Catalytic Converters? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**truckster** · 01-25-2021, 11:11 PM

Have any of you added catalytic converters to your Blazer to reduce exhaust odor when you're running without the top? I'm thinking about it and wondering how well it worked for you. I have 2.5" dual exhaust exiting behind the rear wheels and my carb and timing are properly adjusted.

Thanks.

hemi43 · 01-26-2021, 08:50 PM

What engine are you using? You can't just put catalytic converters on and expect them to last especially with a carb. They need oxygen to work either by the use of an air pump or one way valves that suck air into the exhaust.
The best thing you could do is get rid of the antiquated carbureted engine and install something late model. At the very least, get rid of the carb and get fuel injection.

01-25-2021, 11:11 PM	#1
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,794	Catalytic Converters? Have any of you added catalytic converters to your Blazer to reduce exhaust odor when you're running without the top? I'm thinking about it and wondering how well it worked for you. I have 2.5" dual exhaust exiting behind the rear wheels and my carb and timing are properly adjusted. Thanks. __________________ I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson

01-26-2021, 08:50 PM	#2
hemi43 Registered User Join Date: Mar 2015 Location: Ontario Canada Posts: 1,499	Re: Catalytic Converters? What engine are you using? You can't just put catalytic converters on and expect them to last especially with a carb. They need oxygen to work either by the use of an air pump or one way valves that suck air into the exhaust. The best thing you could do is get rid of the antiquated carbureted engine and install something late model. At the very least, get rid of the carb and get fuel injection.



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