Quote:
Originally Posted by MJones_RB
... and a de-carboning of the engine intake area...
|
Why did they do this? The FA20 in the FR-S/BRZ/86 doesn't have carbon build up issues like other Subaru direct injected engines, such as the FA20 in the 2015+ WRX. Our engines have port injection along with direct injection, which helps keep the intake ports and intake valves clean, so "de-carboning" shouldn't be necessary.