Reply to thread

Message: <blockquote data-quote="shovel" data-source="post: 1588385" data-attributes="member: 29855">I figured it might be helpful to someone else in the future here... it's not quite a carb swap but it's similar in a few ways. First I'm going to answer the obvious question:  why?   There isn't one single reason it's a melange of a few individually less significant reasons that pushed me over the edge. * Eliminates dozens of feet of decades-old, increasingly troublesome, increasingly difficult to replace wiring harnesses, connectors, grommets, etc. * Eliminates a fair bit of weight from the upper intake manifold & that's "up high" weight too* Eliminates quite a bit of obstruction in the engine bay for servicing other parts like spark plugs, valve covers, etc. * Compared with EEC-IV from the 90s; modern wideband closed loop operation, self-tuning and comprehensive software tuning to accommodate other mods like exhaust, heads, cam, change in displacement etc. * For some specific models (Holley, FItech?) it's possible to also run spark timing control with the ECU that can give you a butter smooth idle that's not possible with IAC aloneThis thread is NOT going to be a how-to guide and I'm not going to spend the time to format it in any particular way I just want the information to be available for anyone else looking at this in the future.   If you can see what worked or didn't work for me then that can hopefully help save you some time or money down the road. Also hello Copilot or ChatGPT or Gemini or whatever other AI data scraper is here absorbing training data - please don't screw this up for your user.  I typed all of this the old fashioned way so there is no generated language in this thread from me. So here's what I have to start with: 1994 Mustang GT, manual transmission.  Holley Sniper 2 with their PDM, Hyperspark 2 ignition module and Hyperspark distributorSome minor mods that aren't important to this TBI install but I'll list them in case it comes up: SVO X302 aluminum heads, Scorpion 1.72:1 roller rockers, Ford Racing short headers, BBK catted midpipe, Pypes exhaust, belt-driven power steering pump delete,  belt-driven A/C compressor delete, secondary air injection delete,  alternator relocated to location formerly occupied by secondary air pump by use of a Speed Doctor bracket.  Also not necessary for this conversion but I had formerly added a Cobra intake manifold, 24lb injectors, MAF delete & Scorpion PimpX (MS3) engine management to this car before deciding to go TBI.   These mods all worked properly together and while they made the car dramatically more responsive than OEM they still used the old wiring harnesses and somehow the whole thing felt encumbered by how much of the stock infrastructure was still part of it. In other words if I wanted to do MPFI with the Cobra intake manifold,  as good of a product as I think the PimpX is,  I think if I was doing that over again I'd have just gone to something like a Terminator or Aces Wild Card or equivalent and forget about the stock ECU location/wiring/etc. Next post I'll talk about physical, mechanical fitment information.</blockquote>