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Old 08-15-2011, 08:44 PM   #16
Scooby Specialist
Member#: 260868
Join Date: Oct 2010
Chapter/Region: South East
Location: Lake Worth, Florida
2011 STI


January 12'

Installed my Crawford V2 AOS. Took about 3 hours. I thought it would be faster since I did do half the work yesterday but then returned everything back to OEM since I got stuck. The Dom is really tight to the intake manifold and makes getting the crank case breather hoses out and back in real difficult. The hoses from the AOS are really thick and make putting everything back together difficult as well but it can be done. The pipe from the bottom of the AOS to the crank case is slightly shorter than what is seen in the install instructions and videos but does work. Also, being a newbie like me i did not know coolant would shoot out of the coolant reservoir to turbo hose when I removed it to reroute it to the AOS. I had to go get more coolant because i lost so much of it.

Also, if anyone has the Perrin inlet hose, you need to get a 5/8"x1/2" coupler. The vent hose from the AOS to the inlet hose comes in 5/8" size. The perrin nipple is 1/2". This was my last connection and I couldn't believe I didn't see this.




February 12'

Finally did the FPR and Dampener swap. Got the 05' STI FPR and 07 Dampeners from Bertune. Thanks Bertune!

05' FPR and Dampener:

I pulled the fuel pump fuse. Started the car till it died. Cranked it several times more. Took off the gas cap and then disconnected the negative terminal on the battery. Unfortunately I did not crank the car enough because when I pulled off one of the hoses off the supply hose a stream of gas shot out and sprayed my whole counter in my garage. I was able to cover it up before it could spill into the engine bay. I had protective glasses on as well. It was good to be prepared. I wrapped everything with a towel before pulling it apart and still had gas pour out. Not horrrible though.

11' FPR and Dampeners out:

I have a guess, no backing for it though, that the balancer hose between the supply and return dampers may be one of the reasons for the hesitation issues.

Install was pretty simple. No need to cut the existing hoses. Just used a hose that came with one of the dampeners to connect the FPR to the dampener.


Car is running. Got a new map from Phatron with fuel compensation (I thinK) zero'd out. Going to do some casual driving and a few pulls for him to check on. Hopefully the hesitation will be gone.

Time to do the swap was about 1 hour.

Purchased Aquamist HSF-3

Purchased Howerton Engineering 2 Tank System

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Last edited by jockeygolfs; 08-23-2012 at 05:44 AM.
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