weird o2 sensor readings? (mc'd urq)

[Nate Stuart]

> the only thing i'd say to this is that the actual flow of gas is
> going to be proportional to the amount of air coming in through the
> plate, not the throttle body...  there will be a drop in pressure (or
> increase of vacuum) for a split second until the air fills the gap
> there, but that would create a temporary rich-running condition, imo,
> if anything...

Right, there is a pressure drop, but it is in the intake tract before the
throttle plate. There is an equal pressure 'boost' relative to the
previous pressure level inside the IM (post TB), until these pressures
equalize across the entire intake system, and the low pressure 'wave'
reaches the CIS flow plate. In that brief period of time you have more
pressure at the intake valves (shorter path to the valves, than to the
metering plate), therefore more air getting into combustion chambers
before the CIS plate moves to provide more fuel. I have no physics or
fluid dynamics background, this is just my visualization of what happens.

I really don't have a decent way to explain what it is I'm theorizing
here, so like I said feel free to flame away on this, and I'll try and
describe my thoughts differently.

-Nate
'89 90tq
www.newtsplace.com/0-tq