hall sensor on a '85 4kq? (5 window type?)

[Orin Eman]

> Quoting Orin Eman <orin at drizzle.com>:
>
> > > I'm still researching the ignition timing reference pin location for
> > my
> > > engine management system conversion.  I supposed I've
> > > determined that the pin is located 62 degrees BTDC for cylinder
> > > number 1 (?).
> >
> > Correct, 63 BTDC on cyl 1.  135 teeth on the flywheel.
>
Typo.  It's 62.

> I just have to figure out how to use that part of the 4kq system along with the long block of the MC-1 motor.
>
> > > I remember the NF/NG system is preferred over the 4kq system,
> > > but that's because of the knock sensor.  My engine management
> > > system will have one or two knock sensors of it's own, so that's not
> > > important to me.  However, if it is a 5 window hall sensor as well,
> > > then I may be all set.  Anyone know?
> >
> > A good knock control system will need to determine the compression
> > stroke on cyl 1.  Better make sure you can do that with the 5 window
> > sensor along with the timing pin.  You need to know what cyl is firing to
> > determine which sensor to listen to, as well as what scaling to apply to
> > the knock signal.

> Does anyone care to comment on where I would splice into the hall sensor to connect it to the standalone ECU?

Depends where that ECU is.  You can splice in close to the sensor or at the
original ECU.

Orin.