IAT range

[Len Sabatine]

At 01:27 PM 6/3/00 -0400, you wrote:

> >   I'm sure General Motors spent much time and effort to find the best 
> location
> > compromise for the IAT, especially on LT1 , LS1 and Vortec equipped
> > vehicles, from
> > what I can measure. Avoiding the Hype and finding the truth takes vigilance
> > on all
> > our parts . In the end , how does a change apply to a specific combination
> > of parts.
>
>In Mark's defense, I'm sure he was most likely asking about the Quad4 in
>his Beretta which does rely on speed density as its primary measure of
>intake ability, having no MAF sensor.  However, I have to agree with the
>general statement that the IAT relocation mod shouldn't make a darn bit
>of difference, or if anything, it should cause more problems than its
>worth.  If I understand correctly, the IAT relocation mod is supposed to
>place the IAT in a cooler location, thus tricking the ECM into richening
>the a/f mixture.  But, is this what we really want?  I was under the
>impression that, from the factory, most a/f mixtures are more towards
>the rich side already to keep the cat cool and reduce the formation of
>NOx, especially since the Quad4 does not utilize any measure of EGR.
>
>========================================================================
>D. Barry Stubbs                                    http://surf.to/z24man
>(912) 745-9429                                     AOL IM: thez24man
>z24man at earthlink.net          BNet Member #828     ICQ #5409648
>#101DSP MidGa Region SoloII   94 Q4 5spd Aqua Z26  88 2.8 5Spd White Z24
>----------------------------------------------------------------------------
    Yep , and throw in the "Factory" attempt to suppress detonation for 
sure, to reduce
The Q4 head gasket stress , casting cracking and  NOx. And yes, catalyst 
overheating
is also a prime consideration for many reasons. Getting the fueling correct 
beats the quick
and dirty trick stuff and promotes longer cylinder wall and valve guide 
life at the minimum.

Len


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