High Flow Cat - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > High Flow Cat

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineFS: Wrangler RGB Multicolor Fog Light LEDs: Awesome EffectSavvy Aluminum Gas Tank Skid

Reply
Unread 09-18-2001, 07:56 AM   #1
JeeperJay
Registered User
 
Join Date: Aug 2001
Location: Westland, MI
Posts: 148
High Flow Cat

I've got a 92 YJ 2.5 and its time for a new cat. I'm looking for a high flow cat and I was wondering who makes them for this application and where I can find one. Thanks.

__________________
1992 YJ, 2.5L 4-banger, 2" Lift, 31x10.5 BFG Mud Terrain, K&N Filter, Restrictor Removed, Hi-Lift, Custom bumpers, More to come...
JeeperJay is offline   Reply With Quote
Unread 09-18-2001, 06:26 PM   #2
osburn
Registered User
1995 YJ Wrangler 
 
Join Date: Nov 2000
Location: Santee, CA U.S.A.
Posts: 1,148
If you haven't upgraded the rest of your exhaust system, a high flow cat is just gonna be a waste of money. Hell, it's pretty much a waste of money in any case.
__________________
Matt Osburn
Greengo
Rigrater Score 1032
osburn is offline   Reply With Quote
Unread 09-18-2001, 06:57 PM   #3
JeeperJay
Registered User
 
Join Date: Aug 2001
Location: Westland, MI
Posts: 148
I kinda thought I might get an answer like that. I did find some today and they sure aren't cheap. I wish I could just rip the darn thing off but from what I hear its not a good idea with the 4-banger. I think I'll just get a stock replacement. Thanks.
__________________
1992 YJ, 2.5L 4-banger, 2" Lift, 31x10.5 BFG Mud Terrain, K&N Filter, Restrictor Removed, Hi-Lift, Custom bumpers, More to come...
JeeperJay is offline   Reply With Quote
Unread 09-19-2001, 09:23 PM   #4
91 sahara
Registered User
 
Join Date: Jul 2001
Location: monroe, wa
Posts: 19
summit racing catco hi-flo cat 2 1/4 $59.99
__________________
91 sahara 4.0 5sp hardtop 31's on 15x8 m/t classic 2's rock-it air intake and k&n so far.
91 sahara is offline   Reply With Quote
Unread 09-20-2001, 09:07 AM   #5
blackjeep
Registered User
 
Join Date: Aug 2001
Location: johnstown
Posts: 120
you could always do it this way . Take a piece of pipe not sure what size and just smaah it right though the catand bolt it back up. you will have better exhaust flow and it will still pass inspection
__________________
95 wrangler 1.5" springover Dana44 front Ford8.8 rear 4.10's 35x12.50 MTR's
blackjeep is offline   Reply With Quote
Unread 09-20-2001, 09:58 PM   #6
I-4
Registered User
 
Join Date: Jul 2001
Location: deep in the heart of texas
Posts: 286
jeeper jay,i have a hi-flo cat with a flo-master.yes on a 4 popper.it is a bit loud,but the muffler helps to change the tone so it doesn't sound as bad as a pimped out rice rocket.as for the other advice given,i think he gets off on pissing in eveybodies cheerios.just my passing thought.
__________________
95 yj...
who ever said putting a spool in a daily driver was a bad idea was just jealous he had not tried it first...
I-4 is offline   Reply With Quote
Unread 09-20-2001, 10:33 PM   #7
osburn
Registered User
1995 YJ Wrangler 
 
Join Date: Nov 2000
Location: Santee, CA U.S.A.
Posts: 1,148
Sorry I-4, I just sorta figured he wanted to know the truth.
__________________
Matt Osburn
Greengo
Rigrater Score 1032
osburn is offline   Reply With Quote
Unread 09-20-2001, 10:45 PM   #8
I-4
Registered User
 
