Injectors and resistors

[Sandy]

The boards have 4 drivers on them, so you could use it to drive 4 peak and
hold injectors. It will also do saturated 1 amp style.  If you fire the
injectors in parallel and you are using peak and hold injectors you would
need to use all 4 drivers, and you should do the same for any drivers,
paralleling them is not a great idea. The board is 3.5x1.8" in size. The
price for the bare PCB's are $15 for 1, or $25 for 2 shipping included. You
can check out the basic circuit that is on the EFI332 web site or the
National Semiconductor Web site by looking up the LM1949 driver which the
board uses.

Sandy

At 09:39 AM 11/24/98 -0500, you wrote:
>Sandy,
>
>I might be interested in 1 or more of those boards.  What kinda money we
>talkin' and how many do I need.  I'm trying to efi a 4 cyl inline motorcycle
>(4 stroke) with 180 degree crank.  I intend to fire the injectors in
>parallel (2 at a time).  
>
>thanks
>
>Rick
>
>> -----Original Message-----
>> From:	Sandy [SMTP:sganz at wgn.net]
>> Sent:	Tuesday, November 24, 1998 12:12 AM
>> To:	diy_efi at efi332.eng.ohio-state.edu
>> Subject:	Re: Injectors and resistors
>> 
>> If you want to drive Peak and hold check out the EFI332 web site for
>> SUBDRV.EPS for the schematic. I have a few board I might part with.
>> 
>> Sandy
>> 
>> At 11:34 PM 11/23/98 -0500, you wrote:
>> >
>> >-----Original Message-----
>> >From: Richard Wakeling <kojab at ar.com.au>
>> >To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
>> >Date: Monday, November 23, 1998 11:25 PM
>> >Subject: Re: Injectors and resistors
>> >
>> >How many injectors are you driving this way, with the 10 ohms?
>> >Bruce
>> >
>> >
>> >>Hi Steve,
>> >> Use 10 ohm 10 watt with each 2.5 ohm injector. It will work but wont be
>> >>as good peek n hold. The other possiblity is to fit an extra driver to
>> >>the 808 and and get them to drive three injectors each peek n hold.
>> >>Cheers Richard.
>> >>
>> >>PS My Toyota has been running 2.2 ohm 750cc/min with 10 ohms for over
>> >>three years with delco 808. Idle was a bit tricky to tune.
>> >>
>> >>Steve Lamb wrote:
>> >>>
>> >>> I need the assistance of and EE......
>> >>>
>> >>> My next major project is to get an 808 ecm to drive a Nissan VG30DET
>> >>> engine.  This a 3L Quad Cam 24V single turbo engine.  We believe we
>> can
>> >>> solve the main hardware issues to overcome (TB's and ignition system),
>> >but
>> >>> one issue remains a thorny one...low impedance injectors (6, to be
>> >exact).
>> >>>
>> >>> I'm reliably informed that the 808 will not drive 6 low impedance
>> >>> injectors.  One alternative would be to change the injectors, but this
>> >>> would add quite a bit to the cost.  Another possible alternative is to
>> >try
>> >>> what Nissan did with its early L-Jet based systems......use a resistor
>> in
>> >>> series with each injector and thereby increase the total load (?) seen
>> by
>> >>> the injector driver.
>> >>>
>> >>> Can anyone see why an 808 ecm would or wouldn't work when used in this
>> >way
>> >>> ??   I was thinking of using 6 Ohm resistors, which is what Nissan use
>> in
>> >>> conjunction with their 2.5 Ohm injectors.
>> >>>
>> >>> Thanks
>> >>>
>> >>> Steve Lamb
>> >>> Department of Defence, DSTO
>> >>> Aeronautical and Maritime Research Laboratory
>> >>> 506 Lorimer Street
>> >>> Fishermans Bend  VIC 3207 Australia
>> >>>
>> >>> Tel: +61 3 9626 7525
>> >>> Fax: +61 3 9626 7089
>> >>>
>> >>> IZCC #180
>> >>
>> > 
>