Removing SMOG equipment?
Thread Starter
Advanced
Joined: Mar 2007
Posts: 74
Likes: 0
From: Sacramento California
Removing SMOG equipment?
Question? I have un-wanted / Un-needed smog equipment on my engine, are there any ill side effects of removing said equipment without pluging holes in exhaust manifold, besides sound from exhaust? Or any other parts of engine, or tuning?
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
You really don't want exhaust fumes in the engine compartment, as they will work their way into the cabin air vent system and kill occupant brain cells. Can you pass your state inspection requirements without the pump system? Can you sell it to someone else without it? If you still want it off, pull it...but keep the components for later use [or resale]. I would think you could tap the holes for set screws (installed with anti-seize compound) or even fill them with JBWeld metal/epoxy.
Thread Starter
Advanced
Joined: Mar 2007
Posts: 74
Likes: 0
From: Sacramento California
You really don't want exhaust fumes in the engine compartment, as they will work their way into the cabin air vent system and kill occupant brain cells. Can you pass your state inspection requirements without the pump system? Can you sell it to someone else without it? If you still want it off, pull it...but keep the components for later use [or resale]. I would think you could tap the holes for set screws (installed with anti-seize compound) or even fill them with JBWeld metal/epoxy.
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
Jesus, your going to need a fire extinguisher a lot sooner than worry about some drunk brain cells
1. Take out the pump and its associated plumbing and plug the manifold holes, OR, Bubba would put a plug on the check valve
2. Take it to the car wash with a latge bottle of Simple Green and clean everything under the hood.
3. Paint the crappy looking compressor, valve covers, Intake etc..
4. clean the overspray off the overflow bottle
1. Take out the pump and its associated plumbing and plug the manifold holes, OR, Bubba would put a plug on the check valve
2. Take it to the car wash with a latge bottle of Simple Green and clean everything under the hood.
3. Paint the crappy looking compressor, valve covers, Intake etc..
4. clean the overspray off the overflow bottle
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
Your engine was designed to run with all the smog equipment, so its tuned to run with it. If you just start pulling hoses and capping all the equipment, I would not be surprised if you experience any problems. When I bought my '75, all the smog equipment was disconnected. Maybe it was subconcious, but I felt the car ran better when I reattached it all properly, especially in terms of gas mileage.
Someone with way more knowledge will give you good details, but I'll tell you I'm nixing the entire set up and going with a rebuild.
Someone with way more knowledge will give you good details, but I'll tell you I'm nixing the entire set up and going with a rebuild.
Pro
Joined: Mar 2007
Posts: 738
Likes: 9
From: Fallbrook CA
Removing the smog equipment will do very little, if anything to improve your performance. The mid 70's 350 motors were all down on HP. I'd rebuild the motor with all the goodies (heads, cam, intake, carb, etc) or put a crate motor in it. At that point, the smog stuff can come off. I'd follow my own advise but I have a 76' model that still get CA inspected so I have to keep mine fairly stock. Take advantage of your exemption!
Also....clean that mess up under the hood while your at it....palamesa
Also....clean that mess up under the hood while your at it....palamesa
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Thread Starter
Advanced
Joined: Mar 2007
Posts: 74
Likes: 0
From: Sacramento California
Jesus, your going to need a fire extinguisher a lot sooner than worry about some drunk brain cells
1. Take out the pump and its associated plumbing and plug the manifold holes, OR, Bubba would put a plug on the check valve
2. Take it to the car wash with a latge bottle of Simple Green and clean everything under the hood.
3. Paint the crappy looking compressor, valve covers, Intake etc..
4. clean the overspray off the overflow bottle
1. Take out the pump and its associated plumbing and plug the manifold holes, OR, Bubba would put a plug on the check valve
2. Take it to the car wash with a latge bottle of Simple Green and clean everything under the hood.
3. Paint the crappy looking compressor, valve covers, Intake etc..
4. clean the overspray off the overflow bottle
Your engine was designed to run with all the smog equipment, so its tuned to run with it. If you just start pulling hoses and capping all the equipment, I would not be surprised if you experience any problems. When I bought my '75, all the smog equipment was disconnected. Maybe it was subconcious, but I felt the car ran better when I reattached it all properly, especially in terms of gas mileage.
Great! It would be nice to make some money off this car rather then dump money in, I will sell the equipment when I take it off, I will also sell the Steering wheel too, '78 25th anni wheel.
Drifting
Joined: Aug 2006
Posts: 1,694
Likes: 0
From: Oregon
Since you live in Sacramento, own a 74, and want to rid yourself of the smog crap, you are in luck. Unless the Governator Arnold makes the 75 and older cars return to the bi-anual smog checks, you can do alot. Use the smog tubes and PLUG them. New non EGR Manifold and a few other things that the Kolofornia Smog natzis have required on your car and you will have a good runnung 350 with alot more power. You have so many options that the 76 and newer Vette owners don't have in Calif... ENJOY your Freedom!
