Dual exhaust on ej22?

[300td4x4]

Has anyone tried dual exhaust on a ej22 or any other subaru flat four for that matter? I would think this would improve performance. Obviously running the two exhaust pipes out the back would present issues.

[75skunkaroo]

i ran "dual" on my ea-71 for a few days. it was never a complete set up though, just 2" flex pipe that ended at the front of the front doors. it sounded like some old redneck farm truck without exhaust.

i was thinkin about puttin lake pipes on my car lately...

 

-mike

[Skip]

This is the wrong forum for EJ22 questions

But I run a dual setup on one of my Brats

 

The ticket is to put an "X" pipe in

I believe

this allows the scavaging effect to be maintained.

 

I gained power from down low to about 6k

I run Weber DGEV 32/36 on this engine

 

This is what my setup looks like

[MilesFox]

refer to this post, there is an example of a dual exhaust there as well, demonstrating an x-over as skip mentions, and some exhaust theory

http://www.ultimatesubaru.org/forum/showthread.php?t=30262&highlight=dual+exhaust

[300td4x4]

So 2 pipes all the way out the back would be bad? How about an H pipe instead of an X pipe?

[MilesFox]

yeah that would work too, whichever would be easiest to fabricate, as long as you keep the theory in mind with your design

[archemitis]

true duals dont seem to work well at all. i tried all kinds of dual exhaust, as well as morganm. baffles, no baffles, cherry bombs, it seems like if its not x or h piped over it will run like crap, and sound like an airplane.

 

but if you want it just to sound cool, those things sound like v8s with a hole just behind the first cat =] low deep rumble.