Quote:
Originally Posted by Simba
It would surprise me if they can pull a significant amount of extra power from it and retain emissions compliance. The F "economy" heads flow like crap compared to the G heads found on all the G(T)E engines, which are much easier to massage extra ponies from with valve timing tricks.
|
I'd imagine a change to Direct Injection will require a change to the heads.
Why would emissions compliance be difficult to retain? If, through optimised combustion the efficiency of the engine is improved, why would emissions increase?
What other engine has had its emissions increase as a result of Direct Injection being incorporated?