OK guys, school me IAT, boost, O2

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Oct 20, 2004 | 02:49 PM

texlurch

Thread Starter

Registered User

Joined: Feb 2002

Posts: 702

From: Houston, TX USA

OK guys, school me IAT, boost, O2

Just did a little test and log on my motor..showing 16.3 psi on the map sensor...

IAT........O2 reading......Boost......Timing

110..........806...............0.............35

158.........777-.798........16.3..........18**

So under boost I am gaining around 50 deg temp..

My IAT sensor is on the y-pipe just in front of the TB, timing is being retarded via MSD6BTM, so that is an approx (actual log was 34, minus 16 for the 1 lbs/boost I have it set at**)

I am not up to date on the O2 numbers, what does that equate to? My in dash A/F gauge stays towards the rich side under power.. still need to hook up a wideband and see what is up.

Driveability is good, goes from -10 vac to +15 boost just about as quick as I can hit the throttle, while cruising about 45-50...

Thoughts?

Last edited by texlurch; Oct 20, 2004 at 02:50 PM. Reason: make it read better

Oct 20, 2004 | 08:26 PM

engineermike

Registered User

Joined: Mar 2002

Posts: 2,743

From: Baton Rouge, LA, USA

Re: OK guys, school me IAT, boost, O2

Don't put any faith in the narrow-band O2 readings.

The IAT's look good, but I don't think the sensor is very accurate at the higher temps either.

Mike