Page 1 of 1

AWIC folks...

Posted: Tue Nov 17, 2015 8:06 am
by impostor
Almost got my setup finished and am planning to run the pump full speed with ignition on but I was wondering if anyone is running a 20g ecu with the pump speed control. Or if you are making the speed vary by other means?

Re: AWIC folks...

Posted: Sat Nov 21, 2015 11:20 am
by James614
I'd be surprised if anyone that doesn't have a 100% stock setup is using the variable pump speed. Most AWIC guys don't want their pumps running slower than they need to be.

Re: AWIC folks...

Posted: Sat Nov 21, 2015 3:51 pm
by mike-tracy
If you ran the legacy ecu needed to control the awic pump, then you wouldn't be able to run a robtune. That would be a deal breaker for me.

Re: AWIC folks...

Posted: Sun Nov 22, 2015 12:06 am
by impostor
mike-tracy wrote:If you ran the legacy ecu needed to control the awic pump, then you wouldn't be able to run a robtune. That would be a deal breaker for me.
That's the answer I was looking for.

Re: AWIC folks...

Posted: Fri Dec 11, 2015 5:33 am
by georryan
Yeah just run it full speed. You may be able to figure out some way for the pump to vary its speed based on temperature, but then you'd need the ecu to get the temperature readings (which I'm not sure all the intercoolers came with), and you'd need an ecu that would control it, or you'd need to come up with some creative way to do it outside the ecu, and I'm not sure its worth the headache.

Re: AWIC folks...

Posted: Fri Dec 11, 2015 6:09 am
by jefferson
I think it could be done off a temp sensor in the water line or a boost sensor that would trigger the high speed with a time delay so it would keep running for a set time after getting out of the boost. I kind of like the idea of a 2 speed pump so there isn't the drag on the charging system all the time when it isn't needed.

Re: AWIC folks...

Posted: Sun Dec 13, 2015 7:35 pm
by Legacy777
Based on the info from the pump I'm using it only draws 8 amps max. Hell most stereos are rated for more amperage draw, so I wouldn't worry too much about it.

I like cool features like two or variable speed pumps, but complexity/cost vs. benefit are completely against doing it.

Re: AWIC folks...

Posted: Mon Feb 22, 2016 12:38 am
by impostor
Got my setup working quite well, and it looks VERY stock. Especially since its in an Impreza. Only hiccup was I had to vacuum fill the coolant. Filling the conventional way led to air pockets that wouldn't work themselves out.

Now the last thing is brackets. Does anyone have the factory rear bracket that bolts to the trans?

Re: AWIC folks...

Posted: Tue Mar 01, 2016 6:33 pm
by Legacy777
Got any pictures of the setup?

I don't know of anyone that has the brackets. You may want to post in the parts shed or in the Legacy group on facebook.

How did you go about "vacuum" filling? I have filling issues as well since I don't have a bleeder opening on the radiator.

Re: AWIC folks...

Posted: Sun Mar 06, 2016 7:56 am
by impostor
Unfortunately I didn't take any pics during the install but I will try to get some pics soon. I will say a TON of time was spent making it look like it belongs on this car. I used several bits of coolant tubes from later turbo EJ's and TIG welded a couple sections together to get the bends that I needed. I used your service manual links to get an idea of the stock routing and made it work quite well in a GC chassis. (THANK YOU for those by the way.) I ended up modifying an airbox bracket from a later EJ25 for the RH support. Of course the next day I did a clutch on a 98 RS and found the stock bracketry is very similar to what I did.

The vacuum filling was done using this little guy http://www.amazon.com/UView-550000-Airl ... B0002SRH5G The other techs I work with swear by it but I was a bit skeptical till I used it on mine. And I am using the stock Legacy radiator with the vent plug but I still had trouble without the vacuum filler.

I just got my Rob tune setup completed a couple weeks ago and everything is holding up great so far. (and it is WAY more fun to drive)

Re: AWIC folks...

Posted: Mon Apr 04, 2016 5:52 pm
by Legacy777
Sorry for the late reply, but thanks for the link to the vacuum filling tool.

Re: AWIC folks...

