> Erik Quackenbush wrote:
> >
> > Yes, the engine management computers on modern engines with forced
> > induction do retard the timing under boost.
Joe Curry wrote:
> They have to. Otherwise you would get detonation as the effective
> compression ratio is increased with the applied boost.
Another way to look at this is that the boost-retard extends the vacuum
advance curve into positive manifold pressure.
Randall
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