[Diy_efi] ECM for 1990 Nissan 240

[J]

>>Thanks for the info J, I am assuming that since it was
used on tpi cars it will be compatible with a mpi
setup then on my car ? I know all the 4 cyl
applications you listed are all TBI. And, I know that
a memcal can be fitted with a socket to facilitate
removal of the prom, but how hard is it ? I can
solder, but I wouldnt say that i am that great at it.
By the way, is this the same ecm used on the 2.0
sunbirds ? If it is then there wont be a prob with the
distributor since they all used one to my knowlege.
Thanks again,

Phil



The '7730 is capable of controlling a single peak-and-hold injector, or up 
to 8 saturated injectors, without torching the driver circuit.  They say you 
can upgrade the driver circuit parts to handle 8 peak-and-hold injectors, 
but I don't know the specifics on doing that.  It's a single driver, so you 
can do MPI but true SFI is out of the question.....it's strictly batch-fire.

The turbo Sunbird used a '7749, which is very similar to the '7730 but not 
identical.  The 3.1 Sunbird did use a '7730, but I think the regular 4-cyl 
cars had another ECM.  It may have been a '7727, which is just the 
"weatherpack" version of the '7730.

I don't know about putting a ZIF socket on the stock memcal as I've never 
done it.  Craig Moates (www.moates.net) makes an adapter that plugs into the 
stock memcal header, and has a header on the side for the factory memcal. 
Basically it just uses the stock knock filter and resistor network, but 
bypasses the stock PROM and instead has a place to plug in an EEPROM like a 
27SF512.  For $35 I think it's a decent deal.  The older HyperTech adapters 
are basically the same thing.