I have a lg4 and was going to remove the smog pump. I stopped after I heard that the pump injects air into the cat to keep it from clogging up. If I remove the smog pump completely (right now this is all it is doing) will the cat clog. I will be putting on a strait pipe, should I wait untill then?

 

I've had mine disconnected for 2 years. Never had a problem. I've got a high flow cat installed as well.

Thanks

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89 GTA G92
305 TPI WC 5spd w/3.45
Accel Cap & 8mm Taylor's
Custom 4" Cold Air Induction
Jet Airfoil
K&N Airfilter
160 deg stat/fan switch TB Bypass - Steel Rad
Cat back 3" Exhaust w/Terminator Muff.
HiGh FlOw Dynomax Cat
Spohn LCA's - KYB GR-2's
Autometer Vac+Oil Temp

 

Don't bother removing it unless you take your cat off. I took the belt off mine yesterday and it made no difference in acceleration so I put it back on.

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1986 CAMARO Z28 ->
151,000 original miles, 43,000 on 89' vette 350 block, Holley 650 DP, Weiand intake, 1.6 rockers, 1 5/8" headers, no cat, 2 1/2" Flowmaster catback, Mallory coil, March pulleys, T5 with 3.35 1st gear and 0 miles, 90% Centerforce clutch, 3.73 posi, Eibach 1" drop springs, Spohn LCA's, Spohn adjustable panhard rod, Subframe connectors, polyurethane swaybar bushings/endlinks, 2 12" Sound Streams, 2 Infinity 6X9's, 2 Pioneer 6X9's, 800 watt Lanzar Vibe amp. ET 13.22@ 106.4MPH 3300lbs less driver and speakers Next mods-> B&M shifter, Extreme Energy 230/236 cam, Holley street dom intake.

1987 TRANS AM ->
73,000 miles, 305TPI, auto, all stock.

 

If you don't have a sniffer test in your area, you may want to go ahead and gut the cat. It takes awhile to get off, if you've never messed with exhaust before. If you gut it now, then you'll have peace of mind that it won't clog.

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--Steve S--
1984 Trans Am 305 LG4, 5 speed
Daily Driver, Flowmaster 80 Series
NOW FEATURING: Holley 600 cfm & vacuum advance

 

Can you tell a difference in sound and power with the cat removed? The one on my camaro was removed when I bought it. I was thinking of doing it to my T/A.

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1986 CAMARO Z28 ->
151,000 original miles, 43,000 on 89' vette 350 block, Holley 650 DP, Weiand intake, 1.6 rockers, 1 5/8" headers, no cat, 2 1/2" Flowmaster catback, Mallory coil, March pulleys, T5 with 3.35 1st gear and 0 miles, 90% Centerforce clutch, 3.73 posi, Eibach 1" drop springs, Spohn LCA's, Spohn adjustable panhard rod, Subframe connectors, polyurethane swaybar bushings/endlinks, 2 12" Sound Streams, 2 Infinity 6X9's, 2 Pioneer 6X9's, 800 watt Lanzar Vibe amp. ET 13.22@ 106.4MPH 3300lbs less driver and speakers Next mods-> B&M shifter, Extreme Energy 230/236 cam, Holley street dom intake.

1987 TRANS AM ->
73,000 miles, 305TPI, auto, all stock.

 

Can you guys explain this smog removal thing, does it help performance because I dont have a smog test in my area and I was wondering if this would help the car perform better, thx a lot for the help
By the way I drive a 87RS will it help at all since its a 2.8L engine

 

Here's a weird idea, and no, it's not my idea:
Disconnect the smog pump from the exhaust and reroute it into the aircleaner on a carbed engine--good idea or "functionless art"?
I've seen this on an '88 carbed Caddy engine,
but figured it was just an EPA thing. Food for thought.

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DR Stevens
Car #1:
1984 TA L69 H.O.
750 cfm Q-Jet reman. by Holley, 700R4 /w/ Superior shiftkit, 3.42 lim.slip, 4whl disc, underdrive pulleys, Accel HEI, experimental dual snorkel /w/ hood louver, some sort of weird 3" exhaust soon to be replaced
Car #2:
'91 Firebird/Formula LO3
all stock except K&N air filter (but not for long!!)