As you all know I'm building a 4x4 saph engin gearbox and drivetrail into a focus st225

This is the spec of the donor car, I just want to know for the guys that have tuned these motors...

What do I need to change to get the motor to 500, 600 and 700hp ?

Please post as much criti as you can don't beat around the bush !!!!


FORD SAPPHIRE RS COSWORTH 4X4 TURBO
IMPORTED FROM THE UK IN 2001 SA REGISTERED*
RUNNING A STAGE3 3,
330bhp 270+km/h
12.7 1/4 mile on standard T3 turbo 1.4 bar boost
GENUINE 500 FORD MOTORSPORT 3 SPOKE STEERING WHEEL
GROUP A HEAD GASKET
ARP HEAD BOLTS, POLISHED AND PORTED
GROUP A CAM BELT
STANDARD COSWORTH CAMS VERNIER AND VALVES
COSWORTH MAHLE PISTONS AND CRANK
UPRATED T3 GARRETT TURBO*@ 1.4 bar boost
RS5OO INTERCOOLER
803 DARK GREEN BOSCH INJECTORS
3 BAR MAP SENSOR*
G3 AHMED BAYJOO CHIP
GGR SILICONE HOSES WITH GGR UPRATED TWIN POT BREATHER KIT**
PIPERCROSS CONE INDUCTION
76MM SCORPION LIGHT WEIGHT PERFORMANCE EXHAUST SYSTEM
UPRATED 6 PADDLE BUTTON CLUTCH
300MM VETILATED CROSSED DRILLED AND GROOVED BLACK DAIMOND DISCS AND PADS
REAR 270MM VENTILATED CROSS DRILLED DISCS AND PADS
POLY BUSHED SUSPENSION KONI ADJUSTABLE SHOCKS FRONT AND REAR*

Sadly That is all the info I will ever have on the car as the owner died racing this car the car rolled the body is a wreck but somehow the car still starts and interior is perfect

 

For 500 you can probably get away with just an ST inlet manifold, some cams, a rwd exhaust manifold and a bigger set of injectors and a remap.

600+ I would be looking at a total engine build though TBH and the head in particular will need a lot of attention.