As long as the pins are the same, you can use whatever connectors you want

^Thats what I figured. That may be a simpler more elegant solution; rather than splicing wires.

I like the idea of using another amp / tyco connector ... someone test that out. :lol:

neit_jnf, The Twin Power harness connects after the Ignitor is in the circuit so one would still have to re-wire the stock Ignitor connector. If you're going to re-wire it, you might as well just attach to it when re-wiring it.

coils installed
 

Hi All,

So I finished fabricating a bracket from some spare aluminum stock, creating a harness and crimping some custom spark plug cables.

The car runs great. I usually have a miss here and there when it's cold ... up until about 160F. This is totally gone. The car seems to have a stronger pull under part throttle. I'm wondering if I had a partial failure of one of my trailing coils. Bottom line though, great upgrade.

Hey, what fuse is everyone running? After multiplying the duty cycle by current draw on each coil I came up with 53.2 amps at 8000RPM. I'm guessing that it's considerably more than is actually being used. I drove the car for about 20 minutes with a 50 amp fuse. Seems to be working fine.

James

P.S. Here's a few picks to add to the collection in this thread.

https://www.rx7club.com/attachment.p...1&d=1344822660https://www.rx7club.com/attachment.p...1&d=1344822660

I don't think I can resist anymore.

Do it!

I'm really glad that I took the time to do this.

My previous FD had all new coils, wires and plugs and still had an occasional idle misfire here and there. My current FD wasn't that much different. Everything that I've done has only improved the situation. That is, new plug wires = less misses; RC cleaned injectors = another improvement but still some misses; etc., etc., etc. Now ... the AEM coils ... I've been listening for a miss the last three days. I haven't heard a single one.

How often have you done a fix or upgrade to your FD and had your expectations 100% met? This is the first one that comes to mind for me. I really enjoy an engine that runs perfectly. This was the last piece in the puzzle for me.

James

Here's a quick breakdown of my time spend:

1) harness = 4 hours (Chris' is very worth the asking price)
2) mounting bracket = 3 hours
3) custom plug wires = 30 minutes

James, a 20 amp fuse will work for four coils on a stock electrical system. I use a 25 in the harnesses I build.

My set turned up today.

Has anyone installed these in the stock location yet? Pics? :). I cannot mount them like posted above as my car is RHD (ABS & Wiper motor in the way).

I'm not sure how you would fit four (stock are only three) coils in there. Might be possible though.

Check out how Dale mounted his H2O injection system here. If that area wasn't too prone to water and splashing it might work.

What about near the plugs themselves? Is there anywhere to attach a bracket to the engine?

That install looks great James.

I think they'd fit okay (Placed them in the location & placed the UIM on top...Seemed to clear it okay), I'm mainly concerned about the heat shortening their lifespan. It would be more complicated to make a bracket than other locations, though. I was interested to see if anyone else had tried it :).

I could possibly mount them like Gordon has for his 3 rotor...

RX7Club.com - gmonsen's Album: The Ancient One's Naturally Aspirated 3 Rotor

Not sure if the PS would get in the way.

Anyone tried any other locations?

On a right hand drive, without the steering shaft in the way, the frame rail should be a natural fit. I've put them there on LHD cars, which was a complete PITA because of the steering shaft.

Thanks, I'll have a proper look tonight. Last night it was literally tipping it down & my car is stuck outside in the weather, so I didn't hang about long enough for a proper look!

Thanks :)

Let me know how these fit, i have a LHD FD as well and faced with the same issue with the ABS, looking at this same option...

Thanks Flying_solo!

The second half of the MSD custom cut and crimp plug wires that I used for this install are for sale:

https://www.rx7club.com/3rd-generati...mount-1009688/

James

Just out of curiosity, why does the stock ignitor need to be bypassed? Couldn't you just run the "dumb" coils that don't have the ignitors built in?

I was debating just upgrading my leading coils with the "dumb" version of the coil. Is there any reason why this couldn't be done?

Also, is there a reason why I couldn't run a ignition amp with these? I currently run the twin power but it would be nice to run these instead of the stock leading coils.

These draw something to the effect of twice the current (on the 12v side) that the stock coils do. The stock ignitor (and Twin Power) would have trouble. Someone else with exact specs can chime in and confirm.

Hmm ... there's only one stock leading coil ... you'd be replacing it with two ... two coils X twice the current draw each = four times the current draw ... not good for the stock ignitor or wiring.

Just sell the Twin Power ... this will more than make up for what you're trying to save and let you stay on an already beaten path.

Ceylon have you installed these?
Thinking of buying a set myself and would be nice to hear of your results and ideas on where u fitted them.

Do you have a pfc or an other brand ecu?

I mounted them on the passenger side chassis leg. Ended up removing the engine to get it done :lol:. If you don't have AC its a strait forward install in this location. If you want to retain AC and the original line location its a bit of a PITA, but doable.

I'm using a PFC now, never tried them with the stock ECU.

Guys, we're working on mounting systems for these coils. Two different types. One would be very similar to what James Paventi did in the image below. The other would mount the four coils side by side so that they can be mounted to the frame rail or AC bracket (with AC and PS removed) as some have done. The first type is being designed as a bolt-in solution for the FD. The second as something that can be used for custom mounting solutions.

https://www.rx7club.com/attachments/...l-img_5887-jpg

right so which one would work on a rhd which still has ps and ac?

Keep us updated on that mounting system.

same, I'd be interested in that mounting system. 1 less thing I have to fab myself.

We've sold some coils to RHD guys and they have put them in the ABS area. Not sure how, haven't seen pics or cars in person. I've personally mounted the coils to the frame rail on LHD cars with AC and PS. It's TIGHT, but it can be done. On a RHD car it would seem, without the steering shaft, this would be a little eaiser.

In short, without a car here to physically touch, it's hard for me to say.

Fair enough I'll get in touch when i'm ready to order.
Thanks