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VVT with 5 valve heads?
Posted:
Fri Apr 13, 2012 3:52 pmby thereddaikon
I have noticed that VVT isn't possible in the engine designer with 5 valve heads. Why is this? the Ferrari F355 from 1997 had VVT and it was a 5 valve design. Other than cost and complexity there is no reason why a 5 valve motor cant have VVT and VVL.
Re: VVT with 5 valve heads?
Posted:
Fri Apr 13, 2012 4:31 pmby Daffyflyer
I can't see how you could possibly fit the valvetrain stuff for VVL in a 5 valve head.
VVT is only missing because of a bug, and will be available for 5 valve engines soon
Re: VVT with 5 valve heads?
Posted:
Fri Apr 13, 2012 5:08 pmby thereddaikon
I don't think anyone has done a 5 valve motor recently enough to try, unless you count F1 cars. But Fiat's multiair system would be a decent bet. It's a very elegant VVT/VVL system.
Re: VVT with 5 valve heads?
Posted:
Fri Apr 13, 2012 5:16 pmby Daffyflyer
Oh agreed, multiair should be able to do it, but our only VVL so far is basically VTEC/Toyota VVTLi
Re: VVT with 5 valve heads?
Posted:
Sat Apr 14, 2012 4:07 amby thereddaikon
Is fully variable VVT and VVL in the works? Something like BMWs Double Vanos.
Re: VVT with 5 valve heads?
Posted:
Sun Apr 15, 2012 6:17 pmby LoSboccacc
thereddaikon wrote:I don't think anyone has done a 5 valve motor recently enough to try, unless you count F1 cars. But Fiat's multiair system would be a decent bet. It's a very elegant VVT/VVL system.
It comes with its own problems: for one is too big and can't be fitted with direct injection; Then it has diminishing return as engine size increases. But the throttless intake in neat