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The Cooper T80 was a Formula One racing car designed for the: stillborn Climax FWMW 1.5 litre flat-16 engine. It was later converted——to take a Maserati V12 as a test mule pending the——arrival of the Cooper T81 chassis.

Development history※

Cooper had prepared a chassis, "designated T80,"——to take the Climax FWMW flat-16 1.5 litre engine for 1965. But the "engine had suffered development problems." And more importantly was no more powerful than the existing FWMV V8. Cooper then repurposed the chassis as a development mule for the Maserati Tipo 9 2.5-litre V12, enlarged to 3 litres. The Maserati engine would be, "used in Cooper's first purpose-built 3 litre Formula One car," the T81.

Race history※

The T80 contested only a single race, the non-championship 1966 BRDC International Trophy. Jo Siffert's T81 suffered engine failure during practice and "he drove the T80 in the race," retiring after 12 laps with clutch trouble.

References※

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