Quote Originally Posted by aaronng View Post
Explain to me how you achieve 100% VE with an NA engine. As long as your intake manifold has a vacuum, you will NEVER reach 100% VE.
Well we all know that as a rule that N/A engines do not operate at 100% VE. But in a very narrow RPM it does hit 100% and some surpass 100% with tuned motors.

iVTEC does brings a broader range of high VE throughout the RPM compared to VTEC. But its not impossible to hit 100% VE with a N/A motor, just not everywhere in the RPM.

Of course Turbos can do it but thats cheating

Anyway while we were on the topic of these things I thought I'd post this interesting page about HONDA's background. Its a good read!
http://www.ek9.org/forum/engine/2631...enjoy-ek9.html