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08-26-2017, 07:53 PM | #1 | ||||||||||||||
Scooby Newbie
Member#: 254317
Join Date: Aug 2010
Location: Toronto, Canada
Vehicle:2011 STi |
Crawford V3 AOS - Q&A
I was asking a bunch of questions about the Crawford V3 AOS in the wrong sub-forum and the fine people at Crawford was very responsive to provide the answers so here they are so others use as reference
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Btw, if you hadn't notice Crawford is running a group buy for upto 30%...
* Registered users of the site do not see these ads.
Last edited by lowbee; 08-26-2017 at 07:58 PM. |
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08-26-2017, 09:35 PM | #2 | |
Scooby Newbie
Member#: 254317
Join Date: Aug 2010
Location: Toronto, Canada
Vehicle:2011 STi |
Quote:
I am having a hard time choosing between the V2 and V3 AOS..... I like that the V2 have connections to the rocker breather ports where it offers some protection should the rocker vents decide to blow out oil vapor, I also like the idea of getting rid of the PCV but V2 lacks the more effective "dual chambers" design. I like that the V3 is much simpler to install and mounted where heated coolant lines are not necessary but V3 lacks connections to the rocker breather ports which I am seeing oil vapor in the tube now....I don't believe I have an old and tired engine. There has to be an easier way to choose between V2 & V3 based on usage, for example, tracking or daily driven, icy cold weather, smog test, etc... Both are of the same price don't help either Any help Crawford ? or anyone ? |
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08-26-2017, 11:05 PM | #3 | |
Former Vendor
Member#: 42075
Join Date: Aug 2003
Chapter/Region:
SCIC
Location: Ontario Ca.
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AS for your V2 or V3 dilemma... On my street driven car I choose the V3 and on my dedicated track car I choose the V2. Let me make it easier on you, go with our V3 and run it for 6 months. If you are seeing oil in the valve cover breather lines instead of the fine coating you have now then I will be happy to take the V3 back and send you a new V2. Quirt C |
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08-27-2017, 01:50 AM | #4 | |
Scooby Newbie
Member#: 254317
Join Date: Aug 2010
Location: Toronto, Canada
Vehicle:2011 STi |
Quote:
OK, so V3 it is..... Is there a need to relocate/move/bend the large wiring harness mounted next to the strut tower anymore ? - |
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08-27-2017, 10:42 AM | #5 | |
Former Vendor
Member#: 42075
Join Date: Aug 2003
Chapter/Region:
SCIC
Location: Ontario Ca.
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Quote:
With our V3 there is no need to relocate anything, it is a tight fit though! Mounting the AOS to the engine makes everything so much better and cleaner. QC |
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08-27-2017, 01:11 PM | #6 |
Scooby Newbie
Member#: 211614
Join Date: May 2009
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Thank you to lowbee for your excellent questions regarding the v3 AOS. And thank you to Quirt C. for answering the questions. I have signed up to get the v3 AOS as part of the group-buy (sort of spontaneous), and I had similar questions as lowbee. I had run the Perrin AOS for 4 months, and Moroso dual catch can setup on my stage 2 WRX for roughly 18 months. My switch to the catch cans was ultimately driven by by my desire to actually see what was coming out of the engine. Repeatedly, the rocker-cover can presented almost nothing, and sometimes just a few drips of water. While the crank-vent always produced a gush of chocolate milk (oil-water mixture). I see now from your explanation why that is! I had pre-conceived that the rocker-covers would be venting to the inlet hose, and it's really exciting to know that it had always been working in reverse! This answers so many questions for me! Thank you to Quirt for being active in the subaru community , and answering our questions! I am very excited to get that V3 AOS installed now!
Last edited by FamousAmos; 08-27-2017 at 06:17 PM. |
08-27-2017, 01:34 PM | #7 | |
Former Vendor
Member#: 42075
Join Date: Aug 2003
Chapter/Region:
SCIC
Location: Ontario Ca.
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Quote:
QC |
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08-28-2017, 12:23 AM | #8 |
Scooby Specialist
Member#: 247823
Join Date: May 2010
Chapter/Region:
BAIC
Location: Denver/ Eglin AFB
Vehicle:2007 STi limited SWP |
I'd love to get on board for a V3 for my 2004 FXT but I believe I'd need the 02-07 GD fitment for a TMIC. Is there any way I can get the group buy pricing, but wait until it is released?
