Exhaust Manifold Information

[ThatGUY]

Lots of questions so bare with me ...

I know that the RS2 EM is better than the S2 EM.

What are the benefits of a tube header/ manifold? Is it better flow? Quicker spool up?

If so what is the best internal diameter of the tubes, same as the exhaust ports on the head?

And would an equal length be the best way to go?

Would a tube EM made the exact same size as the RS2 unit have better flow. It would cut down weight and it would be less apt to crack like the cast iron.

I plan on making a SS tube manifold and need some input.

Andrew

[ThatGUY]

I know somebody knows something.

[audiman]

Dude, a SS manifold will crack like hell, if not made from the right SS (321 is the best). Also the design is important for flow. Tubes need to be about the same size as the ports in the head. It depends on how far you are taking an engine. Doug has proved that the RS2 manifold is capable of doing 440bhp, yes it does crack, but not so it blows. My tubular manifold is made from SS, but lower grade, i have welded it up 3 times now.

[ThatGUY]

OK thanx.
I was wondering if it would be worth making a copy of the RS2 one from SS.

[AudiS4]

I have seen a copy of an RS2 design manifold, but made with ss tubes. Seems to work OK. Good thing is that you can keep original water and oil supply, and exhaust as well.

J

[BRY]

I have seen a copy of an RS2 design manifold, but made with ss tubes. Seems to work OK. Good thing is that you can keep original water and oil supply, and exhaust as well.

J

J
Where from?
I want one

[ThatGUY]

@AudiS4.. That's what I was thinking. It would also reduce a little weight. I know not a lot but every bit counts.