Afterburner Rolling Road Testing.

To prove the power of the Afterburner Vortex, we paid a visit to Engine Advantaged Ltd in Essex, and spent an afternoon on their rolling road, testing not only our new Afterburner Vortex, but also the original Afterburner and an Afterburner Vortex without the spiralled baffled section. We set out to prove the real performance gains from minimising bends in the Afterburner Vortex's pipework and also the spiralled baffled section itself. We used our own WRX03 for the Rolling Road sessions.

Thanks to Ian Reeve at Hayward and Scott and to the team at Engine Advantages (tel 01376 502 522) for their help and use of the facilities.

The blue lines equates to BHP (Flywheel) the top red line Torque and bottom red line BHP (at the wheels). Afterburner Vortex shown as a dotted line.

1. Testing the benefits of the spiralled baffled
Afterburner without vortex baffle Vs Afterburner Vortex with vortex baffle
The power graph below shows the difference the spiralled baffle section (Vortex) makes, as both exhausts were identical apart from this. At 5k revs the Afterburner Vortex continues at a high rate of climb on the BHP scale (dotted blue line) whereas the identical exhaust without the spiralled baffle starts to lose its rate of BHP climb (solid blue line)

Afterburner Vortex = dotted line

Afterburner without Vortex = straight line

2. Testing the benefits of an angled exit
Afterburner straight exit Vs Afterburner angled exit
The following graph demonstrates the benefits of minimising pipework bends leading up to the rear silencer. Please note that the dotted blue line shows the standard Afterburner's BHP which becomes inconsistent at 4.5k RPM whereas the Afterburner with an angled exit continues to climb at a consistent rate. Neither exhaust had the spiralled baffle (Vortex) for this test, so the only difference between the two silencers was the pipework leading the the silencer itself.

Angled exit = solid line

Straight exit = dotted line