[Diy_efi] WBO2 and AFR

[Michael Richards]

> So, are there ever times when ignition is knock
> limited such that combustion is not complete?
> 
> And would this tend to cause "erratic" WBO2 A/F
> readings?

In my experience I would say yes it is possible but that normally 
occurs when the engine parameters are out of balance. For example, 
compression/boost is too high and/or octane is too low. 

What you really want is a quick, efficient burn so you get the peak 
cylinder pressures where you want. Properly built and designed engines 
should achieve this. Start doing silly things like adding a 2mm head 
gasket - destroying your quench you're liable to end up with problems.

-Michael
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