integroid

I used them a long time ago but I actually called to place my order. Have you tried to call them?

http://www.trademotion.com/storefront/index.cfm?action=contactus&siteid=214725

I got the STI brake booster hose yesterday and cut out the check valve. It is approximately 3/4" long and tightly fits into the hose. There is a rounded top like a bullet that points towards the intake manifold and a flat base which points towards the brake booster. I could not get the check valve to slide into my old hose so I put it back in part of the STI hose and got a 3/8" x 3/8" barb connector (nylon) and tied the two sections together. I used Silicone spray and heated up the old hose, but still couldn't get in there. I would rec. just cutting the old and new hoses and splicing them together to avoid a lot of headaches trying to get that damn valve in there without destroying it (it is thin plastic.)

 

On an aside, I bled the two brake lines that come out of the MC. However, I didn't bleed the bleeders on the 4 calipers, anyone think this would be necessary too?? Seems fine without bleeding them but perhaps someone else knows something I don't know. I also cycled the ABS a few times, pedal remains firm throughout.

Yeah, I used a very small socket driver so I was only pushing on the outside of the check valve. It took me about 5 minutes but I got it in past the first 90 degree on the hose closest to the booster. I didnt feel like going to the store to buy the barbs so that is the only reason why I pushed mine through the hose instead of just cutting and splicing.

I found out today what happens without a check valve in place after the STI swap. If you go from a boost situation, even minimal boost, to pushing the brake pedal, there is a delay of probably a 1/2 second where there is no brake action at all, not good. If you drive w/o boost, it works normally. Fortunately my STI hose will be coming in tomorrow. You can't safely complete this swap without the STI brake booster vacuum hose.

It is much worse making a 3rd gear run at ~25 psi of boost coming up to traffic. I think the passenger needed new drawers:lol:

So you bought the STi hose, cut out the check valve, then shoved it into the LGT hose from the booster side?

 

The stock hose doesn't have a check valve?

Correct and correct. The check valve is built into the booster on the legacy.

Integroid- I am still waiting on the STI brake booster hose so I can harvest the check valve. Any dangers in driving without the check valve in place?? What part of the stock Legacy brake booster hose did you insert the check valve?? TIA- Jeff.

I drove my car for about 3 days without the check valve. Just be very careful when you are coming off boost and pressing the brakes. You will not have brakes for a split second after coming off boost. The pedal will also feel a little weird from not having the check valve. I started inserting the valve on the side of the booster and pushed it passed the first right angle on the straight portion of the hose. Make sure you put it in the correct direction because it would be next to impossible to get it out without cutting the hose.

Looks like it is only $13.77 online at subarupartspro.com

I think I paid $18 for mine

Got my MC and BB from a 2005 STI in the mail yesterday. I'm leery to install until this check valve issue is straightened out. Is is correct that the Legacy GT brake booster vacuum hose doesn't have a check valve b/c it is built into the stock brake booster? I am having trouble finding the STI hose w/ the check valve in it. A part number would be very helpful to a lot of us. Thanks in advance.

all you need is the hose that goes from the booster to the intake manifolf from a wrx or sti. they both have the check valve in them. I will get the part number next week

Looks like rain all weekend so I might not be able to get to run this weekend:(

I dont have the part number of the hose on me. I will try and get it this weekend.

Can you just reuse the STI hose or do you have to cut out the valve and add it to the legacy gt hose ?

No, because the LGT hose is 4X the length as the STi hose. They enter into the Intake manifold in diferent spots. Your choices would be to get the check valve out of the STi hose and inserting it into the Legacy hose or cutiing a section of the STi hose with the check valve and cutting the legacy hose and using a hose connector to connect the two.

You car is insane, 580WHP!!! Is it your daily driver? If so what kind of mileage you get (considering if you can keep your foot out of it). I need to look up your mods, I bet you are not even on a stock block are you?

I need to start planning and saving what I want to do with my 08 LGT but fear the 5EAT will not last. I would be happy getting to 320-350HP until I got there and said nope still not enough.... LOL .

It makes more now;) I will update my other thread after I run it down the track this weekend. E85 and 1.85 bar on the street = HORRIBLE gas mileage. Should be running 2.2 bar this weekend. I dont think there is anything left stock on my motor other than the outer case halves. Yes I daily drive it or at least drive it 75% of the time but I do have another beater that I drive around as well.

It's odd that I find this thread. I too thought that the brakes are way to soft for such a sporty car as the LGT. I came from a 05 Corolla that Integriod mentions and yes the brakes were good on it. Even the wifes Accord felt like it had better brakes.

Does anyone know for sure if this will work on a 08? At less than $70 it well worth money (cheaper than pad/rotor upgrade).

I dont see why it wouldn't. The firewall is the same on all 05-09 Legacys.

Yikes! Thanks for the heads-up.

So you had no power assist?!

Did you buy your mc/booster new? Seems odd they wouldn't build it the same way for for all models- different sizes, sure, but w/o check valve?

I got it used but they are different parts completely. One being from a 2002+ Imprezza to one for a newer generation Legacy.

Actually running boost into the booster will give you the opposite effect of having the power booster. It actually presses the pedal all the way out and you cannot press it down until it goes back into vacuum.