Air relief valve 2 - What is it?

[welshkid]

Looking at the Haltech elite 2000/2500 plus the PNP wiring harness, they list the elite 2000 and 2500 being the only ones compatible with the sequential system, I've gone through the pinout ( here: ) and found the following pins:

The only (relevant) difference the 2500 has over the 2000 is that it has the outputs for "Air Pump Clutch Relay" (I guess this just tells the pump when to inject air? I'll be deleting the pump anyway so not really a problem)
My question is what is the "Air Relief Valve 2" output for?

It's probably a silly questions but everyone seems to use slightly different terms for the components of the system so I want to make sure I know what I'll be getting. Also they mention outputs for EGR, which isn't on a JDM car, and Purge control (Which I think is the charcoal canister system?)

 

[Spendyrx]

I doubt you'll need air relief or anything egr related tbh Andy! There's a pic of the rats nest for you to see what things are!
Pretty sure someone like @GAVBEY would help you nicely in this situation

 

[GAVBEY]

Air relife valve 2 is probably the secondary bov. if i remember correctly theres a blow off valve for each turbo.

Just go single turbo. much less hasle haha your going to hate me for saying it but its 100% true

 

[welshkid]

Cheers guys, think if I just ditch some of the egr stuff I can re-purpose an output to make sure its triggered.
Going single is definitely on the cards after next summer I think. Want to give the twins a chance before being too drastic haha

 

[GAVBEY]

Cheers guys, think if I just ditch some of the egr stuff I can re-purpose an output to make sure its triggered.
Going single is definitely on the cards after next summer I think. Want to give the twins a chance before being too drastic haha

Good idea. theres outputs free for like the regulator solenoid and all sorts of jazz.

Twin turbos is nice down low for sure but the hastle of trying to keep them alive is stressfull. Simplicity is key, but give them a shot befor cutting them off with a 10" Grinder