Quote:
Originally Posted by freebeard
Emission controls never made the engine any cleaner* than when it was running in tune, just made them cleaner out of tune.
|
There is always some compromise between different parameters, such as PM and NOx which are inversely proportionate when it comes to either Diesels or newer gassers featuring direct injection, yet we can't deny some emission controls render it harder to find out how out of tune an engine might be at some moment.