Welcome to the North American Subaru Impreza Owners Club Tuesday November 12, 2019
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > FA Series Factory 2.0L Turbo Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 09-01-2015, 11:27 PM   #26
lavaheadache
Scooby Newbie
 
Member#: 276727
Join Date: Mar 2011
Chapter/Region: NESIC
Location: Cape Cod, MA
Vehicle:
2016 Sti
Ice Silver

Default

The funny thing about the bypass valve placement on the AEM is that while others are saying it's bad I actually think it's better than stock. Why wouldn't you want the pressure to escape as close to throttle plate as possible since that is where the door slams shut so to speak?

Do you really want that shock wave traveling all the way back down the intake tract?

Also it puts the valve away from the hot turbo and right smack on the top so you can put a fancy shmancy one there and show it off and make it easy to service. I used to lube the ones on my Audi and Gti every so often.
* Registered users of the site do not see these ads.
lavaheadache is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 09-02-2015, 10:23 AM   #27
dwelker
Scooby Newbie
 
Member#: 384247
Join Date: Mar 2014
Location: Rochester, NY
Vehicle:
2015 WRX Limited
World Rally Blue Pearl

Default

Quote:
Originally Posted by lavaheadache View Post
The funny thing about the bypass valve placement on the AEM is that while others are saying it's bad I actually think it's better than stock. Why wouldn't you want the pressure to escape as close to throttle plate as possible since that is where the door slams shut so to speak?

Do you really want that shock wave traveling all the way back down the intake tract?

Also it puts the valve away from the hot turbo and right smack on the top so you can put a fancy shmancy one there and show it off and make it easy to service. I used to lube the ones on my Audi and Gti every so often.
Sounds like there is no convincing you to get something else. You've already made up your mind. Go buy the AEM one and let us know how it is. I personally will be getting the PRL as my tuner recommended that one specifically.
dwelker is offline   Reply With Quote
Old 09-02-2015, 10:30 AM   #28
lavaheadache
Scooby Newbie
 
Member#: 276727
Join Date: Mar 2011
Chapter/Region: NESIC
Location: Cape Cod, MA
Vehicle:
2016 Sti
Ice Silver

Default

Quote:
Originally Posted by dwelker View Post
Sounds like there is no convincing you to get something else. You've already made up your mind. Go buy the AEM one and let us know how it is. I personally will be getting the PRL as my tuner recommended that one specifically.
No convincing? Nobody but he sales reps from the companies has offered up anything useful. Your tuner recommended the PRL pipe. Did he say why? Getting on the band wagon is fun but I want to know if there are performance reasons why I should spend more coin
lavaheadache is offline   Reply With Quote
Old 09-02-2015, 10:59 AM   #29
dwelker
Scooby Newbie
 
Member#: 384247
Join Date: Mar 2014
Location: Rochester, NY
Vehicle:
2015 WRX Limited
World Rally Blue Pearl

Default

Quote:
Originally Posted by lavaheadache View Post
No convincing? Nobody but he sales reps from the companies has offered up anything useful. Your tuner recommended the PRL pipe. Did he say why? Getting on the band wagon is fun but I want to know if there are performance reasons why I should spend more coin
You've received plenty of opinions so I wouldnt say the sales reps are the only ones offering up anything useful. One said that the mishimoto fit like crap and others said that they would stay away from AEM. I was recommended the PRL because my tuner had used it on the dyno and said that spool up time was decreased by a sizeable margin and that boost increased by 2psi everywhere. Also I have seen others say that the two piece design is much easier to install. Killer B is a good company and I would assume theirs will be good when it is released.
dwelker is offline   Reply With Quote
Old 09-02-2015, 12:08 PM   #30
KillerBMotorsport
NASIOC Vendor
 
Member#: 198281
Join Date: Dec 2008
Chapter/Region: MAIC
Location: Virginia
Vehicle:
2005 WRX/STi
WRB of course

Default

Quote:
Originally Posted by lavaheadache View Post
Why wouldn't you want the pressure to escape as close to throttle plate as possible since that is where the door slams shut so to speak?
With the advent of drive-by-wire, the throttle plate doesn't slam closed the way they used to.

There are lots of theories on BPV/BOV placement.

Quote:
Originally Posted by lavaheadache View Post
Do you really want that shock wave traveling all the way back down the intake tract?
So the theory is the closer to the throttle plate the less reversion. Consequently, the closer to the turbo, the less spin down in turbocharger RPM, meaning less time getting back into boost.

Quote:
Originally Posted by lavaheadache View Post
Also it puts the valve away from the hot turbo and right smack on the top so you can put a fancy shmancy one there and show it off and make it easy to service. I used to lube the ones on my Audi and Gti every so often.
Follow manufacturer's recommendations for servicing. Oiling attracts dirt and dirt can cause stiction and poor operation. The seal will wipe away most lubricant as well too. Definitely service as recommended by the manufacturer.
KillerBMotorsport is offline   Reply With Quote
Old 09-02-2015, 12:42 PM   #31
PRL Motorsports
Former Vendor
 
Member#: 420981
Join Date: May 2015
Chapter/Region: Tri-State
Location: Export, PA
Default

^ THIS.

