Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Removing emmission control components
View Single Post
  #14 (permalink)  
Old 01-08-2011, 02:19 PM
DanielC DanielC is online now
Registered User
 
Last photo:
Join Date: Oct 2007
Location: Portland,Or
Posts: 839
Wiki Edits: 0

Thanks: 0
Thanked 43 Times in 37 Posts
The Thermactor is the air pump, fresh air into the exhaust system,
EGR is exhaust gas recirculation.

They are pretty independent of each other, but keep in mind, everything on modern engines is interrelated.
The air pump pumps fresh air into the exhaust, and it helps burn off unburnt hydrocarbons
and convert CO to CO2, in the catalytic converter.

EGR is used mainly to reduce oxides of nitrogen, from the engine. It can also be used in some conditions to reduce spark knock.
Reply With Quote