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Old 02-27-2012, 02:00 PM   #26
lokey
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I have the GS AOS on my car, and now I'm wondering how well it's really working. What type of clear hose/tubing would be safe to use? Could you post a link? I called Grimmspeed, and they said that they used Gates (pic on their site: http://www.grimmspeed.com/catalog/pr...roducts_id=191 ), but I can't find it on the internet anywhere! I found plenty of 1/2" and 3/4" silicone hose, but from what I understand, using silicone is a big no-no for oil and fuel. Thanks!
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Old 02-27-2012, 02:26 PM   #27
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I've always used Watts clear nylon braided hose from home depot or Lowes without ill consequence. if you want, you can get nicer stuff from Pegasus.
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Old 02-27-2012, 02:48 PM   #28
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Last edited by lokey; 02-27-2012 at 03:02 PM.
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Old 02-27-2012, 11:01 PM   #29
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I ran a similar AOS that mounted to the oil cap. I had a Cyl4 ring land failure after 2 sessions at VIR. Rebuilt engine, same AOS but added a single catch can. Cracked ring land after 1 track event (15-20% leak down in 2 cylinders). I also had to drain 1/2 quart of oil from the catch can after every session. Drove 2 more track events then Cyl1 ring land failure. Rebuild 3rd motor with forged internals with same AOS and 2 catch cans. This worked, but still had to drain 1/2 quart of oil out of the catch cans after every session. 4 events later I switched to a single Moroso AOS. 1 oz of waste oil (very liquid) after each session.

My opinion:
4) AOS which sits on top of the oil cap. The AOS on the oil cap works for WOT straight pulls (blow by) but not for high G turns (oil slosh)
3) stock PCV- better than #4
2) Moroso, Element, or Crawford system works for high G track conditions.
1) Dry sump plus #2 (Element) is what I'm soon to test!

Last edited by Si1ver&B1acK; 03-01-2012 at 10:52 AM.
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Old 02-29-2012, 04:03 AM   #30
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Element Tuning's Dry sump? That thing looks monstrous. Thanks for the review. Will be getting a Crawford AOS most likely.
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Old 02-29-2012, 04:44 PM   #31
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Yep, I will be putting Element's dry sump, AOS, and Hydra to the test very soon.
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Old 02-29-2012, 05:54 PM   #32
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Quote:
Originally Posted by lokey View Post
I have the GS AOS on my car, and now I'm wondering how well it's really working.
Same here. Keeps the I/C clean, but is everything else OK?
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Old 02-29-2012, 06:23 PM   #33
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Last time I had my intercooler off there was a decent amount of oil in there. Not something to be crazy worried about but enough to peak my interest. I'll be going with a crawford unit soon.
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Old 03-01-2012, 08:27 AM   #34
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Hey lokey and bill
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Old 03-01-2012, 07:16 PM   #35
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Hey! (just visiting) :-)
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Old 03-12-2012, 08:27 PM   #36
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grimmspeed have any updates on their second version? I already have their aos, but am now thinking about switching over.


time to do more research.
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Old 03-18-2012, 01:07 PM   #37
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interesting stuff. Would really like to see grimmspeed solve this issue because they make great stuff but the crawford AOS is on my list for now
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Old 03-19-2012, 06:47 PM   #38
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I received the PM excerpts below, here on 3/2 & 3/5. For those of us who have purchased the AOS this is not exactly want we'd want to read.

I suggested "I think it best if you were to mention the high G cornering issue in the description of the AOS on your web site".

As of 3/19 they have not.

On 3/2:

"There are some issue with the aos but over all it's benefits out weigh the cons, at least in our eyes. We find that the aos is perfectly suited for a DD that's looking to get the most out of the motor. This may not, however, be the case for a car that sees a lot of high g cornering or track days. Oil is able to go back up the oil fill tube and over run the aos with oil. We are working on a revision that will be better suited for the track but don't have any updates or release dates as of yet. People who have run this strictly on a daily driver have had amazing results!"

The I/C on my WRX is indeed oil free since the addition of the AOS, so for a DD it works as stated.

On 3/5:

"I auto crossed my old wrx with our aos and didn't run into any issues. The big problem seems to be on long sweeping corners where the oil has an extended period of time to ride of the walls. If you're at all concerned you could run a back up catch can on the return line or remove it for the event".

Back up catch can? Lots of long sweepers where I have autox'd in the past.
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Old 03-19-2012, 06:59 PM   #39
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I was tired of being embarrassed puffing smokes at start up leaving car meets. People laugh. I'm all for grimmspeed stuff and they have the best customer service but unfortunately this product wasn't acceptable to me. Purchased a crawford unit and have had zero issues. No more pointing and laughing.


