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

[JShadzi at aol.com]

I say if anything is severely wrong, pistons and valves will start failing, those cast aluminum pistons just don't hold up to the heat like cast iron does.  It is all about fuel mixture, thought, and any failures will stem from a lean one.
Javad

In a message dated Sat, 21 Apr 2001  2:57:16 PM Eastern Daylight Time, Jörgen Karlsson <jorgen.m.karlsson at homese> writes:

<< You are stretching the limits now, I don't think that your fuelling is
sufficient for more then 13 psi. Check the plugs to try to determine mixture
and combustion temperature, don't trust your eyes if it looks safe...

You definately need an EGT gauge now!

Anyone want to bet on what he breaks first?
My bets are warping the exhaust manifold and pulling a  few studs...

Jörgen Karlsson
Gothenburg, Sweden.



> -----Original Message-----
> From: Peter Berrevoets [mailto:pjberr at home.com]
> Sent: Saturday, April 21, 2001 6:24 AM
> To: 'Swann, Benjamin R. (BSWANN)'; JShadzi at aol. com (E-mail); 'Jorgen
> Karlsson'
> Cc: 1 Quattro List (E-mail)
> Subject: Schrapnel Knob just installed - WOW!! - was [RE: gasoline
> prices/fuel economy]
>
>
> 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/
>

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