IAT placement

[Dave Zug]

you'd figger they would have "poor location" based corrections built 
into the conversion curves, or compensations for the skewed 
temperatures built into the calc's. anything is possible. when 
presented with a poor location and management says "deal with it, we 
aint making another casting for you"{MBA's HAH!} there are still ways 
of using engineering principles and code to compensate. My experience 
is in the HVAC controls world.. they call it "value engineering".

> Date:          Fri, 29 Oct 1999 07:25:57 -0700 (PDT)
> From:          Squash <realsquash at yahoo.com>
> Subject:       Re: IAT placement
> To:            gmecm at efi332.eng.ohio-state.edu
> Reply-to:      gmecm at efi332.eng.ohio-state.edu

> Since I haven't had my foot in my mouth since
> yesterday, here goes...
> 
> If the factory setup used a manifold hole for IAT,
> then i would think you'd want it in there because the
> factory calibration would be closer.  But if you plan
> on tweaking tables and stuff anyways, I'd put it right
> before the throttle body.  Does anyone have any
> running numbers for IAT on differing applications?  My
> engine compartment gets so hot that the sensor is hot
> to the touch anyways, even though the incoming air is
> not that hot.
> 
> Squash
> 
> > > > >What's the collective thought on placement of
> > the IAT sensor?
> > > > >
> > > > >On the TPI the IAT was originally in the
> > manifold; on my setup I can put it
> > > > >either in the airstream ahead of the throttle
> > body, or I can drill & tap a
> > > > >hole in the intake for it.   Obviously, the
> > first is the easier method.
> > > > >
> > > > >I would think that a sensor in the manifold
> > would read a few degrees higher
> > > > >due to heat transfer from the motor into the
> > intake, and the ECM might take
> > > > >this into account (or vice-versa).
> > > > >
> > > > >
> > > > >--> Bob Valentine
> > > > >--> bob at tecmark.com
> 
> 
> =====
> 
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~~~
Dave Z. www.delanet.com/~tgp