Thanks for looking - here are pics of a cutaway Mazda 2.3 direct injection turbocharged intercooled 274 bhp motor used in the Mazdaspeed 6.
The motor foundation is shared with the Ford Escape, Focus, Ranger, and Fusion, the Mazda B2300, Tribute, 3, 5, 6, and new MX5, as well as the CX-7. It's constructed of an aluminum block and head, and is made in displacements of 2.0 and 2.3 liter.
This motor pictured is by far the most powerful version, being turbocharged, intercooled, and direct fuel injected.
Check out the turbo and exhaust manifold - the manifold has a flex pipe built into it between cyl's 2 and 3 to help control warpage and cracking from motor expansion and contraction during it's heat up and cool down cycles. Good idea!
The air to air intercooler sits on top of the motor, directly over the valve cover, making this a very compact setup.
Side cutaway - showing the forged rods, pistons, crankshaft, variable timing intake cam and valvetrain.
Closeup of the intake ports and combustion chamber - the ports look very straight meaning excellent flow to the valves.
Here's a closeup of the direct fuel injection setup. Direct Fuel Injection means the fuel is delivered directly into the cylinder ahead of the valve instead of the traditional behind the valve arrangement of most gasoline port fuel injected setups. Note the size of the fuel rail and the injector's location entering directly into the cylinder, next to the intake valve. This is by far the most superior way of getting fuel inside an engine. It is also the most complex method, since fuel is sequentially injected directly into the pressurized combustion chamber.
Side view showing the intercooler, intake runners, and drive by wire throttle body (behind black cap).
Rear view, showing intake manifold runner control (IMRC) motor and turbocharger. The IMRC closes off the ports at low rpm to improve torque and cold weather startups.
Shot of the turbocharger. Note the oil drain line location.
Shot of the variable cam timing (VCT) assy built into the front of the intake cam gear. VCT allows for advancing/retarding the cam's opening time to help optimize it's function throughout the rpm band.
Note the large gear on the crankshaft - this is used by the balance shaft assy located in the oil pan. it's there to cancel out motor vibrations for a smoother running motor. The bad news is it robs about 5hp from to motor to turn the balance shaft.
The black can on top of the oil filter bypass and mount is a water to oil cooler which uses the engine's coolant from a heater hose to keep oil temps down. This might be a nice add on to non-turbo motors as well.