Welcome to the North American Subaru Impreza Owners Club Saturday December 20, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Normally Aspirated 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.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 01-20-2001, 01:35 AM   #1
jhuang76
Scooby Newbie
 
Member#: 1284
Join Date: Apr 2000
Vehicle:
2005 Legacy GT
Royal Blue Pearl

Post First impressions: Random Tech's high flow cats...

I just had Random Technologies install new high flow converters in my near stock subie. My first impression was that I regained the low end torque lost with the "Ganz" intake. Before, at low RPM (rolling out or a simple shift into second), the car would bog down. Now, the car seems to not have that bogging down sensation. As far as over power, I can't tell (butt dyno is not accurate enough). Plus, w/ stock headers and mid-pipe, the high flow cats won't be that much of a difference.

ALSO, random tech is considering doing a complete exhaust setup (and getting that stupid 90 degree kink out). Too bad there isn't a 4 wheel dyno in Atlanta.
* Registered users of the site do not see these ads.
jhuang76 is offline   Reply With Quote
Old 01-20-2001, 03:59 AM   #2
Buckbomb
Scooby Specialist
 
Member#: 2573
Join Date: Oct 2000
Location: Portland Or . SPEC
Question

Interesting, how much do the cats cost?
Buckbomb is offline   Reply With Quote
Old 01-20-2001, 09:50 AM   #3
Scottie
Scooby Specialist
 
Member#: 2080
Join Date: Aug 2000
Location: CT
Vehicle:
06 Impreza Wagon
Red

Post

Joseph,
I assume since you used the plural "cats" and "converters" that you replaced both stock cats, correct?

You have the TEC-II, correct?

Are you still using the two stock O2 sensors plus a third for the TEC-II? You're using the TEC-II in Shiv's PEMS set-up, correct?

Do you have any form of OBD-II scan tool? I'm just curious as to the typical front an rear O2 sensor readings from both before and after the install of the "high flow cats".

Are the "high flow cats" of Random's own design, or are they bought from another source? Again, just curious. I'm wondering if there is any link back to a company in CT that is at the leading edge of catalytic technology.

Scottie is offline   Reply With Quote
Old 01-20-2001, 12:20 PM   #4
kastle
Frank Army
 
Member#: 1457
Join Date: May 2000
Chapter/Region: SWIC
Location: Phoenix, AZ
Vehicle:
1999 Outback Sport
Steel Blue Mica

Post

I know you can get a 3way hi-flow dynomax cat form <a href="http://www.jegs.com" target="new">jegs.com</a> for only $51. That's what I had instlled on the SVX-T.

kastle
<a href="http://www.azscooby.com" target="new">azscooby.com</a>
kastle is offline   Reply With Quote
Old 01-20-2001, 02:49 PM   #5
jhuang76
Scooby Newbie
 
Member#: 1284
Join Date: Apr 2000
Vehicle:
2005 Legacy GT
Royal Blue Pearl

Post

Sorry, they replaced the two cats with just on hi-flow catalytic converter. There will be sockets for the 2 O2 sensor to be plugged in (for those with TEC-II like mine, they can tap a 3rd O2 sensor - in the front). This way, there won't be any CE lights.

Also, I do not have an OBDII sensor. I know a Subaru Mechanic w/ the Subaru reader, so I'll try and get a reading. But, I do not have a before scan.

I will ask Random if the cats are their own design.

Joe
jhuang76 is offline   Reply With Quote
Old 01-21-2001, 09:28 PM   #6
cj917
Scooby Specialist
 
Member#: 627
Join Date: Dec 1999
Location: boston
Vehicle:
MY96 outback wagon

Question

joe, have you had a chance to get some emission numbers? and what is the inner diameter of the tubing on the one you got?
cj917 is offline   Reply With Quote
Old 02-04-2001, 12:14 AM   #7
jhuang76
Scooby Newbie
 
Member#: 1284
Join Date: Apr 2000
Vehicle:
2005 Legacy GT
Royal Blue Pearl

Post

OK. Trying to get Random to join this forum. Anyways, I think the inner diameter is 2.25". So far, after 400+ miles, no check engine light (knock on wood).

Did not get a chance to do emissions. Been really busy.

Joe
jhuang76 is offline   Reply With Quote
Old 02-04-2001, 12:25 AM   #8
AaronB
Worst Mod Ever
Moderator
 
Member#: 369
Join Date: Oct 1999
Chapter/Region: SWIC
Location: Phoenix, AZ
Vehicle:
12 Vagon

Post

I have 2 2.5" hi-flow cats from Jeg's. With the turbo I haven't thrown one single check engine light in 1000 miles. Still using both stock 02 sensors.

