Paulshy

Hi there I new to the site I have a 2003 impreza wrx silver with pro drive back box,
I have bought a dump valve for the car and could someone please tell me what size of blank plug I need.

rb5 stu

Oh no.

Paulshy

Why oh no ??

hooley scoob

FuZzBoM

I think it is generally felt dump valves are a bit tacky and pointless. They do nothing for power increase and if anything can lose you power if it is a cheap poorly made one.
Personally I think they are a bit retro and 80's/90's now days and wouldn't fit one. Each to their own though.

Taken From Duncan at Race Dynamix
– a vent to atmosphere dump valve will not improve the performance but if you must fit one for the sound then stick to a good make – forge have always been good from what I have seen. (Baileys are less so)

http://www.racedynamix.co.uk/remap/s...ewage-2-0-wrx/

Good luck

Paulshy

Good man thanks for the reply maybe I'm the retro type then!! I'll fit and give it a go,at least the noise will **** the wife off!!!!
Any idea of the blank plug size for my car.
Cheers Paul

FuZzBoM

From memory I recall 25mm for some reason.. not 100% on that though.
I would suggest pulling the pipe off and trying to measure it with a vernier caliper if possible?
I can measure on mine but I have a Hawkeye WRX and not sure if the pipe is the same diameter as yours.

Paulshy

Good man thanx for the reply

360ste

iTrader: (1)

If keeping the Mass Air Flow (MAF) sensor which is located on the outlet of the airbox you are better sticking with a recirculating ONLY DV otherwise the fuelling will go to pot eventually killing the engine!

FuZzBoM

these guys seem reasonably priced and many various colours
http://www.autosiliconehoses.com/sil...ing-plugs.html

birchy2010

iTrader: (12)

Im using a couple of these ones ^^^^ in different places on mine. Good quality although the print comes off the end. Just give the hose ends a quick measurement