The majority of JAP 4 cyl technology is forced induction ... and that's what makes them go fast. On the other hand there are a few N/A 4 cyls out there going quick ... what does help them though is they are light enough to do it (and they are usually stripped out to bare shell to do it as well.
Variable valve and cam timing is more aggressive than what is tried and used in the Falcon as well ... Ford's VCT is very tame compared to Honda's VTEC/Mitsu's MIVEC/Toyota's VVTi , etc.
From what i have seen ... for a decently quick I6 N/A ... you need to do much more than whatxr8ute mentioned ... and more than just a good cam and head package as well ... the rest of the engine needs work as well to compliment it ... blueprint and balance ... and a fair amount of dollars thrown in as well. It then becomes more of a track car and not a street vehicle.
|