EVO Blow off valve

[Pikachu]

i am gonna purchase one next week but i like both, if i can afford to get 2 i'd buy both of them, but i can only get one for now, can IA just vote and by the end of next week i'll buy the one that wins...cuz i cant choose i love both

thanx IA

oh BTW im not a mechanic or anything so whats the process of changing the BOV, is it just a direct replacement of the stock one or is there any special modification you have to do....thanx..reps will be given for any kind of help

http://img.photobucket.com/albums/v506/wrx_newbie/greddy_type_rs.jpg

http://i198.photobucket.com/albums/aa307/pxhoang0408/DSC00427-1.jpg

[4g63ninja]

Changing the BOV is pretty straight forward. Just unscrew the hose clamps, take the old bov off, put new on on, tighten hose clamps. But one thing about those BOV's, not sure if you are aware of this yet or not, but when running a BOV that vents to atmosphere you will encounter drivability issues. The reason for this is because the BOV will vent air that has been accounted for by the mass airflow sensor, which can cause some stalling issues. So you will want to get one that recirculates air. I believe that HKS sells a recirculation kit for their SSQV. Forge makes a couple of nice BOV as well that are set up to recirculate.

[mocha latte cupcake]

recirc is a nice feature for sure, but having had both i enjoy my RS alot more :D

[r0bb86]

just keep the stocker and spend the cash on some other mods!

[Paree4g63]

Only get recirculating blow off valves or diverter blow off valves. The HKS SSQ2 is ok as long as you recirculate it. Best blow off valve for the Evo is the JDM MR DV or Forge DV. I heard Tial 50mm was good too. As long as its recirculating or diverting; its ok. If not, you will encounter stalling issues when you're slowing down to a stop & your rpms will flutter below zero when your car has gone under some pressure like going up a hill or struggling to accelerate after you let go of the pedal. Same thing will happen also if you put a BLOW OFF VALVE backwards, so be aware. Most recirculating kits will make you relocate your wires and hoses. They should all have instructions, if not, take it to a pro(topspeed). I know the jdm mr dv holds efficiency up to 25psi.. Not sure about the others. I heard tials up around 30psi max. Stock U.S evo blow off valves are plastic and don't hold boost efficiency well(only about 14ibs). Only point in getting a aftermarket blow off valve is either because your modding quite a bit or you are going to raise the boost. My 2cents bro;) A cone filter or intake kit will help your turbo spool up some and also you can hear it more noticeably and can be aware if you are spooling too much or not spooling if you don't have a boost gauge.

[vtecdude93]

hks is that i voted for

[Motivation]

why would you buy both of them if you had the money?

[EM1toEVO]

Stick with the stock Evo IX metal bov. It is fine up to 25psi. Anything beyond that, you might need to get a stronger one. I like the aftermarket bov's too, but don't get one just for the sound. Waste of money IMHO.

[cactusEG]

SARD R2D2

[sabastian458]

STOP!!! You own an Evo I assume? DO NOT BUY EITHER!!! Stick with an Evo9 MR diverter valve. You will loose power and drivability if you go with 1 of the others.

[sabastian458]

Stick with the stock Evo IX metal bov. It is fine up to 25psi. Anything beyond that, you might need to get a stronger one. I like the aftermarket bov's too, but don't get one just for the sound. Waste of money IMHO.

you can do what is call the "Gus" mod to the valve and have it hold better

http://forums.evolutionm.net/showthread.php?t=260029

[WickedIXMR]

STOP!!! You own an Evo I assume? DO NOT BUY EITHER!!! Stick with an Evo9 MR diverter valve. You will loose power and drivability if you go with 1 of the others.
Can you please tell me how the fu.ck getting one of those valves makes you lose power?