grimmspeed AOS vs crawford AOS - review - Page 2

lokey · 02-27-2012, 02:00 PM

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!

* Registered users of the site do not see these ads.

monkiboy · 02-27-2012, 02:26 PM

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.

lokey · 02-27-2012, 02:48 PM

Thank you. Like this one? -

Amazon.com: Braid Reinforced PVC Tubing, 1/2" 25' Length: Industrial & Scientific

My only concern: It's only rated to handle 175 degrees F.

Si1ver&B1acK · 02-27-2012, 11:01 PM

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!

vinz0r · 02-29-2012, 04:03 AM

Element Tuning's Dry sump? That thing looks monstrous. Thanks for the review. Will be getting a Crawford AOS most likely.

Si1ver&B1acK · 02-29-2012, 04:44 PM

Yep, I will be putting Element's dry sump, AOS, and Hydra to the test very soon.

04.SPT.WRX · 02-29-2012, 05:54 PM

Quote:

Originally Posted by lokey

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?

Supraru · 02-29-2012, 06:23 PM

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.

Sinister7 · 03-01-2012, 08:27 AM

Hey lokey and bill

lokey · 03-01-2012, 07:16 PM

Hey! (just visiting) :-)

shadowpr · 03-12-2012, 08:27 PM

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.

Cr4ckfi3nd · 03-18-2012, 01:07 PM

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

04.SPT.WRX · 03-19-2012, 06:47 PM

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.

Supraru · 03-19-2012, 06:59 PM

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.

Jubert39 · 03-19-2012, 07:06 PM

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?

Sinister7 · 03-20-2012, 06:45 PM

Quote:

Originally Posted by shadowpr

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

azn2nr · 03-21-2012, 12:49 AM

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.

shadowpr · 03-23-2012, 06:21 PM

Quote:

Originally Posted by Supraru

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

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

Supraru · 03-23-2012, 06:29 PM

Quote:

Originally Posted by shadowpr

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.

shadowpr · 03-24-2012, 09:33 AM

Quote:

Originally Posted by Supraru

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.

Supraru · 03-25-2012, 08:43 AM

Quote:

Originally Posted by shadowpr

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.

azn2nr · 03-28-2012, 01:53 AM

update: track day done. almost no consumption at the track at all. no smoking the next day either. car is running smooth as silk.

WRBWRX04 · 04-01-2012, 06:45 PM

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.

04.SPT.WRX · 04-13-2012, 05:09 PM

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.

Supraru · 04-13-2012, 06:17 PM

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.

02-27-2012, 02:48 PM	#28
lokey Scooby Newbie Member Sales Rating: (0) Member#: 261622 Join Date: Oct 2010 Chapter/Region: MAIC Location: Crofton, MD Vehicle: 2011 E85 WRX Ltd 5dr SWP	Thank you. Like this one? - Amazon.com: Braid Reinforced PVC Tubing, 1/2" 25' Length: Industrial & Scientific Amazon.com: Braid Reinforced PVC Tubing, 1/2" 25' Length: Industrial & Scientific My only concern: It's only rated to handle 175 degrees F. Last edited by lokey; 02-27-2012 at 03:02 PM.

02-27-2012, 11:01 PM	#29
Si1ver&B1acK Scooby Newbie Member Sales Rating: (5) Member#: 250668 Join Date: Jun 2010 Chapter/Region: South East Location: Cary, NC Vehicle: 2008 STI - (Silver) 06 Forester (Black)	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.

04-01-2012, 06:45 PM	#48
WRBWRX04 Scooby Newbie Member Sales Rating: (0) Member#: 274804 Join Date: Feb 2011 Chapter/Region: NWIC Location: 29 Palms CA, Vancouver WA Vehicle: 2004 WRX WRB	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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02-27-2012, 02:00 PM	#26
lokey Scooby Newbie Member Sales Rating: (0) Member#: 261622 Join Date: Oct 2010 Chapter/Region: MAIC Location: Crofton, MD Vehicle: 2011 E85 WRX Ltd 5dr SWP	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! * Registered users of the site do not see these ads.

02-27-2012, 02:26 PM	#27
monkiboy Scooby Specialist Member Sales Rating: (30) Member#: 202958 Join Date: Feb 2009 Chapter/Region: MAIC Location: washington, dc Vehicle: 2008 wrx	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.

