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Re: curious about sfi
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will it work well for large injectors at idle(40.7#@39psi) on a 350/350 =
overcammed.( my curiosity may be getting the better of me). not sure yet =
if emissions are an issue..kinda depends on how it gets titled.
I understand that above 3000rpm I wouldn't be able to tell the =
difference between sfi and batch. If however the circuitry is relatively =
inexpensive..why not? I believe the caddy(olds) distibutor would be =
fairly easy to adapt a cranksensor to(it has an extra 'speed' sensor =
location).
Swayze
mswayze@truswood.com
kswayze@bellsouth.net
----- Original Message -----=20
From: nacelp=20
To: gmecm@DIY-EFI.ORG=20
Sent: Monday, February 28, 2000 10:38 AM
Subject: Re: curious about sfi
Might work for idle, but how are you going to hande 80% duty cycles. =20
Other then for large injectors at idle, and some min emission stuff, =
why bother (asked rhetorically, been covered before)?.
Grumpy
----- Original Message -----=20
From: Mike Swayze=20
To: GMECM=20
Sent: Monday, February 28, 2000 9:23 AM
Subject: curious about sfi
this may be dangerous thinking but;
since I will probably need to install an injector driver anyway
would it be possible using the pulse from the '727 injector driver =
circuit in the ECM to control a 'black box' SFI injector circuit synched =
using a crank sensor. I had read that the old volkswagon FI was static =
at 15deg B4 the intake opening. what I am curious about is =
"multiplexing?" the pulse from the existing driver and "synching" it =
with the crankshaft sensor. would some of the DIS circuitry be able to =
do this?
anybody out there been dere,done dat?
Swayze
mswayze@truswood.com
kswayze@bellsouth.net
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<DIV><FONT face=3DArial size=3D2>will it work well for large injectors =
at=20
idle(40.7#@39psi) on a 350/350 overcammed.( my curiosity may be getting =
the=20
better of me). not sure yet if emissions are an issue..kinda depends on =
how it=20
gets titled.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>I understand that above 3000rpm I =
wouldn't be able=20
to tell the difference between sfi and batch. If however the circuitry =
is=20
relatively inexpensive..why not? I believe the caddy(olds) distibutor =
would be=20
fairly easy to adapt a cranksensor to(it has an extra 'speed' sensor=20
location).</FONT></DIV>
<DIV>Swayze<BR><A=20
href=3D"mailto:mswayze@truswood.com";>mswayze@truswood.com</A><BR><A=20
href=3D"mailto:kswayze@bellsouth.net";>kswayze@bellsouth.net</A></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A href=3D"mailto:nacelp@bright.net"; =
title=3Dnacelp@bright.net>nacelp</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
href=3D"mailto:gmecm@DIY-EFI.ORG"=20
title=3Dgmecm@DIY-EFI.ORG>gmecm@DIY-EFI.ORG</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, February 28, 2000 =
10:38=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: curious about =
sfi</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3D"MS Sans Serif">Might work for idle, but how are you =
going to=20
hande 80% duty cycles. </FONT></DIV>
<DIV><FONT face=3D"MS Sans Serif">Other then for large injectors at =
idle, and=20
some min emission stuff, why bother (asked rhetorically, been covered=20
before)?.</FONT></DIV>
<DIV><FONT face=3D"MS Sans Serif">Grumpy</FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; =
MARGIN-RIGHT: 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A href=3D"mailto:mswayze@truswood.com"; =
title=3Dmswayze@truswood.com>Mike=20
Swayze</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
href=3D"mailto:GMECM@DIY-EFI.ORG"=20
title=3DGMECM@DIY-EFI.ORG>GMECM</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, February 28, =
2000 9:23=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> curious about =
sfi</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>this may be dangerous thinking=20
but;</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>since I will probably need to =
install an=20
injector driver anyway</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>would it be possible using the =
pulse from the=20
'727 injector driver circuit in the ECM to control a 'black box' SFI =
injector circuit synched using a crank sensor. I had read that the =
old=20
volkswagon FI was static at 15deg B4 the intake opening. what I am =
curious=20
about is "multiplexing?" the pulse from the existing driver and =
"synching"=20
it with the crankshaft sensor. would some of the DIS circuitry be =
able to do=20
this?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>anybody out there been dere,done=20
dat?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Swayze<BR><A=20
href=3D"mailto:mswayze@truswood.com";>mswayze@truswood.com</A><BR><A=20
=
href=3D"mailto:kswayze@bellsouth.net";>kswayze@bellsouth.net</A></FONT></D=
IV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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