Unless you think a V2 is better...I have an IAG Stage 1 block currently, but I am still running my stock turbo and don't have plans to make big power anytime soon. It's my daily and it happened to crack a ringland which spurred the motor build. |
08-28-2017, 09:41 AM | #9 |
Scooby Specialist
Member#: 11356
Join Date: Oct 2001
Chapter/Region:
MWSOC
Location: Cottage Grove, MN
Vehicle:2012 WRX STi Hatch DGM |
Looking at Rally Sports website...I can't tell if they have V2 or V3? And on fastwrx.com it says it is V2, so where do I get the V3?
And is there a Group Buy right now? |
08-28-2017, 10:46 AM | #10 | |
Former Vendor
Member#: 42075
Join Date: Aug 2003
Chapter/Region:
SCIC
Location: Ontario Ca.
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Quote:
QC |
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08-28-2017, 10:50 AM | #11 | |
Former Vendor
Member#: 42075
Join Date: Aug 2003
Chapter/Region:
SCIC
Location: Ontario Ca.
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Quote:
And FWIW, RS sells our V3 as well. QC |
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10-05-2017, 10:51 AM | #12 |
Scooby Specialist
Member#: 468117
Join Date: May 2017
Chapter/Region:
SCIC
Location: Southern Cali
Vehicle:2017 WRX DMG |
here are a pics of the clamps that came with the AOS, are they really that bad??
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10-05-2017, 11:54 AM | #13 |
Scooby Specialist
Member#: 375462
Join Date: Dec 2013
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Location: Portland, OR
Vehicle:2006 Impreza WRX STI WR Blue |
For me, clamps of that size boil down to preference:
Spring clamps are nice and easy to install/remove, but they lose some tension over time. Worm gear clamps (pictured) are very secure, but slow to install/remove, and eventually they will deform and jump teeth. Subaru used worm gear clamps with grooves instead of ladder rungs on a few oil lines in a few years; they're a little better, but if you don't plan to remove/install often, I recommend Oetiker clamps (below) on semi-permanent lines and spring clamps on the ones you plan to remove once in a while. The clamping tool is about 20 bucks and I guarantee you'll get enough mileage to make it worthwhile after you get used to using the clamps. |
10-05-2017, 12:51 PM | #14 |
Scooby Newbie
Member#: 467853
Join Date: May 2017
Location: San Antonio, TX
Vehicle:2018 STI ISM |
So on that picture above with those two hoses circled. Does anyone have an 18' STI? My AOS should be coming today from Crawford but looking at my clamps they are smooth all around? WTH
Are those true one-time use clamps and does anyone else with an '18 know what i'm talking about? I plan on sticking a flathead in there to see if I can bend it to see if they break or come off. |
10-05-2017, 01:56 PM | #15 | |
Scooby Specialist
Member#: 247823
Join Date: May 2010
Chapter/Region:
BAIC
Location: Denver/ Eglin AFB
Vehicle:2007 STi limited SWP |
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10-05-2017, 02:10 PM | #16 |
Scooby Newbie
Member#: 467853
Join Date: May 2017
Location: San Antonio, TX
Vehicle:2018 STI ISM |
Thanks Pigboat!!
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10-14-2017, 04:00 PM | #17 |
Scooby Newbie
Member#: 254317
Join Date: Aug 2010
Location: Toronto, Canada
Vehicle:2011 STi |
Ok so I got my Crawford V3 today and opened the box.... upon examination I notice the "mounting arm" has a slight bend to the right towards the bottom (the arm is not a flat piece of metal) and I am assuming that it is designed that way and the bend is not damage from shipping. Can anyone with a V3 or Crawford confirm that ?
Btw, what are the 2 (1 small, 1 big) plastic caps for ? - |
10-15-2017, 12:37 AM | #18 |
Scooby Newbie
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Join Date: Aug 2012
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Vehicle:2012 WRX Limited OBP |
If you're referring to the bend on the vertical axis, yes that's supposed to be there
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10-21-2017, 06:27 PM | #19 |
Scooby Newbie
Member#: 254317
Join Date: Aug 2010
Location: Toronto, Canada
Vehicle:2011 STi |
I am glad I haven't seen any horrible installation experience documented here on the V3 yet....
