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Jan-Dirk said:
Please consider the following:
As discussed in http://www.v-rodforums.com/forums/showthread.php?t=2206
the VE Maps for the SE slip on exhaust and for the 16" double barrel are nearly the same.
It is obvious that a 2-2 exhaust system will change the flow characteristic considerably but strangely this has not been considered in the map updates.
Are you convinced that SE did test the VE for the double barrel pipes???
Can anyone please find out or comment?
Why do you think that Porsche Engineering did the R&D for the revolution engine and not SE?

I have meanwhile contacted Porsche Engineering directly in order to get a qualified opinion but to be honest I have doubts that they will revert.
The 16'' double barrel exhaust is not a true 2 into 2 seperate pipes, they have a cross over pipe that essentially makes it 2 into 1 into 2 (much like the slip on SE pipes, thus their map is similar). I believe the pressure from the other cylinder is required to make higher power numbers.

Pipes that are 2 into 2 are Sampson pipes that first came out for the V-Rod, and are a joke at the Dyno centers now.

Post what you find from Porsche I would be interested to read what an authority asserts about the V-Rod exhaust.
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