AaronB is offline   Reply With Quote
Old 02-14-2001, 02:01 PM   #9
DigDug
Scooby Newbie
 
Member#: 4077
Join Date: Feb 2001
Location: Eastern US
Vehicle:
1999 Impreza 2.5RS
Aspen White

Lightbulb

I'm curious - I have looked on Random's website, and have checked some of their "dealer"s' websites, and I can't find any listing for Subaru Imprezas (or any Subaru for that matter). Where can I find this? I have a 99 2.5RS, for the record.

Also, replacing the two factory cats with a single one would require some sort of intermediate connector pipe. Does this come with the cat or something? Does the Random cat replace the 90-degree-angle (front) cat?
DigDug is offline   Reply With Quote
Old 02-15-2001, 08:30 AM   #10
DigDug
Scooby Newbie
 
Member#: 4077
Join Date: Feb 2001
Location: Eastern US
Vehicle:
1999 Impreza 2.5RS
Aspen White

Unhappy

Please? Somebody answer?! Need... info... soon...
DigDug is offline   Reply With Quote
Old 02-15-2001, 08:39 AM   #11
Nat
Scooby Specialist
 
Member#: 759
Join Date: Jan 2000
Chapter/Region: NESIC
Location: Warwick, RI
Vehicle:
2004 WRX
2000 SV650

Post

Random doens't actually make something for Subarus...only a custom setup. When I emailed them about a year ago they said they currently had nothing in stock, but if I gave them all the dimensions (or better yet go there myself) they could build something up.
Nat is online now   Reply With Quote
Old 02-15-2001, 09:24 AM   #12
DigDug
Scooby Newbie
 
Member#: 4077
Join Date: Feb 2001
Location: Eastern US
Vehicle:
1999 Impreza 2.5RS
Aspen White

Unhappy

Bummer. I heard somebody say that Random did have an application for the Impreza, but their website didn't have a listing on the application list... Oh well, I guess maybe I can just run one of the two stock cats, but I would still need a connector pipe to run from the primary cat to the B-pipe. Anybody know where I can get one of these?
DigDug is offline   Reply With Quote
Old 02-15-2001, 11:17 AM   #13
mhj
Scooby Newbie
 
Member#: 3057
Join Date: Nov 2000
Location: Arlington, MA
Post

i've heard complaints that Random's catalyst material is too brittle, so if you have an exhaust leak between the engine and cat (popping noise when decelerating) or if you backfire, you can destroy the honeycomb.

I remember reading on a Honda board, a guy took off his Random cat after a few thousand miles and it was hollow. It just disintegrated.

Of course this was a while ago, and they may have since fixed the problem.

Also, I remember talking to a guy from Borla and he told me that most cats are already high flowing by design and that aftermarket ones don't buy you much (especially at their $400 price tags).
mhj is offline   Reply With Quote
Old 02-15-2001, 11:36 AM   #14
Nat
Scooby Specialist
 
Member#: 759
Join Date: Jan 2000
Chapter/Region: NESIC
Location: Warwick, RI
Vehicle:
2004 WRX
2000 SV650

Post

My buddy had Random cats on his 535rwhp Camaro and also mentioned some slight reliability issues. He mentioned that they were kinda fragile, and if you bounced them off a speed bump, they would break up and die. I mentioned this in the email I sent to Random, and was told that their cats have warranties on them (can't remember how long) and that they would do their best to keep customers happy. Who knows to what extent they would go..but a lot of people back home have been happy with them.
Nat is online now   Reply With Quote
Old 02-15-2001, 09:03 PM   #15
Sunrise City Rider
Scooby Specialist
 
Member#: 1503
Join Date: May 2000
Chapter/Region: South East
Location: Sunrise, FL, USA
Vehicle:
2000 Impreza W"RS"X
Blue Ridge Pearl

Question

If they don't make an Impreza specific design, then why the hell do they list the "Imprezza" as one of their applications in their ad.
Zee
Sunrise City Rider 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
WTB: random tech high flow cat for GC RS soobyfan Private 'Wanted' Classifieds 13 10-13-2004 05:42 PM
Installed random tech high flow cat converter: Full exhaust review. powerlabs Normally Aspirated Powertrain 30 05-26-2004 08:14 PM
2nd Gen Random Tech High Flow Cat? Imprezafan1 Normally Aspirated Powertrain 3 02-11-2003 12:47 AM
random tech high-flow cat installed Poppa smurf Normally Aspirated Powertrain 34 10-06-2001 11:20 AM
Random Technology's high flow cat OsakaGangsta Normally Aspirated Powertrain 8 06-30-2001 11:53 AM


All times are GMT -4. The time now is 05:00 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.