What computer to use with 1985 Merkur XR4Ti engine?
Well, my local u-pull-it just got in a 1985 Merkur XR4Ti... I plan on pulling the 2.3 turbo engine an all accessories to throw into my '74 Mustang II (yup, bye bye V8 swap... gonna have a heap big V8 swap parts sale soon!!!)
Only problem is, the Merkur has a C3 automatic, which I definitely don't want, especially when I've got a nice little 4spd already in the II that'll bolt right up.
Should I look for a manual tranny Merkur computer? or will the C3 computer work fine? Would an SVO or turbocoupe computer work better???
HELP! lol
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1976 Ford Mustang II Ghia: 302 with a 600cfm Edelbrock carb, Edelbrock Performer 289 intake, Dynomax Blackjack headers, 2.5" exhaust with Flowmaster Super 44s. RJS 11-gallon fuel cell, C4 tranny, chrome 16" pony wheels, fuzzy dice, brown vinyl half-top, and painted in the tackiest color ever (harvest gold, that's why I call it "The Goldenrod").
Also have a 2003 Dodge Ram (lightly modded daily driver/tow rig/office/dining room/home away from home/workshop... I call it "The Big Blue Dawg".)
If your Mustang Too. has a manual trans in it already, the ECU won't really give two flips about it. For all intents and purposes, the Merk ECU should work just fine unless the C3 had an electric lockup but I don't think it did.
I can't remember if the Merkurs were intercooled or not. The stock computer may be calibrated with that in mind, much like the LA boxes were for the intercooled T-birds.
Any thought as to what you're going to do for fuel delivery? They didn't make an EFI-fed II and I recall the tanks being closer to late Pinto than Fox so I doubt you can swap stock tanks. That leaves you with one of those 'spensive external pumps.
Have fun. If and when I ever get settled after this work transfer, I'm going to get back to dropping the TC motor I've got into the ol' '91 I've got.
Merkur isn't intercooled, fuel pump isn't a problem, I plan on using Master Fuel Pumps Part# E2000 for the swap (the high pressure externally mounted pump for several Ford vehicle in the 80s including trucks, certain Mustangs, and the Merkur) it's $83 at Advance Auto Parts (cheaper than a stock 5.0 pump).
May try it with the C3 computer, it's only $10 anyway, but I'm definitely keeping my RAD-4 transmission (manual 4-spd) in the II. C3 didn't have any lockup that I'm aware of, as they date back to the 70s and were even in carbureted 2.3 Pintos, Mustangs, etc.
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1976 Ford Mustang II Ghia: 302 with a 600cfm Edelbrock carb, Edelbrock Performer 289 intake, Dynomax Blackjack headers, 2.5" exhaust with Flowmaster Super 44s. RJS 11-gallon fuel cell, C4 tranny, chrome 16" pony wheels, fuzzy dice, brown vinyl half-top, and painted in the tackiest color ever (harvest gold, that's why I call it "The Goldenrod").
Also have a 2003 Dodge Ram (lightly modded daily driver/tow rig/office/dining room/home away from home/workshop... I call it "The Big Blue Dawg".)
The computer that was used in the SVO was a "PE". They are sometimes hard to come by. A turbo coupe EEc would also be good. Be sure to get one from a 5 speed as the auto was rated 50 HP less. I would think you would want the one from 87,88 model years.
PE's have been ridiculously priced for quite a few years. For what most people are asking for a PE you can purchase a Megasquirt setup and be done with EEC-IV. PE's were only used from 85.5 through the 86 model year so finding one is increasingly difficult. The LA box the TCs used is just fine for intercooled street applications on up. You can always modify the ECU later with a J3 or Tweecer if so desired.
Decided not to go with this engine, looked at it really closely while I was at the yard it's in today and it's a basketcase (had before just checked to make sure everything was there, just glancing it over). After finding the garden hose (I kid you not) hooked up to the heater core, the bailing wire holding the transmission dipstick up (tied to a heater hose!!!) the household extension cord wired to the electric fan (no joke!) and the general disrepair and lack of maintanence the engine compartment in general shows overall, I've decided to just go ahead and pull a running 289, 302, or 351 for my project and deal with the driveshaft issue rather than chase gremlins through a rigged up turbo 2.3... If anyone wants it, it's at Budget Pick N Pull on the eastbound side of US 190 between Belton and Killeen (G Wilson Rd Exit) in central Texas.
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1976 Ford Mustang II Ghia: 302 with a 600cfm Edelbrock carb, Edelbrock Performer 289 intake, Dynomax Blackjack headers, 2.5" exhaust with Flowmaster Super 44s. RJS 11-gallon fuel cell, C4 tranny, chrome 16" pony wheels, fuzzy dice, brown vinyl half-top, and painted in the tackiest color ever (harvest gold, that's why I call it "The Goldenrod").
Also have a 2003 Dodge Ram (lightly modded daily driver/tow rig/office/dining room/home away from home/workshop... I call it "The Big Blue Dawg".)
There are several very clean roller 5.0 Crown Vics and Lincolns that would be good engine donors (very clean except for being wrecked) they had one that was brought in under its own power the other day... waiting for it to hit the yard so I can pull it's long block...
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1976 Ford Mustang II Ghia: 302 with a 600cfm Edelbrock carb, Edelbrock Performer 289 intake, Dynomax Blackjack headers, 2.5" exhaust with Flowmaster Super 44s. RJS 11-gallon fuel cell, C4 tranny, chrome 16" pony wheels, fuzzy dice, brown vinyl half-top, and painted in the tackiest color ever (harvest gold, that's why I call it "The Goldenrod").
Also have a 2003 Dodge Ram (lightly modded daily driver/tow rig/office/dining room/home away from home/workshop... I call it "The Big Blue Dawg".)
What computer to use with 1985 Merkur XR4Ti engine? 
has a manual trans in it already, the ECU won't really give two flips about it. For all intents and purposes, the Merk ECU should work just fine unless the C3 had an electric lockup but I don't think it did. 
I ever get settled after this work transfer, I'm going to get back to dropping the TC motor I've got into the ol' '91 I've got.
