--- James Blumenfeld <[email protected]> wrote:
> Date: Tue, 2 Oct 2001 11:48:55 -0700 (PDT)
> From: James Blumenfeld <[email protected]>
> Subject: rpm dependent fuel enricher
> To: [email protected], [email protected]
> 
> Brian,
>    I built for my 87 gti 16v a rpm dependent fuel
> enricher.  I used a RPM switch (also used for a
> shift
> light) from racer parts wholesale ($49.95).  When
> the
> revs go over 4800 (adjustable) the switch gives a
> ground trigger; this goes to one side of the relay
> coil .  The other side of the coil goes to the full
> throttle switch.  When the revs are above 4800 AND
> the
> full throttle switch is activated the relay will
> trip.
>  I then wired the relay so that when tripped it puts
> a
> 1500 ohm resistor into the circuit.  I then
> paralleled
> this resister with a 10k potentiometer that is
> mounted
> on the dash (in one of those blanks by the radio). 
> In
> this way I can tweak the mixture from the dash.  In
> my
> car I found that the 1100 ohm value was too high. 
> Also if you tweak the setting on the fuel
> distributor
> your 1100 ohm value may no longer be correct.  (The
> red knob on the dash looks cool too).
>    Back in the day (when I had hair) racers would
> put
> a potentiometer into the dash temp control so that
> they could adjust the mixture whilst racing.
> 
> James Blumenfeld
> 87 gti
> (ex ITA, Firehawk, ProRally & enduro karter)
> 
> 
> 
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