Looks like you could make the wire holes and the PCV cutout much smaller. Nice looking bracket though.

The design of these brackets in post #18. 19, and 20 are definitely much different than the 3 coil variations that allow you to mount the coils with two pieces of all-thread/long bolts.

I've seen somewhere on MT where someone bolted the coils to each other and then directly to the valve cover I think without any bracket, forget where I saw that though.

Also, is every one running the 4.5ms dwell as suggested in the first post of this thread? I wired up my coils yesterday and I think I blew one, I'm wondering if it was a bad coil or dwell related. I haven't revved past ~3,000 and only in my garage so far, seems weird.

Also this:

Is wired like this:

A - existing ground wire on coil connector loom
B - lol wat? I'm just sitting here doing nothing...

Should I fix this asap?

One thing I want to add is that Magnacore will make you custom spark plug wires to the lengths you need for about $100, and they include a life time warranty.

This kit of ends to match the coils cost ~$15 and has the ability to work with your existing stock plug wires and has enough (8) to do two sets if you ever buy more wires later. Trim your existing wires to fit (or any others you may like).

https://www.miataturbo.net/attachmen...ine=1421869195

There's nothing keeping you from removing the LS2 coils from their metal cages and welding the things together.

https://www.miataturbo.net/attachmen...ine=1421875394

I bolted mine together with allthread, welded them all together, then cut off the ears with holes so I could fit them behind the head and firewall. Then welded a straight piece of 1" flat stock as a mounting point, pretty easy. The way it's set up I can tighten the coils up in the metal cage so they don't rattle, yet sill bend it back to easily remove them. I put them on an angle so there's slightly more room on the back of my head for reroute stuff. I can fit my hand back there if need be, under the coils.

https://www.miataturbo.net/attachmen...ine=1421875394

The coils are easy to reinstall, and can easily be switched out if any go bad. Putting them in the stock location meant I could reuse my stock plug wires without even cutting them or having them look unnecessarily long. The contact point of the LS2 coil is quite a bit smaller than the miata, probably half as large. If you are careful, you can separate the coil side of the plug boots from the wire, then you can rework the contact so it fits the LS2 tightly. The contact point needs to be more exposed from the boot than factory. To get it perfect, I just install the metal contact, then slip the boot down over the coil. Screw $100 plug wires :fawk:

https://www.miataturbo.net/attachmen...ine=1421875394

And that's how I did LS2 coils for ~$75 in coils and harness. I already had the coils from my LSx truck days, so free coils! :giggle:

Update on my dead coil:

Seems to be a wiring pigtail issue. If I pushed down on the pigtail, #3 cylinder would fire up. I dismantled the pigtail, and the clips used in these:

New GM Ignition Coil Connectors Wiring Pigtail LS2 LS7 D581 D585 Truck RX8 | eBay

do NOT fit snuggly on the pins of the coil, therefore you're relying on the tip of the pin to transfer the ground, power, and signal. I don't think my #3 coil was doing so, but by pushing down on the pigtail, the sides were finally touching and I had a 4 cylinder again.

Whether or not my cheap ebay coils or my cheap ebay pigtails are to blame is still up for debate. I'd love for one of you fellas to get a good, in-depth shot of the coil pins, so I can compare size.

In the mean time I'll be hunting for higher quality pigtails to see if there's a difference.

I currently run 4.2ms of dwell. I was running 3.5ms before but was having intermittent misfires at higher boost and rpm. I turned it up to 4.2ms just to try it and it got a little better. What fixed it was switching from stock miata plug wires to the Corvette wires. The miata wires I had to make the coil end connector much smaller and it still wasn't getting a very good connection so I guess at higher rpms it started arcing instead of going down the plug wire. These new wires fit nice and tight on the LS coils and click into place. The spark plug ends are very small but using a screwdriver to push down on them and they click into place on the spark plug and are nice and tight. Now I have no more high boost/rpm misfires.

A- grounds directly to the block.
B- is the signal ground which is suppose to go back to the signal ground on the Megasquirt. However myself and others run A and B together and ground directly to the block and it works just fine. I've been running them like this since last June and no problems. I am about to redo the wiring harness for the coils so I'm going to run B back to the sensor ground on the DIYPnP like your suppose to. Right now I have all 8 grounds from the coils soldered together and then soldered into a 2 gauge ring terminal that I have bolted to the back of the head.

This work? These should be OEM.

https://www.miataturbo.net/attachmen...ine=1421879690

Here's mine.

https://www.miataturbo.net/attachmen...ine=1408857850

Thank you. If anything, it appears as though the clips they used don't have a tongue inside that extends down to drag on the coil's pins. That last sentence was very sexual btw. Mine are very much a hot dog in a hallway.

Aren't they going to vibrate like mad?

If only one long edge of the bracket is mounted, the vibrations from the mounted edge get magnified through to the other long edge.

Here's my setup D514A with FM mount. Had to do a little massaging on the mount but it fits. No problems whatsoever.

https://www.miataturbo.net/attachmen...ine=1421882277

I picked up these pigtails :

New GM Ignition Coil Connectors Wiring Pigtail LS2 LS7 D581 D585 Truck RX8

https://dl.dropboxusercontent.com/u/...121_172902.jpg

Picture-ception :rofl:


They fit VERY snugly on the pins of my Junkyard LS2 Truck coils...

Now if only I would install these coils.... :loser:

The plugs themselves are SUPER tight on the coils.

It's the metal pins themselves, once removed from the plug, that I feel should be snug on the metal pin of the coil. That's my issue.

I pulled mine apart and checked. All seem pretty snug. No wiggle or theatrics involved. Maybe I got a decent set? :dunno:

No way of testing them to see if wiggling causes misfires though. These aren't installed.

I need to just sack up and buy an OEM harness off Ebay.

4X LS1 LS6 GM Ignition Coil Pack Connector Plug Set D580


Pigtails of above connector

These look to be the OEM-style pin connectors, as opposed to the white type we have. Couldn't find them in pig-tails though.

Edit : found pigtails.

Bought. If this doesn't test my crimping skills I don't know what will.

At the very least it'll be a quick test with the pins already out of the connector.

I assume you're using a nice racheting crimper? Otherwise go get one too :)

I'd trust these guys to crimp them properly, and this is $32 for the set:
Home » Shop » Connectors / Harnesses » Delphi / Packard » Pigtails » GM Delphi / Packard - 4 way GT 150 3.5mm Centerline male connector Pigtail for some GM truck ignition coils (index keyway)

You can custom order with longer wire on the pigtail if required.

I've bought stuff from them in the past (ironically for my Toyota COP conversion) and their work was top notch.

Cheers

I do have a nice crimper, I'll let you know how this goes. For the record, the old ones clipped onto the coil great, and the crimps inside the one I took apart were gorgeous. The metal pins themselves were just huge in comparison to the pin of the coil.