The infamous IRIS Valve

Johnybeas · #1 11-24-2008, 08:17 PM

Is it needed? Is it beneficial to remove? Will the car run without it on the stock ECU??? Please explain to me why so many people remove it...

sicksubie · #2 11-24-2008, 09:19 PM

I dont know of anyone who has removed their IRIS valve....

svxpert · #3 11-24-2008, 10:24 PM

<<I dont know of anyone who has removed their IRIS valve....>>

+1 here. never heard of that...

subbieatnz · #4 11-24-2008, 10:39 PM

What is the IRIS valve, what does it do? and what does it look like?

Johnybeas · #5 11-25-2008, 12:01 AM

There was mention of messing with it in rally bob's build and nevin wanted me to ship my intake manifold to him without it as a core for him to send me his polished intake manifold, I've not heard back from him yet as to if he runs his without it or why he removed his

So that is why I was curious, because I'd seen it a few other places around. I'll do some searching and post some links so it'll be more clear. I'm just really confused what it is and why people are messing with it.

PS: Bobby did you get my voicemail I left ya? I misplaced your paypal addy to send ya the cash for the radio cage, also still wondering if you found that visor and how much you wanted for it. let me know.

Johnybeas · #6 11-25-2008, 12:08 AM

Quote:

Originally Posted by RallyBob

It's removed completely from the intake.

http://www.subaru-svx.net/forum/show...+Valve&page=14

I'm confused... what is it... what is it used for... and why did they remove it, and why did nevin remove his....

b3lha · #7 11-25-2008, 03:24 AM

I've been trying to find the part of the ECU that controls it to experiment whether there is any benefit to opening/closing it at a different rpm than stock. But I haven't managed to find it yet.

As I understand it, with the iris closed, you get more power at low rpm. With it open, you get more power at high rpm. I can't imagine it would be benefical to remove it unless you were doing other mods to the intake system.

degeso · #8 12-08-2008, 07:27 AM

people remove it because they are lazy or cheap its there for a reason usally what happens is that it gets so dry it snaps in half. mine did that its a 20 dollar part without it the engine is rough. i have 185000 miles on my ***** and cant even feel if the engine is running at a stop light. its worth fixing little things like that especlly that easy to fix

want-a-fast-svx · #9 12-08-2008, 08:33 AM

Quote:

Originally Posted by degeso

people remove it because they are lazy or cheap its there for a reason usally what happens is that it gets so dry it snaps in half. mine did that its a 20 dollar part without it the engine is rough. i have 185000 miles on my ***** and cant even feel if the engine is running at a stop light. its worth fixing little things like that especlly that easy to fix

I believe you are referring the the little check valve behind the p/s pump? Where as the others are talking about the butterfly in the center of the manifold. I could be wrong but thats what i am getting out of it.