Blow off valve vs. By-pass valve (semantics aside)

[Jörgen Karlsson]

> There are cars that do behave badly to a blowoff and need computer
> modification to work with a blowoff, I know that some Nissan
> Skylines do...
> In this case it is a lean condition right after the shift that is the
> problem, the engine management overcompensates for the rich o2 reading
> during the shift.

After todays experiences at the track I know that Nissan Silvias (200zx over
here) don't work well with a blowoff either...