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Topic Review (Newest First)
01-26-2014 01:52 PM
2xs
Quote:
Originally Posted by Wombat Ranger View Post
I would think there would be some way to get around the O2 thing. It's possible you might even be able to just run it on one side and plug the other, since it measures the A/F ratio, not the volume of burnt fuel particles.
It measures O2, your computer calculates, the A/F ratio with this number combined with temp and vacuum (the O2 number is the most important).
01-26-2014 11:19 AM
Wombat Ranger I would think there would be some way to get around the O2 thing. It's possible you might even be able to just run it on one side and plug the other, since it measures the A/F ratio, not the volume of burnt fuel particles.
01-26-2014 10:13 AM
48willys
Quote:
Originally Posted by Wombat Ranger View Post

I looked in your profile to find that you have a 92, so I assume you have a 4.0. Early 2000's models had a dual output manifold, and some companies make headers for these models. I would think you could use one of those on your engine, the only hitch I can think of would be I don't know what you would do about your single O2 sensor.
Yep it's a '92 4.0. Sorry for not mentioning that!

I'm going to look for the dual output manifold. I'll have to figure out the sensor (no smog testing or inspection in Michigan thank God!). I'll look at a custom bent exhaust with minimal mufflerage lol. I want real duals.

Some of the new cars crack me up. An econobox where you can actually see the two pipes coming out of the single muffler is ridiculous. Not sure what they're trying to prove.
01-25-2014 11:53 PM
2xs
Quote:
Originally Posted by Mowrangler View Post
Sorry I didnt realize you lived in the part of the U.S. that is under communist control.I dont see how they could give you greif over a muffler with two tailpipes coming out of it.A lot of cars come from the factory that way.
2 tailpipes? thats ok, true dual exhaust, no.
to install true duals, thats 2 full exhaust systems.
Dual tailpipes doesnt matter, anyone can get a 1 in 2 out muffler and pipe it however they want.
Cali/Federal just wants everything AT and BEFORE the cat to be stock, or an approved aftermarket part.

Database: Aftermarket Parts Database of Executive Orders

Cali pretty much writes the rules as far as Federal approved stuff, most states follow Cali aftermarket parts exemptions.
01-25-2014 10:49 PM
Nubby55
Quote:
Originally Posted by Mowrangler View Post
There was a company called Clifford Research that did a lot with 6 cyl motors. IdK if they are still around tho.

They where still kicking a year ago when I bought a 4Bl. intake to go on my 4.0 head for my stroker motor.
There motto is 6=8
01-25-2014 08:52 PM
Mowrangler
Quote:
Originally Posted by 2xs View Post
I know this, but the Jeep YJ NEVER came from JEEP with dual exhaust, so it is an illegal modification...

I use it about once a week for those older vehicles that are still around that came from the factory with dual exhaust.
The one we use in Cali has a tap near the probe that allows the attachment of a second hose and tip for the second exhaust exit.
Sorry I didnt realize you lived in the part of the U.S. that is under communist control.I dont see how they could give you greif over a muffler with two tailpipes coming out of it.A lot of cars come from the factory that way.
01-25-2014 02:15 PM
Wombat Ranger
Quote:
Originally Posted by 48willys View Post
Does anyone make a true duals manifold for the six?
I looked in your profile to find that you have a 92, so I assume you have a 4.0. Early 2000's models had a dual output manifold, and some companies make headers for these models. I would think you could use one of those on your engine, the only hitch I can think of would be I don't know what you would do about your single O2 sensor.
01-25-2014 01:17 PM
2xs
Quote:
Originally Posted by Mowrangler View Post
Actually emission stations have an adapter that slips over the end of the probe with 2 tubes on it . It is meant for cars with factory DUALS,it gets an equal sample from both sides. We use to have emission testing in Florida and I have seen it used a lot.
I know this, but the Jeep YJ NEVER came from JEEP with dual exhaust, so it is an illegal modification...

I use it about once a week for those older vehicles that are still around that came from the factory with dual exhaust.
The one we use in Cali has a tap near the probe that allows the attachment of a second hose and tip for the second exhaust exit.
01-25-2014 07:31 AM
Mowrangler
Quote:
Originally Posted by 2xs View Post
I was thinkign about posting this:

