Positive displacement and bypass actuator question

[nateleduc]

I planned on posting this to my other thread, but was afraid it would be too far buried.

I'm working on the mold currently, and have two quick questions.

Question 1:

The bypass actuator - in its current location, its going to severely impede airflow to cylinder 1 and 3. The problem is that it hangs very low and in the way. Thus I want to relocate it. Now it looks like the actuator has a positive and negative vacuum side. Is this necessary? I was looking at a few other vacuum actuators, ones that I could easily relocate, but they look to only have a single vacuum port.

Anyone care to offer a better solution?

Question 2:

Here is a early picture of the mold:
http://i.imgur.com/ZVaEGzs.jpg

There is alot of empty space inside. Would it be better for airflow occupy more of the inside? I was thinking of having a pyramid type block in the center to divert air.

What do you guts think?

[SSlowBoat]

id say leave it open inside, pressurized chamber that the cylinders can feed off of, as opposed to a pyramid in it. the air is being forced in as opposed to sucked in as in na, and with a divider, you could potentially create turbulence. if you leave it open you could possibly shove a intercooler coil in there no?

someone with more roots knowledge should comment, but i think as long as the diverter opens in off throttle/vacuum conditions, a single port one would be ok. im not sure though, i have to do more research on roots stuff, but i cant see it being much more different than a centrifugal with a blow off.

i am not an engineer, just an overly inquisitive mind that looks up alot on how things work etc.

[firebird_1995]

On the bypass valve, you just need the vacuum port to operate the valve. The other side is over boost protection (in the stock application I believe).

I would not be concerned with the open space.

[SSlowBoat]

Thank you^

[nateleduc]

On the bypass valve, you just need the vacuum port to operate the valve. The other side is over boost protection (in the stock application I believe).

I would not be concerned with the open space.


Fantastic. I was looking at using a modified m90 bypass actuator