The first port of call before diving into this Caterham Sigma Throttle Body Conversion, was to install the Caterham on the rolling road to see what power the car produced. Graham keeps the car in impeccable condition and it had very low mileage so we expected the engine to be on the money with its claimed power and torque outputs. After the initial power run, the car produced 155.7HP and 123.1LB/ft which was slightly above the Caterham quoted standard.
We then got to planning and agreed with Graham to build the car a bespoke engine wiring loom to go with a new ECUMaster Classic engine management system and a set of Jenvey Throttle bodies. Graham also wanted us to install a lightweight flywheel and new performance clutch.