HKS EVC IV question

[GTaaargh]

Hi.

My HKS EVC IV instructions say: Ports 1, 2 and 3 must face upwards with port number 4 facing down.

The person who installed it into my GTR in Japan put it down flat under the pods. All ports are at the same level.

Does anyone know why it MUST be vertical? Does anyone know of any side effects of having it flat?

While I'm asking, does anyone know what port 4 does?

Many thanks,

James

[nitemare5]

if my memory serves me correct port 4 is for the external gate

[tang0]

its to do with any oil thats gets into the system draining down as far as i can remember ...

and yes, that is for an external wastegate ...

[GTaaargh]

Hmmm ... What do you think would be the consequences of getting oil in it, and not being able to drain it out?

The setup doco I downloaded from the US HKS site only shows the left and centre ports on the top being connected to the external wastegate.

There is nothing in any of the diagrams in the Japanese manual that shows port 4 being connected. Do you think maybe I am supposed to take the cap off occasionally and clean out any collected oil?

Update: Ricky from mrcontrols.com says:

The 4th port is the air vent used to maintain steady reference pressure in the actuator. They tell you to point it downward to prevent possible water or contaminants from leaking into the control system. If you have the unit mounted in a location where it cannot get wet or extremely dusty, you should be fine.

It sounds reasonable, but some of the threads on oil bottles suggest there is likely to be oil vapour in the air. The air goes through the actuator. There is a good chance oil gets into the actuator too.

Any thoughts?