One of the crowd-pleasers at the weekend’s King of the Hill at Ceres was the twin-engined Golf of Robbie Ferroli.

One of the crowd-pleasers at the weekend’s King of the Hill at Ceres was the twin-engined Golf of Robbie Ferroli.

The sight of the neon orange missile scrabbling up the Gydo pass, leaving Porsches and other exotica in its dust, had the crowd cheering. Fitted with two 1800 16V GTI engines, each with a KKK K26/27 hybrid turbo (set at one-bar boost), Robbie says the car has 400 kW on tap - 200 kW per motor - at about 6 000 r/min. Drive is through VR6 gearboxes.

And that’s not still enough power for Robbie. “I’ve ordered intercoolers that will enable me to dial in a bit more boost, say 1,3 bars, and that should get me 250 kW from each motor.

“The hillclimb was a testing ground, as we finished the car only a couple of days beforehand. At the King of the Mountain, I found I was getting too much wheelspin at the front. The car already has a limited slip diff at the rear, so next on the agenda is install one for the front.”

Robbie is Golf mad, having built up a twin-turbo VR6-engined Jumbo Golf for last year’s hillclimb. The engine came from his Jetta racing car, which he had crashed, and was bored out to 3,1 litres, fitted with Ferroli gas-flowed heads and hot cams.

“There are no wild cams available for the VR6, so we had to cut our own, based on Golf four-cylinder, eight-valve profiles and good for 7 000 r/min.

“But with the twin turbos as well, the motor put out too much power for the front wheels to handle, they just kept spinning and I couldn’t get the power down.” This despite 16-inch Momos fitted with 205 Bridgestones…

Not one to sit around and twiddle his thumbs, Robbie has also built a four-wheel drive turbo Golf, by buying a VW four-wheel drive system from the factory and fitting it to a Jumbo shell. Then he bought a factory-built four-wheel-drive with a broken supercharger, which he replaced with a turbocharger, giving 220 kW.

“I’m always looking for more power, so then I built up the VR6, on to which I bolted twin turbos and got 320 kW. However, Golf gearboxes aren’t happy with anything over 280 kW so at the end of the day I decided the twin-engined, twin-gearbox route was the one to take.

“I chose a Citigolf because it is light, so I bought a roadgoing 1990 model and stripped it down. It took me about four months to convert, working every night. First we resprayed the shell and then got to work on the mechanics.”

Fitting the extra engine into the boot required a fair bit of chopping and welding. Robbie cut out the inside of the fenders and fitted Jumbo front suspension complete with mounts, then welded in a Jumbo front subframe. He also designed and built a full rollcage, with crossbracing across the back and reaching to the front strut mountings to strengthen the whole unit.

"Everything in the car is Golf, nothing from any other make.”

Specifications of the Stabilo Boss Orange Golf:

2 x 1800 16V GTI Engines

2 x KKK K26/27 hybrid turbos (one bar boost)

2 xVR6 gearboxes

2 x Domingo fuel managment systems

550cc injectors

AP brakes 305mm

Rally golf gearshift

17" TSW Apex rims

215/40/17 Yokahama Tyres


Engine Outputs

Approximately 400Kw at 6400 r/min

0 - 100km in 4,3 seconds

Top speed geared for 265 km/h

Interior

VDO gauges

2 x Raceline racing seats

Momo steering wheel

Rally gearshift

Chequered plate flooring

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Original article from Car