Pulsewidths & injectors & coils

[dzorde at erggroup.com]

That's right you set up PW numbers (in mS) for a RPM/%load table, these
values (depending on whether you set the system as TPS load, MAP load, TPS
acceleration, MAP acceleration) are then modified by temp, and these
parameters, to give you the effective PW.  There is then interpolation
between the points.

However, my point was that as you require a greater PW, the effective
resolution, I would think, would decrease slightly as there is a greater
step between the initial base numbers.

On the Haltech, I think you can set it up so you have a greater resolution
in the idle end (if desired) for a slightly coarser resolution towards the
top end where you can get away with it.

Dan  dzorde at erggroup.com

<Date: Wed, 13 Sep 2000 22:22:17 -0700
<From: "Lowell Foo" <lowell at smartt.com>
<Subject: Pulsewidths & injectors & coils
<
<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.



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