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Emissions "B" gone

Billschroeder5842

Well-Known Member
Local time
3:11 AM
Joined
Dec 14, 2013
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Location
Southlake, TX
I just replaced my thermoquad with a Demon 1901. HUGE difference in power, smoothness and drivability. I'm very happy.

The old emissions system was basically un touched on my car. However, the new carb does not have all the vacuum ports to run all the emissions equipment, so I'm going to cap and remove what makes sense.

I looked in my shop manual and the bulk of the hoses support the EGR system, which my car does not have (it is a Canadian build) or did not have when I bought.

Any ideas on what can go easily and what needs to stay? A performance boost is always nice but I do realize it is a 75.

Thanks!
 
Charcoal canister, vent lines to fuel tank and vacuum line to the carb will be the min. to keep fuel system operational. Everything else can go.
 
Thanks, that seems to make sense.

However the new carb does not have a vent for the bowl or an additional post for the vacuum.

What will not having anything do to performance or the fuel system?
 
I had 74 Plymouth. Converted it from 318 to 383 (back in the day-80's). All I did was remove the hoses between the canister and the engine, left the lines from the fuel tank intact and the hose connections at the canister open (uncapped). Never had any problems.
Originally, the fuel tank and carb bowls were vented to the canister. From there, a vacuum line to the carb sucked them out and burned them. This was to reduce hydro-carbon emissions. There is no performance loss or gain with this system (or without).
 
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