thanks shane considering what you just said how can i fix the problem. and
get more power at full throttle diff t-stat or what.
arnold
----- Original Message -----
From: "Shane Moseley" <smoseley@ix.netcom.com>
To: <dakota-truck@buffnet.net>
Sent: Wednesday, February 28, 2001 11:08 PM
Subject: Re: DML: hello everybody (throttle) ques. for 4.7 daks
> Mark Ferrari wrote:
>
> > I dont know for sure, but my best guess is that the computer richens the
> > mixture a bit at WOT to help with cooling.
>
> It might have something to do with cooling - but I do know this: When
running -
> you are either in closed loop or open loop - I think everyone agrees on
that.
> Closed loop concerns feedback from the O2 as to what is ACTUALLY going on
re:
> Air/Fuel ratio (this is an EXTREMELY fundamental part of EVERY modern EFI
setup
> -and- most here just can't quite grasp this concept) When in open loop -
there
> is no feedback - therefore, assumptions have to be made about what kind of
> fueling (and timing) strategy to deliver to the engine under whatever
conditions
> (determined by the other sensor outputs). This is done by reading tables
and
> using the sensor outputs as indexes to these tables.
>
> The main reason for the overly rich condition is because the manufacturer
would
> rather error on the RICH side as opposed to the LEAN side of Stoich
(14.7).
> Thats it in a nutshell...
>
> Latr,
>
> Shane
>
> ps - I don't understand why this is so hard for most to believe. I have
stated
> it here about 30 times without so much as 1 single piece of evidence to
the
> contrary. It even applies to ALL engines - whether 8cyl, 6cyl, 4cyl,
> motorcycle, airplane, etc... Has anyone ever heard of "control
systems"???
>
> --
> '96
IndyRam-HisIndy-MPI/TB/Pulleys/AccelCoil/MPComp/HookerSuperComps/CompTAs
> '96 IndyRam-HerIndy-numbered(#142)"Track Truck"
> '74 Triple-Black Dodge Challenger Rallye 360 home-brew EFI R&D vehicle
> '68 Black Corvette Convertible 427 (For Sale)
>
>
>
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