02-29-2012, 04:03 AM	#30
vinz0r Scooby Newbie Member Sales Rating: (1) Member#: 154112 Join Date: Jul 2007 Chapter/Region: South East Location: Clearwater, FL Vehicle: 08 STi	Element Tuning's Dry sump? That thing looks monstrous. Thanks for the review. Will be getting a Crawford AOS most likely.

02-29-2012, 04:44 PM	#31
Si1ver&B1acK Scooby Newbie Member Sales Rating: (5) Member#: 250668 Join Date: Jun 2010 Chapter/Region: South East Location: Cary, NC Vehicle: 2008 STI - (Silver) 06 Forester (Black)	Yep, I will be putting Element's dry sump, AOS, and Hydra to the test very soon.

02-29-2012, 06:23 PM	#33
Supraru Scooby Specialist Member Sales Rating: (4) Member#: 23313 Join Date: Aug 2002 Location: Collegeville,Pa Vehicle: 99' 2.5Rs black	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.

03-01-2012, 08:27 AM	#34
Sinister7 Scooby Newbie Member Sales Rating: (0) Member#: 139685 Join Date: Feb 2007 Chapter/Region: RMIC Location: Denver CO Vehicle: 2006 WRX Sedan SGM	Hey lokey and bill

03-01-2012, 07:16 PM	#35
lokey Scooby Newbie Member Sales Rating: (0) Member#: 261622 Join Date: Oct 2010 Chapter/Region: MAIC Location: Crofton, MD Vehicle: 2011 E85 WRX Ltd 5dr SWP	Hey! (just visiting) :-)

03-12-2012, 08:27 PM	#36
shadowpr Scooby Specialist Member Sales Rating: (25) Member#: 273800 Join Date: Feb 2011 Chapter/Region: Tri-State Vehicle: 2009 WRX	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.

03-18-2012, 01:07 PM	#37
Cr4ckfi3nd Scooby Newbie Member Sales Rating: (0) Member#: 269647 Join Date: Jan 2011 Chapter/Region: TXIC Location: El Paso Vehicle: 2006 CGM STi New Name, Same Attitude	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

03-19-2012, 06:47 PM	#38
04.SPT.WRX Scooby Newbie Member Sales Rating: (4) Member#: 69568 Join Date: Sep 2004 Chapter/Region: MAIC Location: Southeastern, PA Vehicle: 2004 WRX Sedan PSM	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.

03-19-2012, 06:59 PM	#39
Supraru Scooby Specialist Member Sales Rating: (4) Member#: 23313 Join Date: Aug 2002 Location: Collegeville,Pa Vehicle: 99' 2.5Rs black	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.

03-19-2012, 07:06 PM	#40
Jubert39 Scooby Specialist Member Sales Rating: (53) Member#: 155598 Join Date: Aug 2007 Chapter/Region: NESIC Location: Vernon Connecticut Vehicle: 2004 AW Subaru WRX JDM v7 STI spec-C	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?

03-21-2012, 12:49 AM	#42
azn2nr Scooby Specialist Member Sales Rating: (19) Member#: 35276 Join Date: Apr 2003 Chapter/Region: RMIC Location: Salt Lake City, UT Vehicle: dust collector	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.

03-28-2012, 01:53 AM	#47
azn2nr Scooby Specialist Member Sales Rating: (19) Member#: 35276 Join Date: Apr 2003 Chapter/Region: RMIC Location: Salt Lake City, UT Vehicle: dust collector	update: track day done. almost no consumption at the track at all. no smoking the next day either. car is running smooth as silk.

04-13-2012, 05:09 PM	#49
04.SPT.WRX Scooby Newbie Member Sales Rating: (4) Member#: 69568 Join Date: Sep 2004 Chapter/Region: MAIC Location: Southeastern, PA Vehicle: 2004 WRX Sedan PSM	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.

04-13-2012, 06:17 PM	#50
Supraru Scooby Specialist Member Sales Rating: (4) Member#: 23313 Join Date: Aug 2002 Location: Collegeville,Pa Vehicle: 99' 2.5Rs black	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.