Posted: Wed Apr 06, 2016 5:15 am
by impostor
Here is a pic of the engine bay. Disregard the wrx piping being used as a pcv pipe. I'm slowly going back through things and cleaning up some sloppiness from the swap I did 14 years ago. After watching a friend put a fmic on his rsti using the JDM bumper beam I realized I wasted way too much time trimming the usdm beam.

http://s944.photobucket.com/user/Jim_Sh ... %20Uploads

Re: AWIC folks...

Posted: Wed Apr 06, 2016 5:33 pm
by Legacy777
Thanks for the picture.

Re: AWIC folks...

Posted: Thu Apr 07, 2016 5:39 am
by impostor
No problem. I wish I had time to take pictures of the piping as I went. It's almost a work of art how stock it looks. Luckily I work with a couple guys that can weld and fab just about anything I can dream up.

Re: AWIC folks...

Posted: Mon May 23, 2016 1:21 am
by impostor
Cleaned up a bunch of stuff. Located free OE PCV hoses and a stock bypass valve. The horn clears the filter by an inch or so but I'm tired of moving them so they'll stay there for now.

Image

Re: AWIC folks...

Posted: Fri Jun 24, 2016 7:26 pm
by Soobster
What model/year Subaru does the AWIC setup come from? Looking for info for a EJ22T swap into a Vanagon.

Re: AWIC folks...

Posted: Fri Jun 24, 2016 7:48 pm
by Legacy777
It came on the overseas first generation Legacy/Liberty 89-93

Re: AWIC folks...

Posted: Fri Jun 24, 2016 8:02 pm
by Soobster
Nice! Yeah I've heard that the non-US Legacy models had intercoolers and produced quite a bit more HP. Do you know about how much more HP could be gained by adding an AWIC to the stock US 91 Legacy SS setup with the VF11 turbo?

Re: AWIC folks...

Posted: Fri Jun 24, 2016 10:57 pm
by mike-tracy
Adding an intercooler won't gain any power by itself. But... You could safely raise the boost with a manual boost controller to just under fuel cut at 13 PSI. Stock boost is 8.9 PSI so it will be noticeable for sure. It's anyone's guess how much power over the 160hp stock number that will net you. Close to 200 hp I'd imagine.

Re: AWIC folks...

Posted: Fri Jun 24, 2016 11:19 pm
by Soobster
That sounds like the ticket for my Stage 0 setup. I've got the engineering chops to build a simple PID coolant temp controller with an Arduino or mini-stamp to supervise the pump. When I get there, I'll be sure to post that up here.

Have there been other US Subaru models with AWIC setups?

Re: AWIC folks...

Posted: Sun Jun 26, 2016 10:35 pm
by James614
Sadly no US models with AWICs, and nothing prior to our 2002 WRX even offered with an intercooler at all..

Re: AWIC folks...

Posted: Mon Oct 10, 2016 11:53 am
by RoughDiamond
Just to add my 2 cents here, but I've been pouring over the OE Legacy Intercooler control logic (according to the FSM) and it seems to be strictly based upon throttle opening percentage. There's a table that says when the pump runs full speed, but it essentially runs as soon as the ignition is switched on. The wiring feeds directly to relay 1 and the dropping resistor, then the pump. The ECU only controls the full speed relay 2 which bypasses the resistor.

According to the FSM, the pump goes in to overdrive at 80% throttle opening. I'd imagine you can run it as a low speed full time if you had a larger heat exchanger up front.

Re: AWIC folks...

Posted: Tue Nov 01, 2016 11:30 am
by RoughDiamond
My Legacy 20G is running the variable speed control. You can bypass it by jumping the dropping resistor and it will run at full speed with ignition on.

I plan on going with an ESL in the future for any management upgrades, so keeping the two step pump is possible.

I'm keeping the low speed as I don't want to burn-out the pump and I'm still on the VF12.

Re: AWIC folks...

Posted: Tue Nov 01, 2016 9:06 pm
by dscoobydoo
I was using the Ford Mustang pump and if you are looking to upgrade it flows quite a bit more and works good on single speed.


Sent from my iPhone using Tapatalk

Re: AWIC folks...

Posted: Thu Nov 24, 2016 4:08 am
by James614
Ford, GM, and Mercedes AWIC parts can be found dirt cheap and are designed for 380-600+hp systems, definitely worth looking into for pumps and front heat exchangers.