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

[Phil]

One of Bob's interesting ideas: 2 fuel rails and pressure regulators for 
rich and lean pairs of cylinders to fine tune a sequential arrangement-not a 
perfect solution, maybe a perfectly practical one!!??  phil
----- Original Message ----- 
From: "Phil" <philhunt at comcast.net>
To: <bhpdev at juno.com>
Cc: <diy_efi at diy-efi.org>
Sent: Wednesday, January 03, 2007 7:47 PM
Subject: [Diy_efi] Re: MoTeC for Mini Couper w/ siamese ports


> 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
>>
>>
>>
>>
>
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