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RGB Mustang conversion: New 945kW challenger for SA drag strips

  • RGB conversion takes Mustang to full gallop
  • 945kW/1100Nm from Ford conversion
  • All supported by full drivetrain changes

JOHANNESBURG, Gauteng – What better way to celebrate International Mustang Day (it was April 17) than collecting your 945kW/1100Nm Ford Mustang from tuning house RGMotorsport?

That’s what one lucky customer got to do… the supercharged, 5.4-litre, V8 under his car’s bonnet has made the car one of the most powerful street-legal vehicles yet built by RGM.

But there’s more to come… the numbers gleaned from the RGM dyno were achieved with a 7500rpm limit imposed until the engine is fully bedded-in. That’s when 8200rpm will be at the driver’s disposal.

Phase 2 will add nitrous oxide injection.


Rob Green’s team said the brief from the car’s owner was at first straightforward: ”Build me a street-legal car that can get into the nine-second bracket over a quarter-mile and be driven home later.”

The RGMotorsport team applied their usual enthusiasm and tapped-in to a global network to ensure his wishes were met. Here’s what was recommended…

READ MORE Mustang features on Carman’s Corner

Starting from the bottom, in went a Boundary Racing oil pump, stroker crankshaft with an ATI damper pulley, Eagle conrods, Cometic head gaskets, PAC valve springs, Ferrea valves, and Comp Cams camshafts.

ARP fasteners have been used throughout.


Perched above it all is a Whipple blower with a Stage 3 competition Kit driven from the crank by a heavy-duty, 10-ribbed, belt. The blower is rated at 2,9 litres (which means for each revolution it can cram just under 3000cc into the engine), forcing compressed air through an intercooler.

Maximum boost is currently 1.25 Bar which. along with a static compression ratio of 9.8:1, means eight rather large explosions for every two crankshaft revolutions.

The stock engine management system was overwritten by a Lund Racing map created specifically for this car and optimised by RGM. There are two maps: one for normal pumped fuel, the second for the drag strip. Then the tank is drained via a quick release system and a 95% ethanol mix substituted.

A sophisticated, three-stage Fore fuel system with triple pumps takes it from the tank to the engine, and Injector Dynamics 1700cc injectors feed it in…

There’s also water-methanol injection and – once again with quick quarter in mind – the nitrous injection which can be precisely controlled and is the secret to getting a few hundred extra horses at exactly the right moment.


Finally, a 76mm Techniflow (RGMotorsport’s proprietary exhaust brand), dual-tone outlet system with ceramic-coated manifolds.

Eyebrows raised to ask how all this finds its way along the drivetrain?

The six-speed auto is stock but with a Circle D, 245mm, torque converter and an uprated input shaft. Then a QA1 carbon-fibre propshaft (rated to 1500kW), a new differential with a Torsen limited slip mechanism and a shorter (3.7:1 versus 3.5:1) Ford Performance crown wheel and pinion.

Finally, all that power goes through Driveshaft Shop half-shafts,  also good for 1500kW, to (for road use) 22” wheels shod with al 285/25 and 245/30 rear/front combo which will be switched for dragging to 17” slicks.

READ MORE Rob Green conversion features here

Just in case, an emergency parachute brake and six-point rollover cage will be installed should the 10-piston Vari calipers not be sufficient for stopping.

Many other details have contributed to the project: fuel and gearbox coolers have been added and the engine-oil cooling system uprated. Rear seats have been removed and the front pair replaced with proper race seats/harnesses.

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