Here is the spec of your engine and it already has cams, etc:
The Seven America Zetec Supersport package includes; custom aluminum bellhousing, engine mounts, cast aluminum sump with baffle and windage tray, kit-ready engine wiring harness, one-piece throttle body fuel injection manifold, fully PC programmable direct fire ignition/F.I. control unit with mounting hardware, high performance street cams with fully adjustable vernier pulley set, spun aluminum air trumpets, ITG half-round high-performance air filter, annular clutch slave cylinder & release bearing with hardware, 9" clutch, 9.5 lb aluminum flywheel, front and rear O2 sensors, alternator, starter, water pump, coolant tubes & hoses, all necessary sensors, and mounting hardware.
# of Cylinders: 4 in-line
Compression ratio: 10.5:1
Ignition: Fully PC Programmable Direct Fire
Firing Order: 1-3-4-2
Fuel: Premium Unleaded 92 Octane
Fuel System: Throttle Body Fuel Injection
Maximum RPM: 7,500rpm
Maximum power: 202bhp @ 6,800rpm
Maximum torque: 165lbs/ft @ 5,000rpm
The ITB's are probably good for another couple of horsepower. If you have an SVT head, you maybe have 210hp
From what I have been told, this is about the most power you can get out of the Zetec without spending big bucks and sacrificing reliability (or going forced induction), so I would be really impressed if the car Tony was referring to has 240hp, perhaps it was something other than a Zetec?
One of the local guys here put a supercharger on his with good results, but said he could really feel the weight of it on the front of the car and ultimately ditched in favor of a Duratec motor.
The newer cars come with the Duratec, which is an aluminum block, it is lighter and more tunable, 250-265hp is easy to get out of it.
Also, quite a few guys have put Zetec powered Sevens on wheel dynos and got no where near the power that Caterham claims for the motor, some are stating that the engine is 185hp max based on their results.
That said, I don't put a lot of stock in wheel dynos for anything other than tuning and the car sure feels like 200hp. The car does 0-60 in 3.8-4.0s with the 200hp Zetec motor in it.
I have to say the Zetec is quite fabulous in the car, it is quite torquey with a pretty flat powerband, and the 6-speed gearbox is sex