Injectors and ECMs

[peter paul fenske]

Hi Ron

I am sure he can run the 749 in peak and hold mode
If not I think we can come up with a cheapo driver
for the low z injectors. Use Sandys board for instance.

I was sure both drivers were used in the 749.
Will check the schematic when I get home..

:peter

At 11:54 AM 10/19/98 -0500, you wrote:
>I have a buddy that has gone completely overboard with
>his Syclone.  We are now running out of injector.  He
>wants to go with huge injectors.  He also wants to go with
>the new Felpro SEFILO8 ECM, because the guy that sold
>him his camshaft said the stock ECM wouldn't work....
>I want to prove him wrong by using the stock ECM and
>maybe he'll give me some of the $2400 for helping....
>
>We are working on a GMC Syclone... using the
>Delco 1227749 ECM.  This is the same ECM that was
>used on the '87-90 turbo 2.0 'M' cars [Sunbird].  This
>ECM has two injector drivers, but from what I've 
>already learned, it only uses one injector driver.
>So, does that mean that all six injectors are fired at once,
>or does that one driver fire for each bank????
>
>Does anyone know if the turbo S-bird only used one driver, too?
>Or did it use both... and had different wiring... some pins the Sy
>doesn't use...
>
>My buddy just bought a set of six 55 lb/hr Seimans low-ohm
>fuel injectors [cheaper than a set of MSD high-ohm injectors]...
>yes... *before* I got all the answers... as usual...
>Someone [a turbo Regal expert] told him that all he had to
>do was swap-out the injector drivers.... maybe for a GN, but
>I doubt a Syclone... noone listens to me...
>
>Are low-ohm drivers intended to drive only one injector?
>Is it true that the low-ohm injectors are more stable... flow more
>predictably?
>Would it be worth the effort to build a small interface board to
>drive those low-ohm injectors via the current driver on the
>ECM?  What would that buy us?
>
>Would putting that 10-ohm resistor on each low-ohm injector 
>buy us anything other than the ability to use the injectors that
>he already bought... if that?
>
>I don't have [any of] the answers... please help...
>[pick all tha apply]
>
>*  get high-ohm injectors, 'cause they aren't bad
>*  go with Felpro ECM and low-ohm injectors
>*  build a board to drive low-ohm injectors with
>   GM ECM..
>*  check caller-ID box and don't answer the phone
>   any more when that clown calls back
>
>Thanks,
>~~~~~~
>Ron Gregory                 Syclone VIN #1452
>rgregory at iname.com          Garland, TX
>
>
>
>