hi you got airfiter to maf to a elbow to ? whats the box?,to a elbow? to the throttle/top bit of engine.

whats the big black box called and the elbow with 3 pipes coming out of it to the throttle?

 

what car do you have?

 

 

its a 94 wrx, its a after market cone filter, so is the think after the maf a air box? labeled subaru in pic on right

 

Resonator... makes the induction noise quieter. It has a pipe from the Idle control valve connected to it and a vacuum feed from the boost solenoid too.

Gaz

 

Airbox (with panel filter inside) ---> MAF unit ---> 90deg 80mm hose ---> 2nd resonator chamber (quietens down intake air) ---> 90deg 70mm-to-58mm turbo intake hose...

EDIT: Plus what Gaz has said about the pipes to the resonator lol

 

do you have a second resontoer one even if you have the standard box airfilter?

 

this 2nd resonator what do you do with the pipes if you went for a straight hard pipe

 

Pretty sure you can leave the boost vacuum one vent to atmos at the resonator end... that pipe has a small brass restrictor pill in it so the pipe has to stay connected at the boost solenoid end.

Think the Idle control valve one would need to stay connected to the intake... guessing it needs to be connected after the MAF as it needs to be metered air?

Gaz

 

you def can vent the boost vacume pipe, i was going to mod this box as i have seen some that have straight pipes i want to free up flow and get louder :-) im looking for apart that will fit in place rather than a d.i.y. may be best left as is

 

Yeah, the BCS's bottom vac vent hose can be left to VTA, but you best fashion a port for the res. del. pipe for the ISCV's intake return hose.

Either that or try to get hold of the MRT res. del., or the K&N 57i, or Apexi Power Intake one, for the MY93-96 cars...

 

kind of like this guys

The pipe of boost solenoid can vta but need brass pill in pipe still and the other hose (idle control valve) has to re-connect after maf

 

lol I'll have a set-up identical to this very soon...

 

im thinking keep the standard airbox i dont have the res in the wing thats gone mabe do this mod not to sure where can i buy one of these res delets and will i get chatter with the standard airbox

 

whats this called? if it was broke would it efect cars stalling?

 

That's the Boost Control Solenoid (BCS), which is an electronically-controlled boost bleed valve, basically.

It's plumbed in between the compressor's bleed nipple and the wastegate actuator's vac inlet nipple. It interacts with info supplied by the ECU's various I/O sensors to alter the amount of boost at any given time. So if any of the sensors indicate something's awry, the ECU can control the BCS to lower the boost duty cycle so that the engine won't grenade... Or, converesly, if the info from the sensors is all 'good', then the ECU can tell it to give max boost - either the OEM level or new mapped level (and up to the MAP sensor's limit)...

 

thats your boost solenoid... usually causes overboosting if it gets dirt inside, dont think it causes stalling though.

Gaz

 

cos the botton of it wasnt connect to my resonator, just wondered if that what coursin my car to stall.

 

That's the 3rd port bled-air vent-pipe - can either go to res box or left open in engine bay. Shouldn't affect running.

 

It can be left to vent to atmos yes but the nipple on the resonator should be blocked if you leave the pipe off other wise a tiny amount of air will be getting in un-metered by the MAF... cant seeing it being enough to cause much difference to the running but should be sealed anyway.

Gaz

 

Yes.

Some goon has plugged my res box's hole with a screw! Although I suppose it does the job just as well lol.

Res box'll soon be junked though...Will be getting a remap with a FMIC and IK and the IK includes MRT's all-metal black res del pipe with the thin entry tube for the BCS's vent pipe to attach to.

 

Hey guys, the little pipe from the bottom of the boost solenoid, if i vent to atmos i have huge over boost. Thats with the resonator box hole plugged and with the pill in the pipe. You sure its a good idea to vent?

 

But are you also saying that you DON'T get the overboosting when it's recirced back to the res box, then?

 

where is the tempure sensor located?

 

What induction kit is that you have in the pictures above... mine is strange at the min, as its pretty much straight and no 90degree bend, which means its in the way of the Front Mount pipes

 

Nige, I've found you a couple of res delete pipes currently on ebay, mate:-


A'PEXi
subaru impreza apexi alloy induction pipe hose kit on eBay (end time 08-Aug-09 11:36:28 BST)

K&N
K&N Induction Kit Subaru Impreza WRX 2.0L on eBay (end time 13-Aug-09 22:53:52 BST)

 

mbd sti2's IK is a pick and mix affair:-

Cone... standalone 80mm 90deg Samco... MRT's res del... standalone 70mm-to-58mm 90deg Samco turbo pipe (modded to fit the 2 oil breather pipes).