Dual exhaust from downpipes anyone?

[Eagleton]

Has anyone done dual exhausts all the way back from the downpipes?

Did some searching, but all I can find is a few guys who splitted the pipes at the end.

[TAR]

I dont think anyone has because there is only 1 lambda sensor for both banks of cylinders. If you split the exhaust from the manifold, you would need 2 lambda sensors.

I am sure someone will come along soon and explain properly.:happy:

[Nutter_John]

Yep correct Tar , but this will only be needed when in closed loop mode , if you have a piggy back ecu like the MAP2 you can get that to output a value based from it's tables

[Eagleton]

I see what you meen, Im going to run a Haltech stand-alone ECU with TD04´s and some other stuff. Havent really looked underneath the car properly, but it would be cool to have two pipes running under the car.

[Turbo_Steve]

Nice idea, but not a whole lot of room to do it.
Also, I'd suggest it's not the optimal setup for a turbo-charged car anyway: All the "performance" exhausts for turbo-per-bank cars seem to incorporate some kind of balance pipe, which implies there are performance benefits to co-joining them somewhere (most likely pulse timing, as the tend to join towards the back of the car).

For the amount of effort, I don't think it's worth it.

[stuey]

Many of the newer retro-fit peformance exhausts for the old yank V8 muscle cars have a crossover, or X pipe for balance between the two 2 dual systems.

[bradc]

I'm keen on going with a full twin system, but it might be hard to fit it under the car.

[jerryd_33]

What if the front bank was fitted with a slightly smaller diameter piping as to the rear?
might equalise on the exhaust back pressure.

[bradc]

thats just trying to make something simple into a very complicated process!