75 pin firemwall bulkhead connector

[scotzilla]

Only thing i can find is a $375 mill spec set-up. Im trying to pass a 07 ford harness thru a firewall but not break the bank. Digikey.com doesnt have the cheaper plastic bulkheads with a pin count that high. Any one know where I can source one?

[TnBlkC230WZ]

It looks like Mouser carries the parts for the Delphi 78 pin connector. The Delphi site is down this evening so I can see the full configuration. All the part needed will be listed in the Delphi catalog or on the data sheet when the site is up.

http://www.mouser.com/Search/Product...yV%252bg%3d%3d

[scotzilla]

that would work perfect if they had both sides of the plug- i need to find another delphi dealer and i would be in biusness- thanks

[TnBlkC230WZ]

They have both sides. You'll need the part numbers to all the parts. You can down load the catalog from this link. You can also click on the data sheet from the Mouser site and view the drawings. You'll find part numbers for other components on the drawing as well.

http://connectors.delphi.com/DCSGDMC...adCatalog.aspx

[parsonsj]

I've used the 30(ish... can't remember the exact pin count) circuit version of that piece, and it's a nice setup. But it's big: larger than a deck of cards, and 2" thick (taking both sides into account). A 78 pin connector will be a monster... and you probably won't need near the current carrying ability of it. You might want to look for a 2 or 3 connector setup... something with small gauge wiring and high pin count for signal wires, and something with a larger current carrying ability and smaller pin count for higher amperage circuits.

[ehummelman]

I'm just curious why you would need that many wires going through? What do you have running up there? I'm guessing maybe EFI needs a bunch of stuff for the computer? Maybe use 2 separate bulkheads. Painless has a nice 29 wire bulkhead if you can whittle down your connection needs.

[parsonsj]

Another thing to consider is where all the wires are coming from. If you want the controller under the dash, then all your O2 sensors, VSS, neutral safety, pump control, HVAC inputs, etc. from come from places other then under the hood. I'll bet you can get under 50 wires, even taking into account separate gauge sensors and such.

[Gandalf]

I've used the 30(ish... can't remember the exact pin count) circuit version of that piece, and it's a nice setup. But it's big: larger than a deck of cards, and 2" thick (taking both sides into account). A 78 pin connector will be a monster... and you probably won't need near the current carrying ability of it. You might want to look for a 2 or 3 connector setup... something with small gauge wiring and high pin count for signal wires, and something with a larger current carrying ability and smaller pin count for higher amperage circuits.

I was about to reply with the same info. I purchased the 30(something) connector and did not check the physical dimensions first. It is HUGE so I can only imagine what this 70+ connector looks like! JP mentioned a deck of cards - I think he must have meant Tarot cards lol! It's big. I did not end up using it. I had Best of Show create a removeable housing with the SpearTech gromet that gave me serviceability and function. If it were visable on either side I would have made a point to hunt down a connector solution and was at the point JP is describing - going with a multi-connector solution. The idea was to break-out the coilpack wiring since it is known to spike to 13A and then carry all the other signal wiring in something smaller like a MilSpec. My body harness is already routed through another hidden area of the firewall so no other high-amp signals being passed, just engine harness/sensors.

All in all - "what he said" :-)
Gregg

[scotzilla]

thats for the leads guys- We i did find a catalog with update part numbers and mouser did have them. THey are already ordered so if its too large ill look for another option. Im passing a efi harness thru the firewall- Its a 07 4.6 motor. there were 70 20 gauge wires in it. The ford racing harness and relay and fuse box is designed to be inside the car. I found the right milspec connector but it was over $400 for the two halves not including the actual pins. THis option was under 100 for everything.

Im interested to what the best of show creation looks like. Ill try and search to find that speartech grommet.

[Dr G]

One thing to consider is that you could split your 70 wires over two or more connectors.

