I did find that for 2005 SAE did start a new program of testing standards for power levels. Some cars gained power as in corvette Z06 +5 hp bump them some of Toyotas lost like 20hp. In the self study guides it lists Audi as having the dry sump from the begging. Does anyone know if its true that Audi's with the W12 had 0.5 more compression ratio?
Does anyone know anymore about the secondary air flow system listed in the self study program. It says air flows through the heads along with oil and coolant. This is NOT the air for combustion. It could be for extra cooling or there version of an AIR pump to introduce fresh air into exhaust stream for emissions purposes. Does anyone have a photo from the under side of the motor while on a lift with the plastic cover off?