Looking forward to have mine installed shortly.... |
10-26-2017, 07:13 PM | #20 | |
Former Vendor
Member#: 42075
Join Date: Aug 2003
Chapter/Region:
SCIC
Location: Ontario Ca.
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Quote:
And the bend in the bracket gives it more strength so it was planned that way Thanks for choosing Crawford |
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11-08-2017, 04:45 PM | #21 |
Scooby Newbie
Member#: 254317
Join Date: Aug 2010
Location: Toronto, Canada
Vehicle:2011 STi |
I wish Crawford would offer the option of shipping the AOS with flex clear oil rated tubing like these http://www.jgbhose.com/Data_Returns/...=1010980&id=39
So I can be reassured visually from time to time that none of the lines are plugged..... I would order them myself but I don't need 100 feet of this stuff |
11-10-2017, 10:44 PM | #22 |
*** Banned ***
Member#: 462387
Join Date: Feb 2017
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Hi Crawford -
I have a 2016 STI car with the DOM1.5 XTR, FF System, FMIC, ETS TBE, ETS CAI, 1000 injectors, fuel pump etc. and the competition series IAG AOS. This tune has been running just fine for the last ~8000 miles. Recently I went for an oil change at Christian Brothers, a local reputable mechanic shop. They do not perform any tuning work on the car and is my go to place for a basic oil change and tire rotations. This is the second time they have performed an oil change on the car. As they do not carry the Motul brand, I purchase the oil online and take it to the shop when having the oil changed. For oil change, I use Motul 8100 5w40 and have only used this oil since the tune had been performed on the car and as it is recommended by my tuner. Oh and the blue Subaru oil filter. Yesterday while driving (some spirited driving) I noticed light smoke coming out from under my car. No smell / light smell. This is definitely not normal so I take the car back to Christian Brothers, we have it lifted and notice that most of the underbody of the car as well as the rear bumper has signs of oil spray. More on the underbody of the car than than the bumper. It seemed that most of the underbody was covered in oil. The oil on the underbody of the vehicle is heating up causing the smoke to come from the sides of vehicle. Easily noticeable when the vehicle is at a stop. We checked the oil level on the car and noticed that it was very low. I've only driven the car 200 miles since the oil change. And prior to this I've never had problem with blow by oil and oil has never gone low. We proceed to add more oil to get it a safe level. I'll be taking the car to my tuner, already have an appointment made. Other than that I do not have any CEL or other problem. But I'd like to understand why all of a sudden I have a lot of blow by oil coming out of the hose from the AOS going to the under body of the car. Looking for help from Crawford or other forum members who can add any insight or experience. The engine bay looks dry and I didn't see any loose hoses or leaks from the hoses connected to the IAG AOS. Exit point for the oil seems to be the hose leading out to the underbody of the vehicle. Could it be that: 1. Something (e.g. a hose) has come loose? (I couldn't find one) 2. The wrong oil was used during the oil change - and not the one I provided? 3. I should try a different heavy oil? 4. ??? Any help, insight is appreciated. Thanks! |
11-27-2017, 06:05 PM | #23 | |
Former Vendor
Member#: 42075
Join Date: Aug 2003
Chapter/Region:
SCIC
Location: Ontario Ca.
|
Quote:
1 Your motor is damaged and the AOS cannot handle the volume of blow by so it is coming out the vent hose. 2 Your motor is fine but the AOS cannot handle the volume of blow by so its coming out of the vent hose. 3 The oil is not draining out of the AOS. |
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12-08-2017, 01:49 PM | #24 |
Scooby Newbie
Member#: 254317
Join Date: Aug 2010
Location: Toronto, Canada
Vehicle:2011 STi |
Got the V3 installed in my GR finally and everything works like it is supposed to. Now, what are some good inspections (things) to do regularly to ensure the AOS is working properly ?
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12-09-2017, 12:21 AM | #25 | |
Scooby Specialist
Member#: 468393
Join Date: May 2017
Location: PDX OREGON
Vehicle:2017 STI |
Quote:
Have you taken any high speed corners, sharp or long and sweeping? I'm on my phone so can't type a lot but had a similar issue recently. 1/2 Quart came out head cover to my vta under car. Took it for a compression and leak down test and it came out under 10% spread and leak down 8% max. I had just taken a long sweeping turn at 120 mph.... And that's the side the oil came out. It was also under pressure. |
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