B6d exhaust manifolds

[ZephTheChef]

I suspect we could tee it with a restrictor, right?

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That's probably all the flowmeter is...adjustable orifice. We could put a needle valve on a tee'd line.

[bhearts]

That's probably all the flowmeter is...adjustable orifice. We could put a needle valve on a tee'd line.

Bingo

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[bhearts]

still have to cut home for turbo flange before I weld it. First manifold almost fully done.

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[Meepersly]

Looks awesome

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[bhearts]

Looks awesome

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Thanks. I've never welded on stainless before, but the welds look similar to welds I've seen online. Maybe next time I'll try out my pulse setting and make the pretty welds.

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[Advancedynamix]

Those look cool I have a megan racing top mount converted to down mount and t3. I was gunna cut the head flange off and make a long tube for the b6d.
Are there any cheap headers out there with similar port spacig?

There is a ram horn on ebay for the b6d, but the flange doesn't fit without fudging the holes a bit.

[bhearts]

inside needs a little porting then ready to go.

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[bhearts]

Ported. Turned out great.

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[Meepersly]

Nice

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[Advancedynamix]

How much did the head flange warp?

[Sid_RallyX_82]

Would it be a bad idea to weld it with the flange bolted to the head? Would that warp the head?

[bhearts]

Would it be a bad idea to weld it with the flange bolted to the head? Would that warp the head?

The head regularly sees those kinds of temps, I think it would be fine

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[bhearts]

Well, the coolant keeps the head cool, but the exhaust ports are very toasty

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[Advancedynamix]

That is a good way to limit the amount of warpage, but it can be difficult to weld around the exhaust studs.
It's best to make a weld fixture and have it cnc ground with a slight arc on the flange mounting surface, to preload the flange. The fixture should also be drilled with passages for purging the manifold while welding. If it uses fasteners with a low profile head, it'll be easer to weld around the mounting holes. Some of these fixtures are water cooled to control pre and post heat.