If anyone is interested in buying my grimmspeed let me know. The basic hoses are gone since I didn't wanna run my lines over everything.
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Old 03-19-2012, 07:06 PM   #40
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random question- for those running the crawford, do you NEED to remove the cruise control thingy on the passenger side strut tower to use the crawford unit?
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Old 03-20-2012, 06:45 PM   #41
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Quote:
Originally Posted by shadowpr View Post
grimmspeed have any updates on their second version? I already have their aos, but am now thinking about switching over.
I'll more than likely be going for the crawford when I build the engine. I have the GS right now
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Old 03-21-2012, 12:49 AM   #42
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just wanna put my 2 cents into this thread

first off i dont have any first hand experience with the grimmspeed. one of my friends has a prova aos similar to the grimspeed on his sti and a crawford on his race car.

my car was smoking on startup pretty bad. after the car misbehaving (low on boost) one night i drove the car pretty hard for about 30 minutes to data log it and to try to find consistency.

the next morning it smoked for 10 minutes before it stopped and i was freaking out. the engine builder told me nothing was wrong with the motor and to get an aos (i didnt even have a catch can) but to stay away from the oil cap style as it probably would be insufficent for my power level (430 on 91)

i purchased the crawford timc aos even though i have a front mount because the gimick/ebay/txs piping comes very close to the firewall in the middle.

the install went perfect. it was self explanatory without detailed instructions and came with nearly everything. the only thing that could have been better was if the inlet nipple cap was smaller but we made it work. some people may prefer instructions and those can be found online.

since ive had it on the car has not smoked once. ive beaten the hell out of it daily since i got it just to make sure to put as much potential stress on it as possible. i took alot of oil out of my piping and intercooler so its possible that it could take time to build up to the point that it smokes everywhere but i seriously doubt it.

im going to a track day on saturday and im more excited to start my car the day after than i am to go to the track day. just to see if it will smoke after being beaten for 2+ hours.

ill also be checking if oil consumption goes down.
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Old 03-23-2012, 06:21 PM   #43
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Quote:
Originally Posted by Supraru View Post


I was tired of being embarrassed puffing smokes at start up leaving car meets. People laugh. I'm all for grimmspeed stuff and they have the best customer service but unfortunately this product wasn't acceptable to me. Purchased a crawford unit and have had zero issues. No more pointing and laughing.


If anyone is interested in buying my grimmspeed let me know. The basic hoses are gone since I didn't wanna run my lines over everything.
how was it switching over? was it complicated? (I can't remmber what i did when i installed the gs one)


Quote:
Originally Posted by azn2nr View Post
just wanna put my 2 cents into this thread

first off i dont have any first hand experience with the grimmspeed. one of my friends has a prova aos similar to the grimspeed on his sti and a crawford on his race car.

my car was smoking on startup pretty bad. after the car misbehaving (low on boost) one night i drove the car pretty hard for about 30 minutes to data log it and to try to find consistency.

the next morning it smoked for 10 minutes before it stopped and i was freaking out. the engine builder told me nothing was wrong with the motor and to get an aos (i didnt even have a catch can) but to stay away from the oil cap style as it probably would be insufficent for my power level (430 on 91)

i purchased the crawford timc aos even though i have a front mount because the gimick/ebay/txs piping comes very close to the firewall in the middle.

the install went perfect. it was self explanatory without detailed instructions and came with nearly everything. the only thing that could have been better was if the inlet nipple cap was smaller but we made it work. some people may prefer instructions and those can be found online.

since ive had it on the car has not smoked once. ive beaten the hell out of it daily since i got it just to make sure to put as much potential stress on it as possible. i took alot of oil out of my piping and intercooler so its possible that it could take time to build up to the point that it smokes everywhere but i seriously doubt it.

im going to a track day on saturday and im more excited to start my car the day after than i am to go to the track day. just to see if it will smoke after being beaten for 2+ hours.

ill also be checking if oil consumption goes down.
please keep us updated
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Old 03-23-2012, 06:29 PM   #44
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Quote:
Originally Posted by shadowpr View Post
how was it switching over? was it complicated? (I can't remmber what i did when i installed the gs one)




please keep us updated
There was just a tiny bit of a challenge since I had my gs lines run behind and under my top mount so it didn't look like a bunch of hoses over my intake manifold. Had to get them out first. Then since I didn't have any pcv stuff anyway I had to come up with a couple different hoses to make it work and run the way I wanted. At some point I'll probably get some more hose and run it more cleanly but I was just trying to bang out the job quickly and correctly after work one day.
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Old 03-24-2012, 09:33 AM   #45
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Quote:
Originally Posted by Supraru View Post
There was just a tiny bit of a challenge since I had my gs lines run behind and under my top mount so it didn't look like a bunch of hoses over my intake manifold. Had to get them out first. Then since I didn't have any pcv stuff anyway I had to come up with a couple different hoses to make it work and run the way I wanted. At some point I'll probably get some more hose and run it more cleanly but I was just trying to bang out the job quickly and correctly after work one day.
do you have any pics? It might be helpful for guys like me that will be changing setups.
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Old 03-25-2012, 08:43 AM   #46
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Quote:
Originally Posted by shadowpr View Post
do you have any pics? It might be helpful for guys like me that will be changing setups.
The downloaded instructions were extremely easy to follow and if you still get confused there's an install vid on youtube that's nice to watch before as well.
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Old 03-28-2012, 01:53 AM   #47
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update: track day done. almost no consumption at the track at all. no smoking the next day either. car is running smooth as silk.
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Old 04-01-2012, 06:45 PM   #48
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Unhappy just bought the grimmspeed AOS

Just bought the grimmspeed aos for my dd. I dont ever autox im thinking ill go with the clear hose. test it out . maybe return it.
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Old 04-13-2012, 05:09 PM   #49
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I just ordered the Crawford. I want to get a track day in this season and a few autox events as well. I've lost confidence in the GS for that.
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Old 04-13-2012, 06:17 PM   #50
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I wouldn't go that far. They still make good stuff, this just wasn't what I needed for my car. Plus their customer service is second to none.
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