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Air pump removal

nickclark59

nickclark59

New member
has anyone disconnected their air pump?
is there any disadvantage in removing it as to MOT emissions etc and any advantages on performance?
 
Mine was removed when I had my engine rebuilt on the advice of the guys at RPM, who know what they're talking about. Agree it's not noticeable, but the received wisdom is it was taking 5% of the engine's power.

They were here only put on to pump air into the exhaust as it left the car to dilute it so it could pass California standards at the time. Logically though, if it's using energy, it's using fuel, so the net effect must be more emissions in total. Bonkers device: bin it. You owe it to the planet. ??
 
Not to mention weight reduction where it's most needed - and if you've got an air-con compressor as well, bin that. Result!
 
BTW, the air pump not really about "diluting the exhaust gases"; According to "Scientific Design of Exhaust & Intake Systems" 3rd Ed. published in 1972 the technique aims to complete the partial combustion of hydrocarbons and carbon monoxide before it gets into the atmosphere. It has been used by General Motors, BL and Toyota as well as Porsche. I don't know if anyone still uses this method, though.

 
Not the manifold - the cylinder heads where the air injectors project into the exhaust port.

Will post a pic if I can work out how to.


 
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