catalytic converter question
Thread Starter
Heel & Toe
Joined: Sep 2017
Posts: 16
Likes: 1
From: Boise Idaho
catalytic converter question
I had and idea and wanted to know if anyone knows if it exists, in my state (Idaho) the law is that if your car is a 1981 or newer it has to tested for emissions. Idaho is pretty relaxed about enforcement of a cars noise and what not, but when it comes to emissions if you fail testing you get your registration taken away and you have to pay for it again. Emissions testing is every 2 years.
My idea is a quick detach catalytic converter that would be able to be put on in less than an hour without any real tools. Whenever the car is being driven normally the catalytic converter would be off and a pipe would carry the exhaust fumes back without any restrictions other than the muffler, then when it comes time to test it would be easy to put the stock catalytic converter on.
Does anyone know if there is a product like this? has anyone done this? Would it work if i just used flexible pipe and clamps?
My idea is a quick detach catalytic converter that would be able to be put on in less than an hour without any real tools. Whenever the car is being driven normally the catalytic converter would be off and a pipe would carry the exhaust fumes back without any restrictions other than the muffler, then when it comes time to test it would be easy to put the stock catalytic converter on.
Does anyone know if there is a product like this? has anyone done this? Would it work if i just used flexible pipe and clamps?
Intermediate
Joined: Aug 2012
Posts: 27
Likes: 1
Is everyone really this much against cats now? I can understand not wanting them on a track car, or not wanting to spend money if you don’t have cats and your exhaust is fine otherwise. I would think on a street car performance effects would be negligible with modern cats. I doubt you’d have trouble passing inspection either way as long as your corvette doesn’t roll coal or sound like a frieght train.
Thread Starter
Heel & Toe
Joined: Sep 2017
Posts: 16
Likes: 1
From: Boise Idaho
Is everyone really this much against cats now? I can understand not wanting them on a track car, or not wanting to spend money if you don’t have cats and your exhaust is fine otherwise. I would think on a street car performance effects would be negligible with modern cats. I doubt you’d have trouble passing inspection either way as long as your corvette doesn’t roll coal or sound like a frieght train.
2026 Loser of the Year
Joined: Sep 2013
Posts: 36,579
Likes: 7,020
From: New Or-leens Loo-z-anna
FYI:
I installed true dual exhaust and two "mini-cats" (each one rated for 3.0L engine) on my 350 cu.in. streetrod. No problem passing the emission test. I didn't notice any loss of power, but the previous bad exhaust odor went away completely.
I installed true dual exhaust and two "mini-cats" (each one rated for 3.0L engine) on my 350 cu.in. streetrod. No problem passing the emission test. I didn't notice any loss of power, but the previous bad exhaust odor went away completely.
Thread Starter
Heel & Toe
Joined: Sep 2017
Posts: 16
Likes: 1
From: Boise Idaho
Alright I may do this... may just get my cata from some junkyard datsun or something else with a small motor
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
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From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
Put in a "test" pipe when the cat is removed. Easy to do. Just put flanges on the pipe ends and bolt in. Same for your cat. Or just put in a high flow cat.
