Tag Archives: Cam

Libre, Hillclimbing, Guernsey Bus – Chevron Cosworth B17C #F2-70-2

Alongside the production of nine Formula 3 Chevron B17 1 litre / 61 cui “Screamer” Formula 3 cars Chevron built 5 examples of the B17B powered by Vegatune Ford Twin Cam engines in 1598cc / 97.5 cui form for US based SCCA Formula B competitors and two B17C’s one with a 1598 cc / 91.5 cui Cosworth FVA engine to compete in Formula 2 and the other today’s featured chassis #F2-70-2 which was originally supplied to compete in Formula Libre events.

Chevron Cosworth B17C, Silverstone Classic, Press Day

Steve Thompson had the car fitted with a 1790 cc / 109.2 cui Cosworth FVC engine and is believed to have won at least 14 Formula Libre races with the car in 1970. The ownership trail then includes Frank Mumford and Alex Seldon, the latter is believed to have fitted the car with a 2 litre / 122 cui BDA in 1972, but neither owner is known to have competed with the car.

Chevron Cosworth B17C, Martin Bullock, Silverstone Classic, Press Day

In November 1972 Malcom Brown is believed to have raced the car at Brands Hatch and in April the following year Richard Leech drove the car in a Libre event as Castle Combe, Deryck Cook advertised the car for sale now powered by a Ford Twin Cam before Philip Sandwith in Guernsey bought it from Spencer Elton in Wiltshire.

Chevron Cosworth B17C, Martin Bullock, Silverstone Classic, Press Day

Philip competed in hill climb events from 1975 to 1978 with #F2-70-2 now fitted with a Holbay twin cam engine that helped him secure numerous class records, Guernsey Bus garage manager Mike le Cras ran the car at the Le Val des Terres hill climb in St Peter Port Guernsey in 1983.

Chevron Cosworth B17C, Martin Bullock, Silverstone Classic, Press Day

The ownership trail then leads to Australian Martin Bullock who is seen driving the car in these photographs at the Silverstone Classic press day in 2013, with a 1967 – 1971 Formula 2 spec Cosworth FVA fitted. More details on this car can be found on Allen Brown’s Old Racing Cars.com website.

Thanks for joining me on this “Libre, Hillclimbing, Guernsey Bus” edition of “Gettin’ a li’l psycho on tyres” I hope you will join me again tomorrow when I’ll be revisiting Nottingham circa 1985. Don’t forget to come back now !

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Big Valve Special – Lotus 74 Europa Special

In 1971 Chief Engineer Mike Kimberley oversaw the development of the upgraded Lotus Europa Twin Cam Type 74. featuring a 105 hp Twin Cam motor coupled with a stronger Renault 4 speed gearbox.

Lotus Europa Special, Goodwood FoS

The upgraded Europa featured a 105 hp Twin Cam motor coupled with a stronger Renault 4 speed gearbox.

Lotus Europa Special, Goodwood FoS

After the first 1580 Europa Twin Cams has been built the Europa model was again upgraded with a 126 hp ‘big valve variant of the twin cam motor.

Lotus Europa Special, Goodwood FoS

The first 200 ‘Big Valve’ Europa’s were planned as a limited ‘Europa Special’ edition of 200 featuring the black and gold “John Player Special”, tobacco brand, paint work of the works Lotus Racing cars which won the 1972 World Constructors Championship and World Drivers Championship with Emerson Fittipaldi at the wheel.

Lotus Europa Special, Goodwood FoS

The 200 ‘Europa Special’ limited edition vehicles, all featuring a 5 speed gearbox, launched in September 1972 are distinguishable by a numbered badge on the dash panel.

Lotus Europa Special, Goodwood FoS

Such was the popularity of the Europa Special that the model was continued after the initial planned batch of 200 had been built sans numbered dashboard badges and in a variety of colours including black and gold until 1975.

Lotus Europa Special, Goodwood FoS

I was unable to discern if the 1972 Europa Special seen here is one of the first 200 numbered cars, or one of post limited edition models, when I saw it at last years Goodwood Festival of Speed. Note how the rear bodywork has been tidied up to give better rear visibility when compared to the Type 54 Europa I looked at last week.

Lotus Europa Special, Goodwood FoS

A Europa with the big valve motor was tested in period carrying a passenger from rest to 60 mph in 6.6 seconds and with a maximum speed of 122 mph. In all 3130 big valve Europa Specials were built from September 1972 to 1975.

Thanks for joining me on this ‘Big Valve Special’ edition of ‘Gettin’ a li’l psycho’ on tyres’ I hope you will join me again tomorrow when I’ll be reviewing last weeks Bristol Italian Auto Moto Festival. Don’t forget to come back now !

12 05 09 Lotus Type 74 disambiguation, it has come to light that at least one internet source lists two Lotus Type 74’s one the Europa Twin Cam / Europa Special and the other an open wheel Formula 2 car, former Lotus employee Rob, Kayemod on The Nostalgia Forum, has kindly informed me that the Formula 2 cars were only ever referred to at the Lotus factory as “Texaco Stars” in deference to their sponsor and that the Type 74 designation seems to have been applied to the racing car retrospectively.

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Variable Inlet Cam Phasing – Nissan Skyline GT R33

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This 1996 Skyline GT R33 is a two wheel drive forth generation Skyline. The front bumper and spoiler on this one appears to be an after market item.

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Power was delivered by an RB25DET 250 hp twin turbo 2490cc / 151 cui straight 6 engine which featured variable inlet cam phasing ( NVCS ). Many of these vehicles have been sent to engine specialists for radical tuning, racing versions of these engines have shown over 500 hp.

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It is thought that 217,133 R33 Skylines were produced from 1993 – 1998 and sold in Japan, Hong Kong, Australia and the UK, although officially imported many more are thought to have arrived in the UK as personal ‘grey’ imports.

Hope you have enjoyed today’s NVCS edition of ‘Getting a little Psycho on Tyres’ and that you’ll join me again tomorrow. Don’t forget to come back now !

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