Originally Posted by CooperMan
Originally Posted by SimonH
Originally Posted by CooperMan
I used to sometimes drive it (cough) properly on the second set of cams and it would bounce on the rev limiter just the same, as you know they can be surprisingly quick


Second set of cams? It didnt have variable valve timing....

Probably my bad description, & I bow to your much deeper knowledge of the V6

I did think it had some form of variable cam phasing as each pair is driven by separate chains, allowing one pair of valves to have little effect until around 3500rpm, giving good economy at part throttle

As rpm increases above the economy level, the intake tracts open allowing the 4 valves to take effect with the ECU giving more advance via electronics and the cam phasing, hence the feeling of power & engine 'on song'

Am I close Simon ?


Not quite...
That's sort of how the Jaguar version works- but its only phasing the cam timing rather than opening extra valves - although that said it does have valves in the inlet manifold that lengthen or shorten the inlet tract


Originally Posted by RichardV6
I think it was the more powerful Jaguar variant that had VVT and variable air intakes Jon. The ST220 engine had DAMB (direct acting bucket tappets).


The Jaguar engine is the one with direct acting buckets, The Ford engine has finger followers

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