LocostUSA.com

Learning how to build Lotus Seven replicas...together!
It is currently March 29, 2024, 8:57 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 48 posts ]  Go to page Previous  1, 2, 3, 4  Next
Author Message
 Post subject:
PostPosted: July 11, 2008, 3:39 pm 
Offline
User avatar

Joined: July 19, 2007, 4:09 pm
Posts: 550
Location: Austin, Tx
The 99 is electric. You'd just need wires, theres no "cable". You want a speedometer that understands electric pulses (like a tach). I havent looked for such a beast as I am using my miata's gauges. At least for speedo and tach. I dont even have a hole for the odometer


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: July 11, 2008, 4:45 pm 
Yes, the 99 sender plugs straight into the transmission. Most electronic speedos should be able to deal with it, although you'll have to find one that's programmable. I would expect the Autometer to do just fine.

Alternately, I have the rally computer on my race car hooked to an ABS sensor on the front wheel. The speedometer doesn't care, you just need to tell it X pulses equals Y distance.

There's no waiting list for salvage parts, your best bet is to ping salvage@flyinmiata.com in a couple of weeks. It's not a high-demand part.


Top
  
Reply with quote  
 Post subject:
PostPosted: October 10, 2008, 1:39 pm 
Anyone know a place I could get the metal pins that go in the ecu connectors? I wanted to lopp off 5 feet from my ECU harness and dont want to use butt connectors. I would rather just cut and crimp new ends on and reinstall it in the clip.


Top
  
Reply with quote  
 Post subject:
PostPosted: October 10, 2008, 2:12 pm 
Offline
Automotive Encyclopedia
User avatar

Joined: December 22, 2006, 2:05 pm
Posts: 8037
I would not use butt connectors either. Try the dealer for the pins, or cut, splice, and solder the other end.


Top
 Profile  
Reply with quote  
PostPosted: September 24, 2009, 1:37 am 
Offline
Man of Constant Hazard
User avatar

Joined: February 20, 2006, 11:18 am
Posts: 3186
Location: Lexington, KY
Out of the donor, my '93 Miata harness weighed 36 pounds.

As installed in the Locost, it is 10.5 pounds: viewtopic.php?f=35&t=2741&p=75472#p75472

FWIW,
-dave

_________________
...nowadays people are so intellectually lazy and lethargic that they can't build ANYTHING with their hands. They'll spend hours watching whiny people marooned on an island, but won't spend a second adding anything to the world. -weconway
Visit my [Locost 7 build log]


Top
 Profile  
Reply with quote  
PostPosted: November 25, 2009, 11:21 pm 
Offline
User avatar

Joined: July 17, 2008, 9:11 am
Posts: 6414
Location: West Chicago,IL
IF you can get OEM pins, the reliability of the joint is highly dependent on the use of a factory-style crimping tool. Tools are designed for the crimp connector. Sometimes the tool will be different dependant on the size of the wire. The use of common hardware store or radio shack crimpers are not reliable.

Common insulated butt joints are also not real reliable in an auto application, especially once you get outside the protected environment of the inside of a sedan.

I have just about finished the wiring mods on my RX-7 powered Locost and all the wires were shortened by cutting, barrel twisting, soldering and heatshrinking. Some of the heavier wires were overlapped and crimped using the crimo-end of a ring lug with out the ring. I removed the insulator, ran the wire ends parallel to each other, crimped then soldered and heatshrinked. Stagger any joints about 1" and the wire bundle won''t get too large.

_________________
Chuck.

“Any suspension will work if you don’t let it.” - Colin Chapman

Visit my ongoing MGB Rustoration log: over HERE

Or my Wankel powered Locost log : over HERE

And don't forget my Cushman Truckster resto Locostusa.com/forums/viewtopic.php?f=36&t=17766


Top
 Profile  
Reply with quote  
PostPosted: September 25, 2010, 1:28 am 
Offline
User avatar

Joined: November 7, 2008, 4:48 am
Posts: 1097
Location: snow city - it's wet!
Here's a link to motoiq.com's Miatabusa Project, part 4.2: link

I posted this because while we talk about the modifications needed, I haven't seen many different techniques demonstrated for harness design. The technique Dave Coleman uses to plan the modified wiring harness, lay it out and then route the wires is pretty slick. He creates a model of the desired harness using thin rope, and then anchors that to large section of pegboard. From there he cuts the relevant wire runs to size and adds connectors. It looks like a very slick way to reduce the pain of rebuilding a harness.

_________________
.. in the world


Top
 Profile  
Reply with quote  
PostPosted: September 25, 2010, 2:15 am 
Offline

Joined: April 16, 2010, 12:19 pm
Posts: 462
Location: Meridian, Idaho
erioshi wrote:
The technique Dave Coleman uses to plan the modified wiring harness, lay it out and then route the wires is pretty slick. He creates a model of the desired harness using thin rope, and then anchors that to large section of pegboard. From there he cuts the relevant wire runs to size and adds connectors. It looks like a very slick way to reduce the pain of rebuilding a harness.

So simple it's brilliant. I wish I had come across (or had) that idea a few months ago when I was rewiring my Mazda 3!