In order for your exhaust to duel, you would need dual exhaust, they could duel and duel until one wins, then one would die, and you would end up with single exhaust and all would be good....
Dual exhaust will also fail an emissions test, not only do you need single exhaust as Jeep designed, but duel exhaust would make it tough for the inspector to inspect, he might be hit with a wayward muffler from your dual exhaust during the duel...
Actually emission stations have an adapter that slips over the end of the probe with 2 tubes on it . It is meant for cars with factory DUALS,it gets an equal sample from both sides. We use to have emission testing in Florida and I have seen it used a lot.
01-25-2014 03:06 AM
Michigan jeeper
Quote:
Originally Posted by 2xs View Post
I was thinkign about posting this: In order for your exhaust to duel, you would need dual exhaust, they could duel and duel until one wins, then one would die, and you would end up with single exhaust and all would be good.... Dual exhaust will also fail an emissions test, not only do you need single exhaust as Jeep designed, but duel exhaust would make it tough for the inspector to inspect, he might be hit with a wayward muffler from your dual exhaust during the duel...
My bad guys dual exhaust haha Except if it were to backfire then it may sound like an exhaust duel haha but here in Michigan we don't have inspections so I don't have to worry about that
01-25-2014 03:02 AM
Michigan jeeper
Quote:
Originally Posted by 48willys View Post
Does anyone make a true duals manifold for the six?
I actually have a set of them in my garage
01-24-2014 06:56 PM
2xs
Quote:
Originally Posted by Mowrangler View Post
DUEL =2 guys have a fight with pistols

DUAL = 2 (pipes or whatever)
I was thinkign about posting this:

In order for your exhaust to duel, you would need dual exhaust, they could duel and duel until one wins, then one would die, and you would end up with single exhaust and all would be good....
Dual exhaust will also fail an emissions test, not only do you need single exhaust as Jeep designed, but duel exhaust would make it tough for the inspector to inspect, he might be hit with a wayward muffler from your dual exhaust during the duel...
01-24-2014 06:47 PM
harleydragon I just saw a donor that you could build a monster out of..84 chevy 1 ton..454,400 turbo,205 t-case,dana 60 front,14 bolt rear...navy base fire dept. truck..45,000 original miles $3500
01-24-2014 06:28 PM
Mowrangler
Quote:
Originally Posted by harleydragon View Post
being an old wrench,I am surprised that you have not hotrodded it yet
I am just looking for the right deal for a donor to transplant.Ive spent the last 6 month just fixing what was broke.Leaning towards a 4.3.
01-24-2014 06:02 PM
harleydragon
Quote:
Originally Posted by Mowrangler View Post
Hey wait a minute I own one of those cap pistols
being an old wrench,I am surprised that you have not hotrodded it yet
01-24-2014 05:05 PM
Mowrangler
Quote:
Originally Posted by 48willys View Post
Does anyone make a true duals manifold for the six?
There was a company called Clifford Research that did a lot with 6 cyl motors. IdK if they are still around tho.
01-24-2014 04:41 PM
harleydragon
Quote:
Originally Posted by 48willys View Post
Does anyone make a true duals manifold for the six?
it's been several years but I had a 6 cylinder jeep with split headers..I want to say they were offenhauser but it's been a long time
01-24-2014 04:37 PM
48willys Does anyone make a true duals manifold for the six?
01-24-2014 03:24 PM
Mowrangler
Quote:
Originally Posted by harleydragon View Post
in this case maybe it was cap pistols
Hey wait a minute I own one of those cap pistols
01-24-2014 03:17 PM
harleydragon
Quote:
Originally Posted by Mowrangler View Post
DUEL =2 guys have a fight with pistols

DUAL = 2 (pipes or whatever)
in this case maybe it was cap pistols
01-24-2014 02:56 PM
Mowrangler DUEL =2 guys have a fight with pistols

DUAL = 2 (pipes or whatever)
01-24-2014 02:34 PM
Michigan jeeper Here's a video clip of it running sounds better now after break in but you get the idea http://m.youtube.com/watch?v=ij5EYbIskJM
01-24-2014 02:30 PM
Michigan jeeper
Quote:
Originally Posted by justflint View Post
Would you mind sharing your layout/ design for it. I really want to do this with my 2.5l yj
It's just a single pipe to the flowmaster with a duel output and duel pipes all the way to behind the wheels
01-24-2014 02:28 PM
Michigan jeeper
Quote:
Originally Posted by Thomas S View Post
Is it really dual exhaust or just dual pipes AFTER the muffler?
It's just duels after the muffler but it sounds pretty good if say and so have many others
01-24-2014 08:06 AM
Rmn42689 This is what I did with mine. I have no rear track bar which made room for the exhaust.

Attachment 696993



Attachment 696985



Attachment 696977



Attachment 696969
01-24-2014 07:19 AM
Thomas S Is it really dual exhaust or just dual pipes AFTER the muffler?
01-24-2014 01:54 AM
dwsutton dual exhaust on a 2.5 ? That is 1.25 L per exhaust.
01-24-2014 01:33 AM
justflint
Quote:
Originally Posted by Michigan jeeper View Post
Anyone else out there have duel exhaust on there inlines? I just got a flowmaster 40 series muffler and duel exaust on my 2.5l 4 cylinder and it sounds pretty dang good for a 2.5l! Just curious if I'm the only one?

Would you mind sharing your layout/ design for it. I really want to do this with my 2.5l yj
04-27-2013 05:51 PM
Squirrel 442 Most guys just run a bigger single pipe, but it is all up to you. That is the great thing about having your own jeep.
04-26-2013 11:15 PM
Grizzlycb I have a Pace Setter Header and a super 44 Series flow master and I love the way my 2.5 sounds. no dual exhaust though...
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