Schrapnel Knob just installed - WOW!! - was [RE: gasoline prices/fuel economy]

[Peter Berrevoets]

Just plumbed in a by-pass for the WGF Valve with a pressure regulator and
added a ground to the fuel pump relay (I know - not too safe) but WOW!!!!

Using 94 Octane with an additional bottle of octane booster my 1990 200Q is
hauling some serious a$$! The mechanical pressure gauge shows 19 psi and the
in dash computer reads 2.0 BAR very quickly. Fifth gear performance has
taken a dramatic change for the better with full boost coming on at around
3000 RPM.

Combined with the earlier by-pass valve install, first and second gear come
and go real quick and the torque in fifth is simply amazing!!!

This is the dual knock sensor MC engine and I'm wondering if I'm about to
blow it up in short order. Unchipped MAC-14 and for those of you with the
accesss to your fuel pump relay, I opened it up and soldered a wire to the
T-terminal inside and then pulled it out through the top of the relay ,
crimped a spade connector on and inserted it into the 85-terminal slot that
is unused in the MAC-14 diagnostic. This gets around the overboost fuel
cut-off.

Going to post the pictures on the web site soon, but I need to know what
needs to be done to prevent this new-found power from trashing the engine...
it seems to be too good to be true... lots of power, really easily and way
too cheaply!! Without the chip modifying the mixture, what am I facing in
near immediate problems? Do I need to worry about a lean mixture? It seems
to run really smoothly and really well with good fuel economy (just put
300km on it this afternoon) Good fuel economy at heavy traffic cruise 120
kph gave me 9.8l/100km and 140 kph resulted in a 12.4l/100km. These are, of
course, trip computer readings, but it has proven to be quite accurate when
compared to actual fuel used.

One more WOW!! and then I await the "Turn it down!! You're gonna blow it
up!!" responses  ;-)

Cheers,

Peter Berrevoets
1990 200TQ
Toronto, Canada
http://frontpage.home.net/pjberr/


> >-----Original Message-----
> >From: quattro-admin at audifans.com
> >[mailto:quattro-admin at audifans.com]On
> >Behalf Of Swann, Benjamin R. (BSWANN)
> >Sent: Friday, April 20, 2001 5:40 PM
> >To: 'Larry C Leung'; t44tq at mindspring.com
> >Cc: Swann, Benjamin R. (BSWANN); lee at wheelman.com;
> >quattro at audifans.com
> >Subject: RE: gasoline prices/fuel economy
> >
> >
> >Oh, a couple more more things - I always run 93/94 Octane.
> >
> >My timing is also a tad advanced over stock map due to
> >combined chip(QLCC)
> >and resistor(set for 4kohm - played with this and found to
> >be optimal).
> >This combination allows me to get 18psi boost which I have
> >dialed in by
> >regulator (aka. Schrapnel knob).  Any more advance/lower
> >resistor value or
> >boost/via knob and there might be detonation.
> >
> >Car is kept in perfect tune.  Oil change every 5kmi with
> >Castrol Syntec 5w50
> >and OEM filter.
> >
> >Summer economy is generally better than winter economy,
> >except on long trips
> >with engine warmed up, then it is the other way around.
> >Best economy and
> >performance is in rain or heavy fog = water injection?
> >
> >Ben
> >'87 5kcstqw - will be posting some more pictures soon of
> >knob setup and
> >other mods.
> >-----Original Message-----
> >From: Larry C Leung [mailto:l.leung at juno.com]
> >Sent: Thursday, April 19, 2001 10:43 PM
> >To: t44tq at mindspring.com
> >Cc: BSWANN at arinc.com; lee at wheelman.com; quattro at audifans.com
> >Subject: Re: gasoline prices/fuel economy
> >
> >I do only a little better than you Taka, about 20 MPH around
> >town, and,
> >as I recently posted, 25 on a 150 mile milk run trying to be
> >frugal (65
> >MPH, boost 1.0 or less). I don't get it either. (I did check
> >and winter
> >fuel is still in effect aound here.
> >
> >LL - NY
> >
> >On Thu, 19 Apr 2001 20:17:23 -0400 "TM"
> ><t44tq at mindspring.com> writes:
> >>I don't know how you all do it- my 5ktq gets about 17.5 mpg
> >>in daily driving, the 200q about 19 mpg. They both are around 22-23
> >>mpg
> >>on the highway.
> >>
> >>Maybe I drive a lot faster and a lot more into the boost than you.
> >>Then again, I've cruised at 85-95 mph on the highway at times as
> >>well.
> >>In Germany, on an unrestricted autobahn, of course. :-)
> >>
> >>Taka
> >