[Diy_efi] Dual TBI ECM mods

[David Rowley]

That sounds pretty simple.  I take it that the transistors (Q9 and Q10) can handle the additional current they are being asked to supply (double), would that be true?  Or would I need a different transistor that can handle the additional current.  Thanks for the help.
 
Dave


jlg-sep at comcast.net wrote:
> I am new to this and I suspect this subject has already been discussed,
> so I hope no one will mind me possibly bringing it up again...
> 
> My question is this:  I want to use a 1227747 ECM with 2 TBI units.  In
> other words, I need the ECM to work with 4 injectors instead of the normal
> 2.  Does anyone know what changes need to be made to the ECM to drive
> the additional injectors?
 
Reference the following schematic from Ludis' site:
 
http://www.cruzers.com/~ludis/1228746sheet5.gif
 
At an absolute minimum, you need to remove R79 and R80 (Left and Right
injector current sense resistors) and replace them with .05ohm 1% units.
I've been using the Ohmite 3W version, available from Digikey under p/n
13FR050-ND.  You will then be able to run the second TBI injectors in
parallel with the first while still retaining proper peak and hold operation.
 
-Scott
 
_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://lists.diy-efi.org/mailman/listinfo/diy_efi

		
---------------------------------
 Yahoo! FareChase - Search multiple travel sites in one click.  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.diy-efi.org/pipermail/diy_efi/attachments/20051110/1410127e/attachment.html