what is a sai?

**ConroeS4** · 01-17-2009 07:44 PM

and what does it do?

**El_Chapusca** · 01-17-2009 07:46 PM

Originally Posted by ConroeA4

and what does it do?

Side Air Intake

**mxrz** · 01-17-2009 07:51 PM

Secondary Air Injection.

http://en.wikipedia.org/wiki/Air_injection_reactor

**mattman** · 01-17-2009 10:07 PM

I thought its to help with cold starts? pulling more air into the intake...

**maclem8223** · 01-17-2009 10:09 PM

It's to help heat up the catalytic converter to operating temperature at start I thought?

**old guy** · 01-17-2009 10:12 PM

Originally Posted by mattman

I thought its to help with cold starts? pulling more air into the intake...

The SAI pumps additional air into the exhaust port at the back of the head during cold starts to provide additional oxygen to mix with the partially unburned fuel and protect the catalytic converter.

**mattman** · 01-17-2009 10:13 PM

Originally Posted by old guy

The SAI pumps additional air into the exhaust port at the back of the head during cold starts to provide additional oxygen to mix with the partially unburned fuel and protect the catalytic converter.

ahh ok! thats the part i was missing. thanks for clarifying