In the popular MIL-C-26482-II connectors, the largest size (contact arrangement) is a 24-61, which holds 61 20 gauge pins (or sockets).

If you go to this website:

http://www.connecticc.com/Default.as...nectors_MS3470

you will see they list for about $40 per side ($80 total) in Olive Drab or Black.

You would need the crimp tool for the pins and sockets though.

You could combine a 22-32 and a 22-55 to yeild 32+55 = 87 pins (20 gauge).

This would be a very reliable connection.

The data sheet for these connectors can be found here (among many other locations):

http://www.tntc.com/News/Amphenol%20MS3470.pdf

Gustave

[TnBlkC230WZ]

Can you post a pic of it in the car. Curious to see how it looks. I've never used anything this big. The Delphi connectors are very reliable, low price and reasonably easy to assemble; so I like to use them.

thats for the leads guys- We i did find a catalog with update part numbers and mouser did have them. THey are already ordered so if its too large ill look for another option. Im passing a efi harness thru the firewall- Its a 07 4.6 motor. there were 70 20 gauge wires in it. The ford racing harness and relay and fuse box is designed to be inside the car. I found the right milspec connector but it was over $400 for the two halves not including the actual pins. THis option was under 100 for everything.

Im interested to what the best of show creation looks like. Ill try and search to find that speartech grommet.

[Gandalf]

Im interested to what the best of show creation looks like. Ill try and search to find that speartech grommet.

I'll see if I have a pictur of Eric's (BOS) creation. He named it the "mouse-trap". When you see it you will know why. It basically gives me the ability to remove that housing from a larger opening on the trans tunnel so that I can pull the engine harness connectors through without them binding-up or getting caught on something. On the inner-side of that mouse-trap is the SpearTech supplied grommet. It's a large gromet made of quality, flexible rubber with a decent "sleeve". I purchased them direct from John at SpearTech. I ended up using one to pass my battery cables and ISIS runs through the rear side panel by the back seat, into the qtr to get back to the trunk. I trimmed out the middle to the size I wanted and it worked perfectly. Again, I'll try to find a picture or two. JP had info on some milspec-style connectors also (I forget the brand but they used them on their super-duper-pro-touring-can-do-everything car). They looked like a great alternative to the more expensive Milspec ones.

Gregg

[parsonsj]

JP had info on some milspec-style connectors also (I forget the brand but they used them on their super-duper-pro-touring-can-do-everything car). They looked like a great alternative to the more expensive Milspec ones.

LOL! They are Molex XRC, and I've got em in either 18 or 31 circuit connectors.

[vintageracer]

Cadillacs such as the full size Fleetwood Brougham's used a multi-pin firewall connection on the passenger side of the firewall. I used one on the build of my 66 Shelby race car. Great for many circuits but NOT high amperage circuits.

These connectors are easily obtainable at Pull A Part and use GM weather-pak connectors for wiring termination.

A now cheap option that is worth a look!

Here is what I used. Only 22 pins but it worked great for me. Here is one new. This will give you an idea of what to look for in the JY.

http://www.amazon.com/dp/B005O0V5JQ/...SIN=B005O0V5JQ

[TnBlkC230WZ]

There is a 36 pin version of that connector too. The Weatherpac connectors will handle 20 amps continously

Cadillacs such as the full size Fleetwood Brougham's used a multi-pin firewall connection on the passenger side of the firewall. I used one on the build of my 66 Shelby race car. Great for many circuits but NOT high amperage circuits.

These connectors are easily obtainable at Pull A Part and use GM weather-pak connectors for wiring termination.

A now cheap option that is worth a look!

Here is what I used. Only 22 pins but it worked great for me. Here is one new. This will give you an idea of what to look for in the JY.

http://www.amazon.com/dp/B005O0V5JQ/...SIN=B005O0V5JQ

[vintageracer]

The 36 pin connector is the one I used.

I thought that 24 looked a little small however it was 13 years ago that I wired the car!