[Diy_efi] Engine Tuning system, "The Australian" Wed June 14, 2006

[TheEthereal at gmx.net]

IMHO trying to keep vacuum in the manifold as low as possible is the best method for saving fuel. As most cars have a MAP sensor, observing the pressure shouldn't be that difficult. Toyota did that on some of their older cars w/ an red/green indicator light. Still, drivers that stomp on the accelerator even though the light 100 yards in front of them hast just gotten red are wasting morge fuel than any ECU, no matter how good or bad it's designed.

-------- Original-Nachricht --------
Datum: Fri, 16 Jun 2006 02:00:08 -0400
Von: Daniel Nicoson <A6intruder at myo-p.com>
An: diy_efi at diy-efi.org
Betreff: RE: [Diy_efi] Engine Tuning system, "The Australian" Wed June 14, 2006

> Quite honestly I haven't seen too many articles of that length that use
> the
> word "actually" so much!  I thought it was my 15 year old using the word
> "like"...
> 
> Snake oil.  I only read the first link.  Whoever is posing as the
> "information" man doesn't have much grasp on what a modern ECU is capable
> of
> doing in the tuning department.  I suspect that most of the
> US/European/Asian automotive engineering staffs are quite aware that there
> are torque meters available that could work in an automotive drive train. 
> I
> would suspect they use those in some of their testing.  The fact that they
> don't use them on production vehicles probably means there is not much to
> be
> gained.  They don't give up much these days when it comes to making a car
> efficient and "clean".
> 
> I'm not saying someone can't find ways to get better mileage or even
> cleaner
> emissions but based on the first link's discussion, I don't think that
> group
> is going to make huge improvements with a torque meter and another
> feedback
> loop.
> 
> I wouldn't mind if they prove me wrong but I doubt they will.
> 
> My $.02
> 
> Dan Nicoson
> 
> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
> Behalf Of Gary Spooner
> Sent: Friday, June 16, 2006 1:33 AM
> To: diy_efi at diy-efi.org
> Subject: RE: [Diy_efi] Engine Tuning system, "The Australian" Wed June 14,
> 2006
> 
> *....Because when you actually drive your vehicle out of a showroom, the
> vehicle has been set up with these static maps. Now these static maps have
> been developed to mimic the conditions that are expected to be placed on
> the
> car, so the temperature, the speed, the revs per minute, these conditions
> are all built into these static maps. So once you drive out of the
> showroom,
> your car then starts to deteriorate as you drive.....*
> 
> CHOP!
> 
> The only automotive computers incapable of making fine adjustments to fuel
> and ignition curves are controls modules which did not come equipped with
> closed loop monitoring and that type of engine controller were mounted in
> cars manufactured in the early 70's. This may be a snow job!
> 
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