and then using angled rulers and other straight edges mark the apex of the curve +/-90* on either side of the pipe.

[Accordtheory]

For fuck's sake, just build it!

[A20A1]

I want to

anyways I just bought a new turbo book.

Motorbooks Workshop
Turbocharging Performance Handbook
Jeff Hartman

I skimmed through it and I think it's worth the money, it's a little more up to date I think than the book by Bell.

It has a nice section for turbo math... I know the info is available online but I like having it in book form.