Re: BPW and Cylinder Vol.?

["Bruce Plecan" <nacelp@bright.net>]

Set the closed loop enable temp to some ridiculous number.
Grumpy

> In my case i'm starting from scratch, 468cid, single-plane port fi, cam,
heads, headers, etc.  I
> just discovered last night that lowering the injector constant has leaned
me out enough that I can
> start doing some real VE tuning.  It's doing some weird things, tho.
>
> How would u force open-loop all the time?  I suppose locking the BLM at
128 would help.
>
> Squash
>
> --- rr <RRauscher@nni.com> wrote:
> >
> > I'd put the proper values at those two location according to what is
> > really in the engine for displacement and injectors. Then use the VE
> > tables to correct the afr. If you have changed the cam, the exhaust,
> > or the intake, the ve has changed.
> >
> > For some reason, I think the cyl vol is used in the egr calcs.  ECM
> > needs to know gms/sec of airflow for egr lookups.
> >
> > You can rough in the VE tables by tuning in forced open loop, then
> > fine tune them with closed loop. Don't forget to reduce the prop
> > gains before the closed loop tuning.
> >
> > BobR.
> >
> > I've been thinking that a spin machine would be nice to get the VE
> > measured close enough. . .
> >
> > Squash wrote:
> >
> > > On AUJP/ANHT, has anyone experimented with the values at 6dd?  It is
the cylinder volume (one
> > > cylinder).  I imagine that the AFR is determined from 6dd and 41a?  If
I lower 41a only, my
> > > commanded AFR goes leaner, but i haven't tried to move 66d.  I would
imagine that they should
> > move
> > > at the same percentage.
> > >
> > > Squash
> > >
> > > =====
> > > Trains, Trucks, and EFI at
http://www.trailrunners4x4.org/users/realsquash
> > >
> >
>
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>
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