One of the most famous traffic light assassins currently in Australia is Ford's awesome 240kW BA XR6 Turbo. With generous rear-end traction and effortless torque, the big XR Turbs has no problems shooting down most green-light jockeys. It's with good reason the BA XR6T is a car that many Ford fans aspire to.

But not Brendan Mock of Jim Mock Motorsport!

Brendan's fairly unassuming looking EF XR6 gives the XR6 Turbo the one conrod salute as it blusters past with tyres smokin' and blower howlin'. There's no comparison - 400hp at the wheels and 1500kg canes the BA Turbo's 230hp at the wheels and 1800 kilos every time!

Brendan lives and breathes tough Ford 6s - just check out Promise Delivered and Unlocking Falcon Performance to see some of Brendan's handiwork. So there's no surprise that he likes nothing more than to go overboard with his own ride.

Brendan purchased this 4.0-litre EF XR6 at a damaged car auction for a song. The front-end had been stoved in and, as Brendan found out, there was some hassles when it came to colour matching. The previous owner's decision to go for a custom white pearl – without leaving record of the exact brew - meant a lot of time had to be spent paint mixing. Still, you'd never pick the front-end has been painted separately to the rest of the body – it's a great repair.

While the body damage was being tended to, Brendan was in full flight getting stuck into the mechanicals.

Air forced from the compressor makes its way through a giant front-mount bar-and-plate intercooler, which is available off-the-shelf. The plumbing to and from the ‘cooler is custom 3-inch done by Brendan – of course. Purely by chance, Brendan realised the factory Ford induction elbow was perfect to join the blower to the custom plumbing – "it works a treat and there's virtually no restriction though it," he says.

Boosted induction air arrives at the standard throttle body, though the EF dual-stage intake manifold has been "modified to suit the application." Brendan isn't too keen to give much away in this department. The rest of the engine is surprisingly stock given the amount of power on tap. "It's not necessarily the parts you use but it's how you put it together that makes it last," says Brendan.

As you would expect, the compression ratio has been dropped to a forced induction friendly 8.0-ish to one using custom pistons. Up top, the 2-valve-per-cylinder alloy head has received JMM's port and polish treatment plus one-piece JMM Race Series stainless valves together with a DEV 6 Supercharged camshaft profile. This requires the use of custom valve springs. The only other significant engine mod is the use of a high-volume oil pump.

In the current tune, Brendan's supercharged EF runs just 7 psi of boost – and don't think that's not enough! On a Dyno Dynamics chassis dyno, the car has slogged out a very impressive 397hp at the wheels and taken out the 6-cylinder class at the recent Spring Nats. And that top-end power comes with typically strong 4.0-litre torque all the way through the rev range; this makes the car ready to haul butt at all times.

Brendan makes the point that the gearbox has survived thanks to tyre slip using street tyres and a sympathetic driving style.

Underneath, the XR6's show is kept on the road thanks to super low King springs working in conjunction with JMM short-stroke Gabriel dampers. Nolothane bushes can be found throughout the nose, and Brendan tells us a noticeable handling improvement came from seam welding the repaired front-end.

The standard XR four-wheel-disc brakes bring this Falc back down to speed, but Brendan says a joint development with Cebco will change this situation. A change very much for the better if you ask us!

Oooo, there's gonna be some black eyes in the BA XR6 Turbo camp!