Back Pressure

[PMK]

The resonator adds some slight back pressure just enough for the bottom end....a good bottom end kick.. but not too much..to effect your top end, which would be a restriction, which is bad...this is why I DON'T run any baffles..it hurts your top end performance ..the la monster is too free flowing, no back pressure..which hurts the bottom end performance...the resonator reduce the loud harsh sound....it's richer and deeper....also... Both pipes were compared with the flashed ECU...at the 1/8th dragstrip..so I know the extremes of both pipes...the RLS is better.

If the resonated bypass pipe uses a simple hole style perforated tube, backpressure through the tube is the same. If the resonated bypass pipe uses dimpled whistle slot style holes, then technically it is a baffled design.

Your test data of the dragstrip is typical of seeing dyno runs where the operator would swap a component without resetting the baseline in the computer. If you attended the dragway, and disconnected the battery prior to any runs, allowing the computer to clear, the disconnected again during the parts swap, at least the baseline settings would be consistent. Not saying optimized, merely the same baseline.

Since you did make 1/8 mile passes, are you willing to share the timeslips, and how many gearshifts were made during each run?