Quote Originally Posted by ferdine View Post
You said "in general" so I would say, just IMHO, the future is i-VTEC. It is in constant development because of widespread tinkering by independent tuners. Parang de-facto sa mga variable valve timing. Honda will be driven more to advance the technology because of wider following among enthusiasts. They were the first to introduce it commercially in mass market so they have the advantage.
I've seen a video lately with a K20 smoking an EVO. Medyo controversial but I liked what I saw. Afterall, Honda still rules in F1. Not Toyota, Mitsu, or Toyota.
1. Honda's R&D has got nothing to do with "tinkering by independent tuners".

2. Nissan was the first to produce a VVT powered vehicle.

3. K20? Evo? From Top Gear's power laps:
1:36.5 – Honda Civic Type-R
1:31.6 – Honda NSX Type-R
1:26.0 – Mitsubishi Evo VIII MR FQ-320
1:24.8 – Mitsubishi Evo VIII MR FQ-400

4. F1? Errr... those F1 cars don't employ variable valve timing. How about WRC? Those rally cars do employ variable valve timing. :lol:

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If you want the most advance... those would be the toyota's VVTL-i, Honda's I-VTEC & Porsche's VarioCam Plus. Pity that Toyota discontinued the VVTL-i already since it cannot meet new Euro emmission regulations.

The above three are capable of cam-changing & cam-phasing.

Among the three, Porsche has the most sophisticated system then followed by Toyota.

Honda should have been as sophisticated as Toyota's had they opted to also apply their system to both the intake & exhaust valves.

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Though being the most advanced doesn't necessarily mean the most powerful. BMW's Double VANOS application in their new inline-6 engines are the most powerful considering their displacement. Their 'normal' 3.0L engines makes around 255hp while most of the competition uses a 3.5L engine trying to hit that mark. After that, consider also their ///M engines! 330hp from a 3.2L inline-6! 500hp from a 5.0L V10! Almost nothing comes close pound-for-pound for naturally aspirated engines.