Injector Driver

Sun Mar 7 03:42:45 GMT 1999

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   =20
   =20
    Not really what I had in mind Ward, but thanks anyways!  I want to =
use this PCM to drive 4 Rochester TBI injectors instead of two, in =
delayed channel synchronous TBI mode (picture a PCM driving a 900 CFM =
Holley).   But, I would much prefer to drive the injectors as two series =
"pairs", directly via the PCM, as opposed to through the custom external =
2-4 channel P&H driver box that I have at the current time.
   =20
    That is what Howell does with their 730/Holley TBI Conversion.
    I've wired up 16 TPI injectors into 2 groups of 8, and while a =
"normal group" runs down
    to less than 1 msec. when paired 2 is erratic.  Will be dooing more =
testing on this as
    equipment appears.
       On the 749 ecm there is in fact a wiring difference that =
allowseither P+H, or Saturated
    mode.  The saturated uses just one driver, and the P+H two.
    HTH
    Bruce

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    <DIV><FONT face=3DArial size=3D2><BR>&nbsp;</DIV></FONT>
    <DIV><FONT color=3D#000000 size=3D2>Not really what I had in mind =
Ward, but=20
    thanks anyways!&nbsp; I want to use this PCM to drive 4 Rochester =
TBI=20
    injectors instead of two, in delayed channel synchronous TBI mode =
(picture a=20
    PCM driving a 900 CFM Holley).&nbsp;&nbsp; But, I would much prefer =
to drive=20
    the injectors as two series &quot;pairs&quot;, directly via the PCM, =
as=20
    opposed to through the custom external 2-4 channel P&amp;H driver =
box that I=20
    have at the current time.</FONT></DIV>
    <DIV><FONT color=3D#000000 size=3D2></FONT>&nbsp;</DIV>
    <DIV><FONT size=3D2>That is what Howell does with their 730/Holley =
TBI=20
    Conversion.</FONT></DIV>
    <DIV><FONT size=3D2>I've wired up 16 TPI injectors into 2 groups of =
8, and=20
    while a &quot;normal group&quot; runs down</FONT></DIV>
    <DIV><FONT size=3D2>to less than 1 msec. when paired 2 is =
erratic.&nbsp; Will=20
    be dooing more testing on this as</FONT></DIV>
    <DIV><FONT size=3D2>equipment appears.</FONT></DIV>
    <DIV><FONT size=3D2>&nbsp;&nbsp; On the 749 ecm there is in fact a =
wiring=20
    difference that allowseither P+H, or Saturated</FONT></DIV>
    <DIV><FONT size=3D2>mode.&nbsp; The saturated uses just one driver, =
and the=20
    P+H two.</FONT></DIV>
    <DIV><FONT size=3D2>HTH</FONT></DIV>
    <DIV><FONT size=3D2>Bruce</FONT></DIV>
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