quattro digest, Vol 1 #4526 - factory instrumentation accuracy & mpg (OMIGOSH remembered this time!)

[Larry C Leung]

FWIW,

I'm totally impressed by those whom seem to regularly get 28 MPG or so
with
their 10VT type 44Q's. Most of the time, on the highway (Thruway in this
case)
I'm happy if I get 24, usually get 22, and I'm not going great guns (75
isn't all
that fast in this case). I attribute this to the fact that it has rolling
hills, but
overall this car can't seem to match my low powered, low flying red brick

4KQ over slightly flatter terrain, which regularly got 27 MPG. If I have
mixed
driving in this area, all I get is about 20 MPG. The car's fuel milage
really
didn't change with the chip though, so I don't think it's the chip's
fault in your
case Ben. In any event, I'd be willing to bet, since you ended up
travelling in
the same terrain as I live in (if there was really time, I would've
suggested
all of us meeting together, but I did have other plans, and I know that
Taka
was busy, and Chi is ALWAYS busy), that the rolling hills would've had
some effect, and if the thermostat was stuck open, you're lucky in this
cold to have gotten any form of reasonable fuel milage.

As for all of you whom are getting mid-high 20's with your chipped type
44
turbos, where do you live, and how do you get that kind of milage?

LL - NY


> Date: Sun, 26 Jan 2003 20:20:35 -0500
> From: Dan Simoes <dans at audifans.com>
> To: ben swann <benswann at comcast.net>
> Cc: flyboysteve at usa.com, quattro at audifans.com, 200q20v at audifans.com
> Subject: Re: re. factory instrumentation accuracy & mpg
>
>
>
> ben swann wrote:
> >
> > Yes - peeve # 2 on the new aquisition of the '91 200 20v tq avant.
>  Has
> > SJM chip with 2.5 bar pressure transducer AFAIK.
>
> Lehmann stage 1 chip with 2.5 transducer.
>
> > Gas mileage abysmal
> > on the way home - 20MPG and no I was not easy on the gas and
> probably
> > averageing over 70.  My '87 5000 tq would get an easy 28 mpg under
> the
> > same conditions.  I thought Motronic was supposed to be superior
> at
> > engine management, including economy, over CIS (CIS/motronic).
>
> I thought I told you that I asked SJM about this and he correctly
> diagnosed a failing tstat.  That's the reason the mpg is low.
>
> > [Does anyone know how the driving computer arrives at the number
> it
> > alls average MPG?  It definately has NOTHING to do with actual
> fuel
> > flow!  Does it do it's calcs based upon stored parameters and
> ideal
> > situation testing done at the factory?  Is there any way to
> recalibrate
> > it?
>
> The computer is balls on accurate at the moment.  Leave it alone.
>
> Am I gonna have to get down there and bring this poor car back? :)
>
> Spend some time on SJM's site and the list archives for 200q20v,
> and
> you'll be well enlightened.
>
>