Early Warning Systems

Oil pressure switches

Low oil pressure switches are offered as alternatives to the" whoops its too late" pressure warning transmitters fitted as original equipment, ours provide a warning when the oil pressure drops below the desired running pressure, they can irritate by actuating a warning when the engine is ticking over but are absolutely essential for spotting signs of trouble in a competition engine.
They have a 1/8 NPTF thread so screw into matching thread on T piece and use a suitable pressure gauge adapter on the thread vacated by original transmitter. We also offer a fuel pressure warning switch for carburettor engines, an essential to warn of failing pumps, blocked lines or filters all of which can cause a weak mixture to melt pistons in seconds on a highly stressed engine. A nil pressure fuel switch may be fitted downstream of an electric fuel pump to turn pump off in the event of an accident resulting in fuel line rupture etc.

T pieces and oil pressure gauge adapters.

All engines have a tapping on an oil gallery to take the oil pressure warning transmitter, we make a range of T pieces to screw into this tapping, T pieces have one male thread to screw into the oil gallery, a female thread to take the original transmitter and a female 1/8 NPTF tapping which allows a pressure switch or a 1/8 BSP female pressure gauge line to be attached via a MMS10-3-3 adapter.
The chart below shows tapping thread for most engines.

Alfa-Romeo Alfasud	M14x1.5	Colt	1/8BSPT	Lada	M14x1.5	Saab	1/8NPTF
Alfa-Romeo remainder	M10x1	Datsun	1/8BSPT	Lancia	M14x1.5	Simca	M12x1.5
Austin/Morris	1/8NPTF	Fiat	M12x1.5	Mazda	1/8BSPT	Skoda	M10x1
BMW up to 1969	M10x1	Ford up to 1971	1/8NPTF	Opel up to 1973	M14x1.5	Subaru	1/8NPTF
BMW from 1969	M12x1.5	Ford from 1971	1/4NPTF	Opel after 1973	1/4NPTF	Toyota	1/8BSPT
Chevrolet	1/8NPTF	Hillman	1/8NPTF	Porsche	M10x1	Triumph	1/8NPTF
Chrysler/Talbot	1/8NPTF	Holden	1/4NPTF	Renault	M14x1.5	Vauxhall	1/4NPTF
Citroen CX	M14x1.5	Honda	1/8BSPT	Rover 2000	3/8BSF	Volkswagen	M10x1
Citroen remainder	M12x1.5	Jaguar/Daimler	1/8NPTF	Rover V8	1/2UNF	Volvo	1/8NPTF

Warning lights

These are of little use if they are not immediately visible, ours are 29mm diameter with a choice of red, yellow, green, blue or clear lens, they have a removable diffuser under the lens which may be titled using dry print lettering. A T5.5 side contact bulb is accessed from the front and is sealed against ingress of dust, oil and water. Weight is 1.5 grams.

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