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Here are the wheel dyno results with various airbox setups. Peak wheel bhp with the 907/912HC and Lotus airbox is 153.5bhp at 6000rpm. With the Jensen airbox, the same figure is 126.8bhp at 5450rpm. With no airbox, the same figure is 146.3bhp at 6040 rpm. With the original 907 engine and Jensen airbox, the figure was 102.4bhp at 5750rpm.
I've added the flywheel dyno results with various airbox setups. Peak flywheel bhp with the 907/912HC and Lotus airbox is 183.6bhp at 6850rpm. With the Jensen airbox, the same figure is 150.6bhp at 6460rpm. With no airbox, the same figure is 173.5bhp at 6680 rpm. With the original 907 engine and Jensen airbox, the figure was 118.6bhp at 6250rpm.
The figures suggest that, with an unrestrictive exhaust system, the Lotus airbox setup offers optimum power and torque.
Best wishes,
Nigel
Last edited on 08-12-2015 12:56 pm by NigelK