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Using an EEC-IV Computer for only Timing
#1

Before I get my 2.3L turbo together and in the truck, I'd like to be able to drive it with the carbed 2.3L NA that's already in it.  (Don't worry, I still think this counts as a TurboFord question.)  The thing is, the previous owner who swapped it in didn't bring over the computer for the mustang that the engine came out of.  Therefore, while it has a TFI distributor it doesn't actually have any input from the computer, and is always running at initial timing, no advance at all (I think).  It runs pretty rough, and I'm guessing that's the main culprit.  I figure I have three options to deal with that. 

1.) Find a 74 Pinto distributor with points, 2.) add all the Duraspark stuff, or 3.) add a computer to run the TFI module.  I figure option 3 works best for me, so I can go ahead and mount the computer where I'm going to mount it for the turbo engine anyway.  And since I already have the computer, might as well put it to use.  It's a fairly temporary solution, and it'll help prepare for the 2.3T when I get it built. 

So my question is this:  Could I mount the computer (LA2 or ZAA) and wire up only the stuff related to the TFI module, or would the computer need the other sensors/EFI stuff to do engine timing?  I could get a different computer too, but I figure I'll just use what I have for now if I can. 

Thanks for the help,
-Ish
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#2

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It should work ~ BUT......it would probably be easier to install a Duraspark dist & ign module. OTOH, the LA2 would provide a timing curve intended for a turbocharged/intercooled motor (NOT good for N/A) and would need input from a TPS, VAM, ECT, ACT, etc. to run properly. 

I have no idea what a "ZAA" computer is designed to run. Is it for a N/A 2.3? It, too, would need some kinda ghetto-installed TPS and either a MAF or MAP sensor, along with all the other sensors to quantify the ideal spark advance (talkin' outta my ass here, b/c I have no personal experience with either strategy).  <shrug>

In the meantime.......try setting the base timing at 21° - 23° BTDC and see how you like it.
Placerville, California
(former)  '78 2.3T Courier w/blow-thru Autolite 2bbl carb ~ (current)  '87 2.3T Ranger w/PiMP’d EFI
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#3

ZAA is from a automatic turbo thunderbird I think... Yeah, I might just go the duraspark route if I would have to start adding sensors for the EEC to work right. Thanks
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#4

it used to be done with 5.0 carb conversions so i dont see why not!
Function before form. Going fast is looking good!
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#5

Without some additional sensors, it really will not be that much more of a curve than just setting the distributor to 25 degrees total and just driving it. You would need to install a VAM and coolant temp sensor at a minimum.
86 Mazda RX7, 2.3 swap, t5, MS3 sequential, BW EFR 6758
"If you can't dazzle them with knowledge, baffle them with bull sh*t"
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