McCully Racing Motors

Welcome to McCully Racing Motors!

What about the Future?

We’d be fools to assume the world’s junk yards and eBay will always be littered with available 1988-1995 Mustang wire harnesses. In the last three years we’ve seen the average eBay donor harness jump from around $50-$80 to $75-$150. While we’re pretty sure the supply is not going to dry up any time too soon, we do realize that customers may want another ECU/Harness option while still staying with Ford power.

For use in our own 331 we’ve been looking at the newest MegaSquirt ECU, the MSIII. It looks as though this system may be the way to deliver modern-age power and fuel economy from Ford’s 20 year-old pushrod engine technology.

In the near future we’re planning to start converting the 331 to an MSIII system using a completely new McCully Racing Motors custom harness to connect it to the existing Ford sensors, relays, senders, coils, etc. If this works out, we would like to offer the harness for sale.

The harness would be designed to plug right into a MSIII on one end and have at the other end OEM Ford plugs for all the Ford equipment. Prices would be comparable to paying our “find-me-a-donor-harness” price of $150 + the cost of our full mods, about $250. Customers would have to order their MSIII ECU built or in kit form from any of the online venders that deal in it. We’re very optimistic about the potential of this ECU and harness to “modernize” the Ford V8 option for those looking to convert their Miata, while still keeping total build cost well below that of a LSx build.

-Stay Tuned!!!!

McCully Racing Motors

Allentown/Barto, PA

To Order email or call the following:

 

E-mail: mccullyracingmotors@gmail.com

or

Phone: 267.254.6687

 

 

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Under Development!

For a few years now we’ve been approached once every year or so about converting a 1994-95 “SN95” Mustang harness for use in a V8 Miata as opposed to the traditional “fox body” harness. As of late, the requests have gone from once a year to about once a month. So, as the requests increase, and 20+ year old Fox harnesses get more rare, we’ve decided that now is the time to develop a conversion service for these newer harnesses.

We’re currently cooperating with a customer who is helping us develop this harness for his car. Once that’s done, we’ll be offering the service for others. Pricing will be right around where our current harness conversion price sits, maybe a little more, maybe a little less.

 

Because two heads are ALWAYS better than one.

In the Works:

* ”SN95 Conversion Harness” Conversion harness made up using a SN95 Mustang (1994/95 5.0) harness and ECU as a donor.

* “MS3 Plug and Play Harness” A plug and play harness that can be used to add a MS3 with MS3X board to any 5.0, 331 or 347 Mustang or Miata

*”Tech Pages” here at MRM to guide you through some difficult areas of the conversion process

* “Customers’ Rides” section featuring some of the machines MRM parts have helped get on the road

* “Hardware Pack” for Monster Miata kits: All the bolts, nuts and washers you need in one rather heavy box (not everyone has an Ace hardware near by…)

TFI Kits Upgraded AGAIN!

We get quite a few emails from perspective TFI relocation kit customers asking why we do not RF shield our TFI extension harnesses. The truth is, we looked into Ford’s version of the harness that they used (which had no shielding) and simply emulated it. After all, what worked for the OEM’s should work for us, right? We went ahead and designed the system, installed it in our test car, ran it for a year or so under the most demanding conditions, and only then, when  we were sure it worked flawlessly, did we offer the kit for sale.

That said, we are always open to customer input. Customers wanted shielding, so we did it. As a result of prospective customer input, we’re now including full shielding on every TFI extension harness. The shielding is a layer of 3M copper foil RF shielding tape with conductive adhesive that is wrapped over our original design harness. A bare grounding wire is integrated in that allows the entire shield to be grounded to the body of the car. To protect the shielding, it is again wrapped in another layer of vinyl and the ends sealed with heat-shrink tubing. The whole process is described, with pictures on the TFI Relocation product page. You get all this RF blocking goodness for only $5.00 more per kit, which makes the kit now $54.99 or $65.00 shipped to your door (still a lot cheaper than “that eBay guy” we keep hearing about).

Just as we did last time we upgraded the TFI harness, we will be offering a discounted “Upgrade Offer” for customers who already have the TFI kit but would like to upgrade to the new shielded harness. What we’ll be doing this time is accepting your old harness as a core and then sending you out another returned core with the shielding layer added. If interested, contact us via email. The cost for this will be $15.00 shipped + your original harness.