[The Automotive Enthusiast]

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Originally Posted by mkPOTO

wait did you get that it makes no power?

1) Evolve E-Tronic Rear Exhaust + Evolve X Pipe with 200CPi CAT’s, Resonators

The results clearly show there is no real measureable difference in engine power output with the valves open or closed.
The pressure tests show a small increase in back pressure but this is not enough to make any real difference in engine power output. An approximate average increase of 0.10 Bar is seen through the exhaust system.

2) Evolve E-Tronic Rear Exhaust + Factory X Pipe

The results clearly show there is no real measureable difference in engine power output with the valves open or closed.
The pressure tests show a small different in back pressure but this is not enough to make any real difference in engine power output. An approximate average increase of 0.15 Bar is seen through the exhaust system.

Additionally, you can also see an average difference in pressure drop of approximate average of 0.5 Bar before the secondary CAT’s by deleting the primary CAT’s. This is why the power increase is so vast from a primary decat. Not just because of such a larger pressure drop but one that is so close to the engine.

The main result is that we do not lose power with our valve exhaust on the quiet setting. To lose power the back pressure increase towards the rear end of the car needs to be very large.

3) The dyno results show that our full system performs to the same level as any other X-Pipe/CAT/Rear Exhaust Setups with both valves open or closed.