Re: Crank Fire?

[Mike Zamikhovsky <MikeZ755@sprintmail.com>]

Graydon D. Stuckey wrote:
> 
> On Sat, 3 Jan 1998, Mike Zamikhovsky wrote:
> 
> > How about separate crank trigger?
> >
> Mike,
> 
>         That's what I did on my EFI system for the 5KCSTQ.  I put an
> aluminum wheel on the cam pulley, and placed 4 magnets 90 deg apart on the
> circumference of the wheel.  These triggered a hall effect sensor which
> then sends 2 pulses per engine revolution to the ECU(don't forget, the cam
> turns half engine rpm.) I am running 4 cylinder software, so that's why I
> need 2 pulses and not 2.5.  Since my EFI system is a simultaneous fire
> system which does not sequence the injector firing, it works just fine.
> 
> Later,
> Graydon D. Stuckey
> New cool .sig file in the works...


My Electromotive has a simular wheel with 72 teeth. One tooth is misssing 
as reference pt. I had to machine the crank pulley to attach it in 
correct position relative to the trigger. They clame more accurate firing 
at high RPM do to absence of belt slack. The trigger also required custom 
bracket. My instalation was on Toyota which has even less space around 
crank pulley. It was tight. I also had to protect it from rally debri 
with urethane  covers.

Mike Z