Pulsewidths & injectors & coils

[Lowell Foo]

If the Wolf works like a Haltech where you directly input pulsewidths
that only describes the resolution of the fuel table.  The ECU will
interpolate between those points down to .xxx mS.  For example
on my Motec the fuel tables range from 0-100 and my base PW
is 7mS.  That doesn't mean the ECU resolution is .07ms, it's
actually .01ms.
Also, the base PW is multiplied by MAP (actually MAP/BAP to
be exact) so for example at 35 kPa a 100 in the fuel table gives
2.45mS before other corrections and a fuel table resolution of
.0245mS.  On the other hand when I'm ripping it up at 1.4 bar
boost a 100 fuel value becomes 16.8mS with .168mS table
resolution which works just fine.  The Motec closed loop wideband
works very well and I run it all the time on the street to keep the
mixture spot on.

---- Original Message ----
Date: Wed, 13 Sep 2000 08:12:27 +0800
From: dzorde at erggroup.com
Subject: Re: Pulsewidths & injectors & coils

On my Wolf 3D you set a max injector pulse width, it looks like they use a
256 step resolution for the then set max pulse width, ie for a max 10mS
pulse width your adjustments are in increments of roughly 0.04mS.  And that
seems to work just fine.

Dan  dzorde at erggroup.com




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