Join Date: Jul 2001
Location: deep in the heart of texas
Posts: 286
the whole cat thing won't work without a good muffler.you will have to be careful that you don't lose too much backpressure or it will run like crap.the cat by itself won't do a thing for you.there are several mods that should go hand in hand with this.when these are all put together you get a little something more out of your four popper.remember, it's just a 4 popper,you can only get so much from it.i think this is what "others" where trying to say in their normal pissy fashion.
__________________
95 yj...
who ever said putting a spool in a daily driver was a bad idea was just jealous he had not tried it first...
I-4 is offline   Reply With Quote
Unread 09-20-2001, 11:01 PM   #9
osburn
Registered User
1995 YJ Wrangler 
 
Join Date: Nov 2000
Location: Santee, CA U.S.A.
Posts: 1,148
Actually, no that's not what I'm saying. I'm saying 4 banger, 6 whatever, a hi-flow cat ain't gonna make much difference. Although, if sahara has found them for $59, I'd say jump on them. That's a good price for any cat.

Attempting to insult me doesn't make a cat work better by the way.
__________________
Matt Osburn
Greengo
Rigrater Score 1032
osburn is offline   Reply With Quote
Unread 09-20-2001, 11:13 PM   #10
I-4
Registered User
 
Join Date: Jul 2001
Location: deep in the heart of texas
Posts: 286
well here we go,
the engine should ideally be able to breathe better(modified intake)to take advantage of the hi flo cat.there are sveral ways to do that.a modified intake,tb spacer,filter,location of the intake,even a different tb,etc...then on the back side you can do an exhaust manifold as osburn suggested.these things put together with a hi-flo cat and good muffler will give you some more power.one simple trick that will give you the most hp gain is a set of electric fans.i know this gets a bit expensive to do all at once.just do it in pieces as you can,that is the pleasure of building a jeep!


that cat works even better with knowledge!
__________________
95 yj...
who ever said putting a spool in a daily driver was a bad idea was just jealous he had not tried it first...
I-4 is offline   Reply With Quote
Unread 09-21-2001, 09:04 AM   #11
JeeperJay
Registered User
 
Join Date: Aug 2001
Location: Westland, MI
Posts: 148
So lets say I don't have any intake or exhaust mods yet. Would a high flow cat actually hurt my performance?
__________________
1992 YJ, 2.5L 4-banger, 2" Lift, 31x10.5 BFG Mud Terrain, K&N Filter, Restrictor Removed, Hi-Lift, Custom bumpers, More to come...
JeeperJay is offline   Reply With Quote
Unread 09-21-2001, 11:02 AM   #12
Pantera
Registered User
 
Join Date: Jul 2001
Posts: 97
Considering the age of your rig, my guess is your cat is gonna be pretty clogged right now... Not enough to keep you from running, but prolly stealing power nonetheless... Even putting a stock cat on it will prolly increase your power, but IMHO don't replace, UPGRADE!!! I don't think anyone can argue with that...
__________________
Eddie H.
91 YJ 4-Banger
Omaha, NE
Pantera is offline   Reply With Quote
Unread 09-21-2001, 01:35 PM   #13
I-4
Registered User
 
Join Date: Jul 2001
Location: deep in the heart of texas
Posts: 286
certainly wouldn't hurt any thing.in my case it was cheaper to go to the flomastr and hi flo cat.everywhere wanted $400 to put it stock.one guy here in irving wanted $250 to put a hi-flo cat and flo master.so the choice was obvious.
__________________
95 yj...
who ever said putting a spool in a daily driver was a bad idea was just jealous he had not tried it first...
I-4 is offline   Reply With Quote
Unread 09-24-2001, 03:02 PM   #14
Chris C
Registered User
 
Join Date: Jul 2001
Location: Canandaigua, NY
Posts: 21
Adding a high flow cat could never hurt your performance. However, punching out the existing cat could reduce the back flow too much. If you replace your cat with a higher flow model now, you are most likely to notice the difference once you unrestrict your intake and the rest of your exaust. When I used to drag turbo cars, we explained it like this:
"Take a Burger king straw, and try to take ten deep breaths through it. Now do the same thing without the straw like you normally would. It is the same before and after for your car/truck/Jeep."

-My2Cents

Chris C.
__________________
Chris C.
'89 YJ 4 Banger
1 1/2" Shackle Lift
30x9.5x15's on American Racing Nitro 15x8's
Custom Lock Box
Homemade Exaust
More stuff soon.
"I like it dirty"
Chris C is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.