VARIO system

[symbosis]

Hey there ppl..

I've heard and read about the VARIO system alot of times (concering BMW's and PORSCHES)

I dont exactly know what it is:poosie:

Anyone help..

thanks :thumbsup:

[Ashkente]

Their fancy name for variable valve timing.

[FiveFreshFish]

Porsche VarioCam (http://www.panix.com/~clay/cayenne/variocam.html)

BMW VANOS (http://www.bmwworld.com/technology/vanos.htm)

[GTS Jeff]

vanos is for camshaft timing, not valve timing. bms wariable walve timing is called something stupid like valvonic or something.

[cobber112879]

Originally posted by GTS Jeff
vanos is for camshaft timing, not valve timing. .

By adjusting camshaft timing, you are adjusting valve timing.

[SwitchBlade]

Originally posted by GTS Jeff
vanos is for camshaft timing, not valve timing. bms wariable walve timing is called something stupid like valvonic or something.

I believe you are a little off, Vanos as said previously is the variable valve timing. Which is just the manipulation of the intake and/or exhaust camshaft based on crankshaft posisition. Whereas Valvetronic varies the timing and lift of the intake valves. Which eliminates the need for throttle butterflies. The butterflies or throttle plates change the amount of air/fuel that will pass into the cylinder. From what i gather the valvetronic can adjust the air/fuel mixture better. It also eliminates the symptom of pumping loss.

Vanos= when the valves open
Valvetronic=how much the intake valve opens

http://www.bmwworld.com/technology/valvetronic.htm
http://www.bmwworld.com/technology/vanos.htm

[GTS Jeff]

Originally posted by cobber112879


By adjusting camshaft timing, you are adjusting valve timing. yes, but not directly. im just saying that valvetronic (remembered the name) acts "directly" on the valves to adjust their timing.

[cobber112879]

Originally posted by GTS Jeff
yes, but not directly. im just saying that valvetronic (remembered the name) acts "directly" on the valves to adjust their timing.

So the valvetronic is more suited to adjust duration, as opposed to timing?

[GTS Jeff]

Originally posted by cobber112879


So the valvetronic is more suited to adjust duration, as opposed to timing? well by adjusting duration, it also adjusts timing.