2-way / 3-way CAT
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Junior Member
Joined: Jun 2000
Posts: 57
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From: Southern Wisconsin
2-way / 3-way CAT
In Jegs they have 2-way, 3-way, and 3-way with AIR inlet tube, I do know what the AIR inlet tube is. But what is the difference between 2 and 3-way. I Have an 89 Iroc but I don't need the inlet tube. and the 2-way is the only one (of that brand) that comes with a 3" inlet. will the 2 way work. Cause you can only get an AIR inlet tube in 3-way.
so what are the differences in construction AND application.
Thanks anyone
so what are the differences in construction AND application.
Thanks anyone
Member
Joined: Jul 2000
Posts: 402
Likes: 0
From: SoCal
I would not judge which one is correct by going just with what is listed in the catalog. You should just get a direct replacement 3". Then you'll know you got the right one that fits. I got a direct replacement Catco 3" (86-89, single cat, 3" in/out) from summit for $112. It was easy to install myself.
summit part no.: CTO-9118
James
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1985 Z-28, 350 TPI, T-Tops, edelbrock 6085 heads, ZZ4 cam, accel base/runners & 24 lb/hr inj., ported plenum, everything gasket matched, crane AFPR, SLP 1 5/8 headers, single 3" flowmaster catback, 3" Catco cat, modified tranny, 165 ECM & ARAP code, MSD 6AL/wires, edelbrock STB, Spohn SFC, GW "wonderbar"
summit part no.: CTO-9118
James
------------------
1985 Z-28, 350 TPI, T-Tops, edelbrock 6085 heads, ZZ4 cam, accel base/runners & 24 lb/hr inj., ported plenum, everything gasket matched, crane AFPR, SLP 1 5/8 headers, single 3" flowmaster catback, 3" Catco cat, modified tranny, 165 ECM & ARAP code, MSD 6AL/wires, edelbrock STB, Spohn SFC, GW "wonderbar"
Member
Joined: Mar 2001
Posts: 205
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From: Billings, Mt
obviously you didnt understand when you replied, he was asking what the difference between three way and two way cats is, im assuming the flow would be different (not sure which way though), he wasnt asking about diameter.
Senior Member
Joined: Jul 1999
Posts: 994
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From: San Diego, CA
When cats first came out in about 1975, it only allowed for further combustion of HC and CO. (2)
Then later on, it added a 3rd element, NO.
I dont know if you would pass smog with only a 2 way converter. Maybe someone here has done it?
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1989 IROC-Z 5.7L
NOS 5151 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System
Then later on, it added a 3rd element, NO.
I dont know if you would pass smog with only a 2 way converter. Maybe someone here has done it?
------------------
1989 IROC-Z 5.7L
NOS 5151 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System
Supreme Member
Joined: Jul 1999
Posts: 1,366
Likes: 0
From: Atlanta, GA, US of A
Car: 94 Z28
Engine: LT1 w/ headers, catback, CAI, tune
Transmission: 4L60E
Axle/Gears: 3.23s
Yeah, 2way/3way determines how many pollutants the cat effects.
Just call Summit and order a 3" Inch Catco Cat. Talk to the rep, they have a direct replacement 3" unit (should fit all 86-92 single cat TPI applications, bolts to the I-pipe, slipon at y-pipe) . I have that on both my 87Z and my old 86 IROC. Works great. They were $99 when I bought them awhile back...
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Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray
[This message has been edited by Ray87Z (edited August 02, 2001).]
Just call Summit and order a 3" Inch Catco Cat. Talk to the rep, they have a direct replacement 3" unit (should fit all 86-92 single cat TPI applications, bolts to the I-pipe, slipon at y-pipe) . I have that on both my 87Z and my old 86 IROC. Works great. They were $99 when I bought them awhile back...
------------------
Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray
[This message has been edited by Ray87Z (edited August 02, 2001).]
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