About to do the cheap profec mod, one question I have.

[TooFastTooG]

Hey guys, Im doing to do the cheap profec setup for my 2g eclipse. I have been reading threw the tech articles and they have been a little confusing becuase the tech aritcle that deals with using the stock bcs is for a 1g.

So I have drawn up this little diagram using paint, and I drew it as if you were looking down at the engine bay, Im not worried about the electrical connections as I know how to do that, this is for the vac lines. So I think the picutures speaks for itself. btw yes I do relize I will throw a cel light doing this.

 

[v2ner]

Why don't you just use the MBC alone? That way you don't have to hook up the BCS.

 

[TooFastTooG]

Because I am hooking it up so I go from stock boost, to about 16psi with the flick of a switch. Something alot of people do.

 

[v2ner]

I'm guessing you don't like to keep it at 16psi and not floor it.

 

[bluegs-t]

you're going to have to run 2 different fuel set-ups to optimize tunes on 2 different boost levels though... i use to run a 2-stage mbc on my GS-T. i ran it at 9psi and 15psi. the problem i had was that it was rich as hell at 9psi, and ok at 15psi. i basically ended up running it at 15psi, and got on it only when i wanted to... unless, you like changing from one map to another on an afc, your best bet is to just leave it at 16psi!

 

[TooFastTooG]

Well yeah, im not gonna say I drive around all day at wot. But having this done would be a nice little mod to help me get better gas mileage. I'd keep it at stock boost levels going to and from work/school. Then when I need that extra power, flip the switch.

So does anybody know where the line goes?

 

[DSM90AWD]

So does anybody know where the line goes?

Originally it would connect to the intake's air cleaner canister for emission sake, but just let it goto ATM

 

[TooFastTooG]

So I do not need this line to complete the "loop" thats allows me to switch from stock boost to user set?

 

[DSM90AWD]

Looking at the Tech Article it seems you tee this line in with the MBC outlet.

 

[bearman]

yes, you must tee in to both sides of the manual boost controller (MBC). one between the BOV and the MBC and again between the wastegate and the MBC. that way when the solonoid is open, the wastegate gets full boost pressure and opens at about 9psi and when the solonoid is closed, boost must go through the MBC and the wastegate will open where you set the MBC

 

[TooFastTooG]

yes, you must tee in to both sides of the manual boost controller (MBC). one between the BOV and the MBC and again between the wastegate and the MBC. that way when the solonoid is open, the wastegate gets full boost pressure and opens at about 9psi and when the solonoid is closed, boost must go through the MBC and the wastegate will open where you set the MBC

Hey thanks all for the help, the post above cleared it up perfectly.

Ill do a write up as well so others can see.

 

[90 TSI FWD]

there were 2 tech articles on the switchable boost settings. is this the one you saw? http://dsmtuners.com/forums/showthread.php?t=196100
that's the one i referred to and the diagram and pictures explain everything easily..