Manual Boost Controller

[William D. Robinson]

A few days ago, I helped a buddy put a TurboXS stage 2 kit on his new USA WRX. It cost $1700, and included a free-flowing exhaust, a Dastek Unichip all preprogrammed and a TurboXS manual boost controller. It added 50bhp and it spools a lot quicker.

So what does this have to do with us who are trying to Frankenstein some more power out of old Legacy Turbos????

I was particularly impresses with the little TurboXS bleed valve for controlling boost. It just Tees off the line on the way to the MAP sensor and tricks it into thinking that 16psi is only 12psi. It adjusts with an allen wrench, and did not freak out the ecu. Before I got me AVC-R I completely unplumbed the boost control solenoid valve and went to a crude adjustable check valve. This method is more sanitary and it also tricks the ECU so it won't cut the fuel at the stock level, but will still serve as an overboost control at your new higher level. Everything on the new WRX boost would be familiar to Legacy Turbo nut. Also I was impresswed with how it bled without creating a vacuum leak. It bleeds through holes in the grooves under a couple of rubber O-rings, so when it aint bleeding, it can't suck dirt and unmeasured air. It is easily repairable with generic O-rings from a hardware store. Damn nice.

Bill Robinson

[legacycentral]

I had also looked at the TurboXS products back when i was deciding
what controller to get. I was very impressed by the build quality.

How easy/hard was the Unichip to install? Isn't it just a plug-n-
play install?

Dave

[Z1Auto@aol.com]

OK guys...got one in my hands today froma WRX that we are doing an EVC Silver on. My question is: I think I found the stock boost controller, passenger side srrut tower,. has a vacuum line and an electrical connector on it, but I am not sure (I haven't received my factory manuals yet from the dealer).

Can anyone confirm if this is the right unit to tee into? the vacuum line runs to the turbo

car is a 91

Adam

[Gary Grahn]

You should be taking the factory control out of the equation when installing a new boost controller.


Gary Grahn

[Z1Auto@aol.com]

right....I figure it needs to be routed into itself if it has an ecu connection, or removed it is all vacuum lines, but I jsut want to make sure I am looking at the right part

Adam