Benefits of going VVT-i? Options

[Random_Stranger]

Ok, so I just found out that VVT-i was like dual variable valve timing for HP and TQ. So anyone know how this is beneficial or worse in let's say a 3sgte engine? As I am aware there is a 4th gen engine that has this VVT-i technology (I think).

(I had made a n00b out of myself with the original posting, so I made this thread up to make up for it in another n00bish fashion, but with more to gain from it than my original thread, so my bad.)

This post has been edited by Random_Stranger: Dec 28, 2009 - 6:58 AM

[Supersprynt]

They help overall efficiency. Power, fuel economy, emissions. There's not a whole lot of power to be gained. VTEC is essentially the same thing. Both are timing controllers.

[Random_Stranger]

They help overall efficiency. Power, fuel economy, emissions. There's not a whole lot of power to be gained. VTEC is essentially the same thing. Both are timing controllers.

Oh ok, but don't all variable valve timing on engine by different make have essentially a specific design that separates them? I am certain most of you are saying "Faust! Read on it foo!" but this is just for discussion sake. Because as I said, I failed big time on the original thread and so I just put this up instead. Otherwise I would have just deleted this thread if I had the ability to.

Like, for instance, if VVT-i were included in a newer 3sgte engine, would anyone be interested in that? Just going off of what they know about the 3sgte, and what they know about VVT-i and it's properties.

This post has been edited by Random_Stranger: Dec 28, 2009 - 7:04 PM

[Hanyo]

They help overall efficiency. Power, fuel economy, emissions. There's not a whole lot of power to be gained. VTEC is essentially the same thing. Both are timing controllers.

Oh ok, but don't all variable valve timing on engine by different make have essentially a specific design that separates them? I am certain most of you are saying "Faust! Read on it foo!" but this is just for discussion sake. Because as I said, I failed big time on the original thread and so I just put this up instead. Otherwise I would have just deleted this thread if I had the ability to.

Like, for instance, if VVT-i were included in a newer 3sgte engine, would anyone be interested in that? Just going off of what they know about the 3sgte, and what they know about VVT-i and it's properties.

vvti doesn't really help with turbo charge engines because under boost the air restriction bottle neck would be lessened. VVTi was orginally created to help all motor engine breath better while maintaining torque. This is the same reason why you dont see motorcycle engines with vvti. They don't need torque so everything part of that engine can be geared towards reving up and making a ton of horse power.

Reving a turbo charge engine that high is simply not a good idea.

To really beat a dead horse, vvt was design for all motor engines to shift the power band higher into the RPM range with out the consequences of no torque, bad idle, bad fuel economy.