Originally Posted by
pani_k
..and I thought it was purely a power modification as it seems most of the quick-ish stuff has it like the ST170, Racing Puma, various BMWs, the V6 Mitsubishi's like the FTOs. The Honda system is different as that actually changes the cam profiles.
The standard 1.7 Puma has VCT as well, not just the FRP.
It gives a bit more power, but makes the engine more responsive / driveable rather than out and out power.
It's nowhere near as aggressive on Fords as the Vtec on a Honda as it runs from oil pressure advancing and retarding the cam timing, rather than a cam lifter on a separate cam lobe in the Vtecs.
http://www.youtube.com/watch?v=AcT_ZyY3F0k