# MoTec

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#### TXFlyGuy

##### Well-Known Member
I wouldn't get too caught up in the term "Mil-Spec".....

Clarification Note: Be aware that the term Mil-Spec can apply to the quality of something as simple as a common ring terminal on the end of a wire. While the ring terminal itself may be made to a Mil-Spec standard, that doesn't make it the proper connector for some terminals. Thats the point I was trying to make about generalizing the term Mil Spec.
The dealer made a big emphasis on the quality of their wiring, and wiring harnesses. Yes, he used the term Mil-Spec, as if it was a big deal. This is one big reason that I want to go with Fischer Motorsports.
And their experience in aviation is impressive.

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#### Winginit

##### Well-Known Member
When I worked in the Technical Materials Dept at a govt facility, we researched items to be purchased to make sure they met the needed requirements. Generally we (the public) never think about the many things that the govt must order, store and have immediately available for our troops. During our research we often stumbled upon Federal Stock Numbers for items that we never thought about. For some reason the fact that there were FSNs for beer stuck in my mind. Gotta have something for the troops NCO clubs. Another thing that I remember was that one of the guys found there was a Mil-Spec and stock numbers for womens hygene products. Guess the different numbers represented different sizes....:gig:

#### TXFlyGuy

##### Well-Known Member
I just learned that the MoTeC has multiple fuel ladders for programming. This is good, for burning 91/93 Octane and 100LL.

#### TXFlyGuy

##### Well-Known Member
Another thing that I remember was that one of the guys found there was a Mil-Spec and stock numbers for women's hygiene products. Guess the different numbers represented different sizes....:gig:
This is one time bigger is not better.

#### TXFlyGuy

##### Well-Known Member
After doing some additional reading online, one of the biggest factors supporting buying this ECU is the world class factory support. This appears to be a weak area with the Link.

MoTeC is a bit more complex, and requires an expert tuner. Note than any ECU is only as good as the person doing the tuning. Thankfully, we have an expert right here in the Dallas/Ft. Worth area.

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#### pictsidhe

##### Well-Known Member
You want an ECU that doesn't need support! Fit and forget is the order of the day here.
I'm not knocking MoTec as the do have a good reputation and have been in the game longer than most.

#### TXFlyGuy

##### Well-Known Member
You want an ECU that doesn't need support! Fit and forget is the order of the day here.
I'm not knocking MoTec as the do have a good reputation and have been in the game longer than most.
Everything that I own needs support! From my appliances, to my automobiles. That is why we have selected a dealer with much experience in aviation applications, including racing at Reno.

This is the one area where this company is head and shoulders above the rest of the ECU crowd. Based on ECU - Auto Forum feedback.

#### proppastie

##### Well-Known Member
Log Member
The Link is fine. Problems are with the wiring harness.
Confused, how do you have problems with a wiring harness? Is cross-talk a problem? A wire goes from here to there, whats to go wrong.

#### pictsidhe

##### Well-Known Member
Confused, how do you have problems with a wiring harness? Is cross-talk a problem? A wire goes from here to there, whats to go wrong.
When it doesn't go from here to there. Bad connections, or worse, a fatigued wire. If you discover a fatigued wire on a complex harness. Do yourself a favour. Remove the whole harness and insert it into the nearest trash receptacle. Other wires are usually not far behind.

#### proppastie

##### Well-Known Member
Log Member
a fatigued wire.
On an new harness? Yes I can see if the wires go to wrong place it is a problem, except he said the unit ran fine. Sure there could be a bad crimp, easy to see, easy to fix. I wounder if there is something else going on here. Perhaps this should have been in the
Supplier / Manufacturer Announcements category.

#### TXFlyGuy

##### Well-Known Member
It’s a connection, QC issue from what I’ve been told. May have a new harness built by a third party.

#### Winginit

##### Well-Known Member
What seems difficult about a harness to a first time buyer is deciding what wires you need to have.....what components need to be connected to what. Once that is determined, then making the crimped connections.....and doing it RIGHT is really pretty simple. It's pretty much repetitive crimping, but you have to use the right crimping tools for the kind of connectors being used. Have you thought about maybe having them get the wiring and letting you do the crimping? Who better to be sure the crimps are properly done than the person who will be relying on it. For the most part, the wiring should not give a problem, it's the terminations and connectors where the biggest chance of poor assembly will give a problem. If you insure the connections and terminations are properly performed then you don't have to wonder.

#### pictsidhe

##### Well-Known Member
Hell no, crimping is an art that few do well.

#### pictsidhe

##### Well-Known Member
To elaborate, people think they've done a good job, but actually, they haven't. Most people overestimate their wiring prowess. Is the malfunctioning harness a 'pro' job?
I've made two EFI harnesses. It is not something I'd ever recommend the average Joe attempt on an aircraft where one bad joint can really **** your life up. I've been playing with electronics for 40 years, I'm still learning.

#### Winginit

##### Well-Known Member
To elaborate, people think they've done a good job, but actually, they haven't. Most people overestimate their wiring prowess. Is the malfunctioning harness a 'pro' job?
I've made two EFI harnesses. It is not something I'd ever recommend the average Joe attempt on an aircraft where one bad joint can really **** your life up. I've been playing with electronics for 40 years, I'm still learning.
Exactly my point, one bad connection "can" ruin everthing, so who better to decide if all the crimps are satisfactory than the person who will be at risk. I realize it can be a daunting task to build a complete harness from scratch, but wires being routed to an incorrect connector will quickly reveal the mistake during pre flying testing. The hidden component is whether the "connections themselves" will be done properly....or improperly and loosen later.
That seems to be the point of contention to me, whether the connections themselves will be/are properly done. The process itself is pretty simple when using WeatherPack connectors which fit the sensors specific configuretions.I'm not sure why you would find this to be difficult. To me the difference is you have a Pro performing a simple task that he may have done a thousand times and does it with a second nature involvement, or you have a person performing a task for the first time and he has a serious interest in the outcome. The pro may skim over the process while the builder will concentrate and want it perfect. The Pro may be more capable overall, but the builder will watch every detail while seeking perfection. Crimping is a small but important step in building. We may disagree on the difficulty of the crimping process, but I do agree that trying to build a complete harness from scratch and get it right the first time can be very difficult. Here is a video of the crimping process for WeatherPack terminals.