Well, yeah, that's backwards, but I assume you've already fixed it, right? I mean, in my explanation, I told you that if it looked like this, then it was backwards. Did you read what I wrote or what?

 

Yeah it sounds cool until something breaks.

I've installed it that way a couple of times, forgetting how the manual has it. Sounds evil, but driveability kinda sucked. Correct way is smooth...... so nice.

 

then tell me y other turbo cars run it this way using the same exact type of valve

 

I dont see how the world is a better place because of your contribution. All you couldve said is "Next time, do a search because there were many threads on this topic." Now take your tylenol.

 

Different cars, different boost, different BOV. This is not the proper way to do it on the Evo. I don't care what other cars do.

 

seriously dude... do what you like to your car! you pay for it... your call.

Most people here are just giving their advice on what the service manual shows, how the engineers and designers made it to work for the Evo and what people have experienced. The original poster can do what he wants from that point. And if you still feel the same... do what other turbo cars have done. No hating... just looking out for the newbs.

 

Oh I knew I should have kept my hands in my pockets...

Yes, turbo, or boosted, air flows out. But it is not the same. These are spring loaded. Like Warrtalon said its proper operation.

In the incorrect setup the boosted air will be pushing with the sping to close the valve, the vacuum its not as strong as the amount of boosted air pushing agianst it, and it will cause surge. In the correct setup the air is pushing agianst the spring and the spring is getting vacuum assist to take the tension off of it.

As far as other cars, i.e. totally different cars, cant compare to ours. Dont forget most turbo cars like 1.8T VW dont run 20-22 psi. Perhaps at 6-8 psi the vacuum is stronger than the boosted pushing the spring, but that should be tested.

 

as long as the spring pressure is great enough there should be no surging. and my golf 1.8t runs 20 psi all the way to redline.

 

Do you mean vacuum pressure? I was trying to explain that if the spring is strong and the boost is high, then the vacuum would not open the valve.

Regardless, its not my car. Do as you wish.

 

Yeha fixed it. i just wanted to make sure what it looks like so i dont ever run into this problem again. Im kinda mad becuase i brought it from the dealership used and $hit like this happens. Oh well.

 

listen i do get what u say now, that if the vacume pressure is not greater than the boost the valve wont open. all i know is that i have contacted forge about this one and they said either way will work. also when evom installed it on there project car this is what was said.

Now, insert the Forge valve in place of the stock unit. There is some debate as to which end goes in which section. Our own experience led us to follow the same positioning as the stock BOV. When we installed the valve in the opposite orientation, we experienced a strange sqeaking sound from the valve. Forge Motorsport mentioned that either way can work and comes down to personal preference. We recommend trying both orientations to see which works best. Once securely in place, tighten the fasteners using a socket wrench and/or phillips head screwdriver. We noticed the stock vacuum hose can get pinched, so we recommend purchasing a longer tube from a local hardware store and replacing the stock piece to prevent any potential issues that may arise.


so wht i am going to do when i go home is put the valve in the stock way and i will tell u tomorrow if there is a difference at all.

 

First - sorry for hijacking the tread...

Secondly - Its up to you what you wish to do with you DV. You can see that there is quite a lot of debate over this subject.

Deadbeatrec - I am interested in your testing and that you get out of it. Please PM me with what you find by switching it around. But I think we are getting off topic from the original post - he just wanted to know if it was in correctly. I think we all accomplished that.

 

Its fine and done. conutine on with this subject. i want to know as well.

 

Are you kidding? Have you looked at my signature? Do you know how many times I would have had to do that? What's the fun? Wouldn't it be more fun to just flame some FNG instead?

 

sounds like $hit