Which car? (all the help i can get :))

[Konan555]

"The effect is like" and "in some cases"

There's a multitude of related technologies, as Fox pointed out, there's loads of VTEC variants.

[Howard]

They switch from 8 to 16 valves and back, dependent on how quick you want to drive.

Vtec is nothing to do with the valves or cams.. It's to do with the engine's breathing isn't it?

[herulach]

Vtec is nothing to do with the valves or cams.. It's to do with the engine's breathing isn't it?

No, vtec changes between 2 cams (altering timing), vvti changes the cam phase (altering where abouts in the cycle which valves are open, then i-vtec and vvtl-i do both.

You can get stuff that does variable intake/exhaust manifolds though, porsches have them, and some other stuff i cant recall.

[Howard]

Ah yes.. I just defined Vtec on Google and it says that

Edit: Yes I can see how I got mixed up now

[Moby-Dick]

Wiki to the rescue
http://en.wikipedia.org/wiki/VTEC

Insurance group isn't everything - I think you should set an insurance budget first and try for a few quotes ( bear in mind specialist insurance companies can save you quite a bit. )

Why not buy something quick and get an lpg conversion on it ?

I know a few people with LPG'd 200sx's and they get diesel running costs with 280bhp fun