[Diy_efi] Re: MoTeC for Mini Couper w/ siamese ports

[Phil]

seems you need a 720* cycle, 4 injection events (every 180*) that can 
provide full load fueling  @3.0uS open time (signal duration will be 
slightly longer) AND can operate to very small durations for idle/low 
load-maybe some crazy combination including computer controlled fuel 
pressure; I don't have numbers, but I belive tripling pressure about doubles 
delivery-at least w/D Jet injectors.
----- Original Message ----- 
From: <bhpdev at juno.com>
To: <philhunt at comcast.net>
Sent: Wednesday, January 03, 2007 9:29 AM
Subject: Fw: MoTeC for Mini Couper w/ siamese ports


>
>
>               bhp  1484 concord ln  bethlehem, pa 18015
>
>
> too early for me to fully process but I'm thinking no- what ya think?
> bob g.
>
> --------- Forwarded message ----------
> From: Simon Wagner <simon at motec.com>
> To: bhpdev at juno.com
> Date: Tue, 02 Jan 2007 16:10:29 -0800
> Subject: MoTeC for Mini Couper w/ siamese ports
> Message-ID: <459AF475.9030909 at motec.com>
>
> Hello Bob,
>
> When running the engine on a 360 cycle (all fueling events are completed
> for the entire cylinder count once per rev) the Motec ECU will fire it's
> four outputs in the following manner. The first and second output will
> fire and then 180 degrees later the third and fourth outputs will fire.
> There would be four ignition events per 720 degrees for the distributor
> as well. You have the ability to define the injection timing (when in
> crank degrees before TDC) at which the groups will fire. The injection
> timing will be the same for each group and can not be made different for
> each group. So if you specify that you would like the end-of-injection
> point to be at 270 degrees before TDC then  the first group will deliver
> it's fuel.
>
> 270 BTDC fuel pulse ends for outputs 1&2 end
> 90 BTDC fuel pulse ends for outputs 3&4 end (270 before the other TDC)
>
> Typically you would connect the injector outputs in firing order:
>
> output 1 = cylinder 1
> output 2 = cylinder 3
> output 3 = cylinder 4
> output 4 = cylinder 2
>
> Assuming we wire in this manner this means the intake runner to 1/2
> would have injector outputs 1 and 4 while intake runner 3/4 would have
> injector outputs 2 and 3. For the above timing and wiring, this would
> place fuel events in both the 1-2 runner and the 3-4 runner at 270 BTDC
> and likewise the 90 BTDC would also have both runners getting a fuel
> pulse. This would happen every 360 degrees.
>
> Meanwhile the ignition system would be running normally and you'd have
> full control of the advance curve.
>
> Does this sound like an acceptable solution?
>
> -- 
> Simon Wagner
> Motec Systems USA
> 5355 Industrial Drive
> Huntington Beach, CA 92649
> TEL: (714) 897-6804 x 161
> FAX: (714) 230-3075
>
>
>
>