Crank trigger
Clint S.
clintsven at sk.sympatico.ca
Wed Mar 8 14:52:32 GMT 2000
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Thank you to those who responded .
I should have been a bit clearer when posting question . I have the =
nissan turbo motor originally equipped with a 3 pickup Hall sensor and =
(3) 120deg signal teeth and (90) 1 degree signal teeth . Rather than =
adapting this to my Accel DFI, I put in a normal magnetic pickup =
distributor and used a 1988 chev truck 4 wire EST igntion control module =
. The module hooked right up to the DFI and registered rpm . At this =
point the ignition and fuel should work, crank trigger is not used at =
this point .
Later on I want to go to Coil Packs and use the original crank trigger . =
I have been reading up on the Buick GN systems and they use a simular =
system on the MPFI . It uses the (3) 120deg signals, and uses 1 tooth to =
set up TDC . It looks like the Nissan had way better resolution, I don't =
know if the old ECU could react that fast . If read Clay's post =
correctly I need the (3)120deg signals and the (1) TDC synchronizing =
signal from the crank sensor .=20
Thank you for the help, my ears are open on this subject .
Clay nailed it on the head, wrote <<<<<<
Oh, you're referring to the crank sensor. And wondering about converting =
an Accel
DFI/dizzy combo to DIS? (if I read you're post right). I think your =
Accel brain
only wants the 120 degree signals. Sequential FI requires cam position, =
but DIS
will be happy with the TDC signal from the wide pulse from the crank =
trigger.
Waste spark coils firing on exhaust anyway. You'll still need to sort =
the ignition
output from the Accel into a 3 channel signal, and drive coils. Many OEM =
"modules"
do this, I mention the Ford EDIS because it is common here in the US, =
and easily
adaptable.
Not sure if I'm speaking to your question, or not.
- - Clay
<<<<<<<<<<<
=20
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<DIV><FONT size=3D2>Thank you to those who responded .</FONT></DIV>
<DIV><FONT size=3D2>I should have been a bit clearer when posting =
question . I=20
have the nissan turbo motor originally equipped with a 3 pickup Hall =
sensor and=20
(3) 120deg signal teeth and (90) 1 degree signal teeth . Rather than =
adapting=20
this to my Accel DFI, I put in a normal magnetic pickup distributor and =
used=20
a 1988 chev truck 4 wire EST igntion control module . The module =
hooked=20
right up to the DFI and registered rpm . At this point the ignition and =
fuel=20
should work, crank trigger is not used at this point .</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>Later on I want to go to Coil Packs and use the =
original=20
crank trigger . I have been reading up on the Buick GN systems and =
they =20
use a simular system on the MPFI . It uses the (3) 120deg signals, and =
uses=20
1 tooth to set up TDC . It looks like the Nissan had way better=20
resolution, I don't know if the old ECU could react that fast=20
. If read Clay's post correctly I need the (3)120deg signals and =
the (1)=20
TDC synchronizing signal from the crank sensor . </FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>Thank you for the help, my ears are open on this =
subject=20
.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Clay nailed it on the head, wrote=20
<<<<<<</FONT></DIV>
<DIV><FONT size=3D2>Oh, you're referring to the crank sensor. And =
wondering about=20
converting an Accel<BR>DFI/dizzy combo to DIS? (if I read you're post =
right). I=20
think your Accel brain<BR>only wants the 120 degree signals. Sequential =
FI=20
requires cam position, but DIS<BR>will be happy with the TDC signal from =
the=20
wide pulse from the crank trigger.<BR>Waste spark coils firing on =
exhaust=20
anyway. You'll still need to sort the ignition<BR>output from the Accel =
into a 3=20
channel signal, and drive coils. Many OEM "modules"<BR>do this, I =
mention the=20
Ford EDIS because it is common here in the US, and=20
easily<BR>adaptable.<BR><BR>Not sure if I'm speaking to your question, =
or=20
not.<BR><BR>- -=20
Clay<BR><<<<<<<<<<<<BR></FONT> </DI=
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