_________________
Steve


Top
 Profile  
Reply with quote  
PostPosted: August 13, 2011, 8:28 pm 
Offline

Joined: February 8, 2007, 4:35 pm
Posts: 60
Location: Atlanta Ga
Six Years after completion I am planning to tackle the wiring. Admitted that two of those years have been in storage, but the point is that if you don't want to mess with wiring you don't have to. The car runs fine with stock wiring too, and while not pretty, there is plenty of room to wrap the loom in front and under the dash.

Now with turbocharger heat, several leaks and racetrack abuse I am planning to remove the whole miata harness with stock ECU Emanage Ultimate.
I like to point out that the reason for this chance is frustration with brittle and confusing stock harness with all modifications happened twithin these years. Car is fine, but it has several shortcuts and replaced wires with external fuses as one can imagine. the wiring loom makes nice crakcling sound every time it is touched.

hrk

_________________
hrk


Top
 Profile  
Reply with quote  
PostPosted: September 25, 2011, 2:43 pm 
Offline
User avatar

Joined: November 13, 2009, 8:43 pm
Posts: 505
Location: Sunnyvale, CA
Matt: "Dear Mazda-Sensei, why do you have an in-line connector going another point on the same harness?"
Mazda: "Because it isn't the same harness, young wiring grasshopper. You must untangle more!"

Apparently there are three harnesses in a 1993 Miata: Main, Instrument Cluster and Rear. I had the Rear to tangled up that it looked like part of the Main. Then the wiring lengths didn't make sense!


You do not have the required permissions to view the files attached to this post.


Top
 Profile  
Reply with quote  
PostPosted: September 11, 2017, 1:34 pm 
Offline

Joined: August 27, 2017, 6:20 pm
Posts: 82
If you are looking to shorten your stock harness or build a new one with the stock harness or Megasquirt PNP, I found what I believe is the correct wire terminals. You can also get the female connector housings in case yours is broken. I haven't actually tried these, but you can compare your stuff to the drawings with calipers. It looks like you can get the terminals individually from Digikey without a minimum order.

.070" terminals https://www.digikey.com/product-detail/en/te-connectivity-amp-connectors/173631-1/A122177CT-ND/5418200?WT.srch=1&gclid=Cj0KCQjw6NjNBRDKARIsAFn3NMp4oJKO8A37-hYYbOGFaQiSpcpcyUEehrrQ-J8TgUMgrWizJe1fS-UaAst0EALw_wcB
Image

.040" terminals https://www.digikey.com/scripts/DkSearch/dksus.dll?Detail&itemSeq=238118864&uq=636407295633041788
Image

Now, I'm not at my shop right now (evacuated to Rome GA from Orlando because hurricane Irma) I would check the drawing against the stock one to make sure it would work, but I believe this is a good start.

You'll also need a crimper like this
https://www.3sx.com/store/comersus_viewItemBundle.asp?idProduct=34856
Image


Top
 Profile  
Reply with quote  
PostPosted: December 20, 2017, 5:17 pm 
Offline

Joined: April 17, 2009, 1:28 am
Posts: 212
Location: San Tan Valley, Arizona
I am in the process of editing the '95 Miata harness and have a couple questions:
1. Has any one experienced any problems shortening the O2 sensor wiring to the ECU (shielded Brown wire)?
2. ECU to main harness run is about 6' . Any problem with removing about 4 1/2' ?

Thanks,
Walt


Top
 Profile  
Reply with quote  
PostPosted: December 20, 2017, 7:51 pm 
Offline
User avatar

Joined: August 10, 2007, 12:05 am
Posts: 628
Location: Champion, Ohio
waltj wrote:
I am in the process of editing the '95 Miata harness and have a couple questions:
1. Has any one experienced any problems shortening the O2 sensor wiring to the ECU (shielded Brown wire)?
2. ECU to main harness run is about 6' . Any problem with removing about 4 1/2' ?

Thanks,
Walt



If you look, I shortened everything. I took out about 5' overall, if I recall. It included both of those.

_________________
"Most restaurants these days are as noisy as a drum-and-cymbal factory invaded by two hundred chimpanzees intent on committing percussion."

Dean Koontz


Top
 Profile  
Reply with quote  
PostPosted: December 20, 2017, 8:03 pm 
Offline

Joined: April 17, 2009, 1:28 am
Posts: 212
Location: San Tan Valley, Arizona
Thank you. I was a little worried about the O2 sensor input being shortened, but if it worked for you, then it should be good to go.


Top
 Profile  
Reply with quote  
PostPosted: December 21, 2017, 3:33 pm 
Offline
User avatar

Joined: August 10, 2007, 12:05 am
Posts: 628
Location: Champion, Ohio
waltj wrote:
Thank you. I was a little worried about the O2 sensor input being shortened, but if it worked for you, then it should be good to go.


Are you talking about the wiring that comes with the o2, or the wires that lead to the ecu? I'd have to look to verify, but if it's I the main harness, then it got chopped. If it's the fuel rail harness, them you're best of coiling it up.

_________________
"Most restaurants these days are as noisy as a drum-and-cymbal factory invaded by two hundred chimpanzees intent on committing percussion."

Dean Koontz


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 48 posts ]  Go to page Previous  1, 2, 3, 4  Next

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
POWERED_BY