Quote:
Originally Posted by lavaheadache View Post
No convincing? Nobody but he sales reps from the companies has offered up anything useful. Your tuner recommended the PRL pipe. Did he say why? Getting on the band wagon is fun but I want to know if there are performance reasons why I should spend more coin
Performance reasons?


Back to back comparison of our products on the same OTS Stage 1 map.


Stock turbo / motor record power.

There is another recent thread of 2 people confirming the same / similar gains with after installing our charge pipe as well. We could post time slips as well, but I don't think it's necessary. Until there is proof of other gains, it looks like our products are working quite well.
PRL Motorsports is offline   Reply With Quote
Old 09-02-2015, 01:38 PM   #32
ryager
Scooby Specialist
 
Member#: 342391
Join Date: Jan 2013
Location: Jacksonville NC
Vehicle:
2015 WRX
Black

Default

^ PRL has already shown their charge pipe works, along with that others have shown that it works and that the install was very nice and easy with this charge pipe. My biggest issue is what intercooler I want since many of them come with the hardware now I will have 2 charge pipes because I want to get the PRL one. This is mostly because of others posting their results, I do not want the AEM because of the BPV location. I just think that a company that is going to build a product that is wanted by masses amount of people should build it for the masses and not for the onsies and twosies that need to have a BOV to hear a noise. There is also other information showing the throttle response and boost response being changed with the movement of the BPV and that it can slow response. I am not an engineer so I cannot explain it as well as others, nor understand it as well as others. I do not want Mishimoto because of the rubbing in certain areas that has been reported. I am thinking about going with PW verticooler however I am thinking of waiting until they just sell the verticooler without the charge pipe or until someone can confirm how well their charge pipe is built.
ryager is offline   Reply With Quote
Old 09-02-2015, 02:33 PM   #33
dwelker
Scooby Newbie
 
Member#: 384247
Join Date: Mar 2014
Location: Rochester, NY
Vehicle:
2015 WRX Limited
World Rally Blue Pearl

Default

Quote:
Originally Posted by ryager View Post
^ PRL has already shown their charge pipe works, along with that others have shown that it works and that the install was very nice and easy with this charge pipe. My biggest issue is what intercooler I want since many of them come with the hardware now I will have 2 charge pipes because I want to get the PRL one. This is mostly because of others posting their results, I do not want the AEM because of the BPV location. I just think that a company that is going to build a product that is wanted by masses amount of people should build it for the masses and not for the onsies and twosies that need to have a BOV to hear a noise. There is also other information showing the throttle response and boost response being changed with the movement of the BPV and that it can slow response. I am not an engineer so I cannot explain it as well as others, nor understand it as well as others. I do not want Mishimoto because of the rubbing in certain areas that has been reported. I am thinking about going with PW verticooler however I am thinking of waiting until they just sell the verticooler without the charge pipe or until someone can confirm how well their charge pipe is built.
Very well said. Grimmspeed should be releasing their intercooler/charge pipe kit in the future as well.
dwelker is offline   Reply With Quote
Old 10-15-2019, 04:51 PM   #34
misterdavidoo
Scooby Newbie
 
Member#: 506874
Join Date: Sep 2019
Default

Quote:
Originally Posted by KillerBMotorsport View Post
It is... until you look at why that is. Then the justification for the price starts making sense.

To some, it doesn't matter they want cheap parts that offer any improvement over OEM. To others the quality, fitment, and features are worth the extra cost.

So starting at the bottom, we have a CNC'd billet aluminum 2-bolt adapter. The bellmouth transition reduces turbulence and we use tight fits on the bolt clearance holes to give nice concentric alignment to the turbo's compressor outlet as you'd find with port matching. Also a straight transition from the turbo vs mitered for less turbulent flow. Uses the stock style o-ring too.



The next bit is our designed "T" coupler. Smooth internal transitions and retains stock location of the BPV (OEM or aftermarket). Made from the best materials we could source.



The showpiece is the actually 'pipe' of the charge pipe. We uses stainless, which costs significantly more. The reason stainless makes a lot of sense here is that it does not transfer engine heat into the tubing nearly as much as aluminum. That and it is far more durable. In our own special twist (as far as I've seen), we use the largest bend radius on the market. The larger the bend the less turbulence and the higher the flow capacity.

* final production version does not have weld.



The last bit in the tract is the pipe to top mount coupler. Again, the best materials we could find.

The last bit is the hose clamps. We use full stainless steel high torque worm drive holes clamps with a smooth ID. These are time tested and we do not use or recommend anything else. We have significantly better luck with these than t-bolt clamps!

All engineering and design done in house. All materials, sourced from US Mills. All manufacturing done right here in the USA.


CAN I BUY ONE FROM YOU
misterdavidoo is offline   Reply With Quote
Old 10-15-2019, 07:42 PM   #35
killadawg
Scooby Newbie
 
Member#: 424203
Join Date: Jun 2015
Chapter/Region: NWIC
Location: Mountains WA
Vehicle:
2016 WRX stg 4 Rally
STI Drivetrain GM

Default

killadawg is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 02:26 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2019 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.