Re: BPW and Cylinder Vol.?

[Squash <realsquash@yahoo.com>]

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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=====
Trains, Trucks, and EFI at http://www.trailrunners4x4.org/users/realsquash

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