Ignition retard knock sensor.

[Gary Derian]

> > What is the exhaust pressure while you are cruising at 5 psi
> > boost, both before and after the turbo?
>
> I have no idea.  I haven't seen pressure gauges for exhaust.  Can you
> just use standard boost gauges with a good bit of metal tubing (like
> maybe several feet) tapped to the manifold and down pipe to allow the
> gas to cool before reaching the gauges?

Yes.  Any old pressure gauge will do.  An old Vacuum/fuel pressure gauge or
something.  There is no flow of exhaust in the connecting tube.  Only 1/2 to
1 foot is enough metal tubing.

Gary Derian <gderian at oh.verio.com>