Grant M

Which should I go for? Does the use of the LS coils get rid of the igniter from the standard fd harness?

Does the LS set up provide a much more powerful spark than the twin power?

I am building an rx4 bridge port turbo (BW S366) and have just purchased a Haltech p1000 and I want to do things right first time and not have to change it out in the future because something isn't good enough.

Thanks for the advise.

fritts

iTrader: (5)

If your choice is only the LS2 coils or a twin power go twin power. Otherwise I would look into the ING1-A coils or the copy AEM smart inductive coils. I'm running 500 whp with them on E85 without a problem.

C. Ludwig

iTrader: (27)

AEM/Mercury IGN-1A. No questions.

rotorican85

iTrader: (9)

i did ls2 coils and got rid of the twin power. no issues whatsoever. actually runs better than with the fc coils and the twin power.
im also running a haltech PS1000

C. Ludwig

iTrader: (27)

There is a big thread on EFI101 with some pretty well known tuners saying they've been experiencing auto discharge with the LS truck coil. The "hot" one with the heat sink. I've heard similar things in the past but this is the first I've seen several people I respect all confirm it. I won't use them anymore.

The LS1 coils I have never been impressed with. Output is pretty poor.

The LS2 coil I have used in one car with good results. This is not the truck coil. It's smaller, no heat sink, square plastic body versus the round metal sleeve/mount of the truck coil. Haven't heard much else on these coils.

Lance Nist, guy that turned me on to the Mercury coils is working on a coil for GM. Says design parameter is to build a 500mJ!!! inductive coil for production use. I want!

Grant M

Thanks for the replies. Ludwig I am in the uk so I'm not sure where I would get those mercury coils? Would they be as easy to wire into the Haltech as the LS2 coils? As I have seen the installation diagram here in the Haltech sticky section and looks a piece of ****.

I currently have all the bits for an fd ignition system. Igniter, trailing and leading coils, twinpower and currently chopping and heat Shrinkin a harness., all of which I can now sell on.

I plan to run a WI system on my car at a future date so will the mercury coils cope with this well?

When do you think the 500mJ coil will be done? And will they be expensive?

C. Ludwig

iTrader: (27)

Anyone that can source AEM parts can now get you the Mercury coils. You need the "smart" coil. If you can't find anyone local, we can ship them over for you. They wire up the same way the LSx coils with the exception of having a 5 pin connector with 3 grounds instead of 2.

They will cope with pretty much anything. We have customers using them at well over 600 hp with AI. Haven't really found the limit with them yet. What engine management system are you running? With most systems that use a static dwell you are limited to around 4.5ms charge time with these coils. You can dwell them harder for short periods but you need mappable dwell. Guys that are running Motecs or the Haltech Pro ECUs, for example, can run dwell at 6.0ms only under high loads and extract even more from these coils. That said, all of the high power results I've seen have been with static dwell around 4.5ms.

No idea on the availability of the new coils. I wouldn't expect them any time soon. They're said to be for an GM OE application, so I wouldn't expect them to be outrageously expensive.

RENESISFD

iTrader: (13)

OP, here is a nice thread with some good info on these coils.

https://www.rx7club.com/3rd-generati...nstall-992444/

Grant M

I am actually getting a Haltech e11, not the ps1000, getting it from a mate who has never got around to using it as he has just sold his 20B to finish his rx3. From what I understand there isnt much difference between the e11 and the ps2000? Different formats and a couple of extra features with the 2000?

I should be able to wire everything up the same as I have had a quick scan through the installation manual. Does the e11 have 8 ignition outputs?

Grant M

Thanks. I have just found that from a google search of the coils

Grant M

Are these the same coils?

http://www.efi-parts.co.uk/index.php?productID=258

Have just found them on a uk website? I am going to see what the exchange rate is + import taxes etc as it will probably work out cheaper ordering from the US. I won't be getting them straight away, more like in a couple of weeks time as my girlfriend wants the kitchen tiling, and a stupidly expensive gold leaf mirror for our front room. Think I should get rid so I can get my rx4 finished with this ignition you guys are helping me with.

C. Ludwig

iTrader: (27)

Yes, that's the coil.

Grant M

How much would they be for you to ship them too me? I think I saw they're $77 each? Which works out cheaper than buying from the uk, by £60 GBP, so how much would delivery be from you?

Grant M

What leads would I need to use with these? Do the magnecor rx7 leads fit into them?

misterstyx69

iTrader: (142)

You can get a set of MSD custom wires and fabricate your own plug wires.
I personally got the V8 kit but you can get just the 4 cylinder kit and it will do you just fine.
It comes with everything you need and Fabrication is So,so easy.
Oh,the Magnacor Rx7 wires won't fit the coils,as the AEM's are High energy Ignition(HEI) top...like a spark plug top..(not like the old coil top).

Grant M

Aah ok that's not a problem. I will decide on where I'm mounting the coils and see what lengths I am going to need forthe leads, not afraid of making my own.

Grant M

Where can I get one of these kits from? Help is much appreciated. Thanks

C. Ludwig

iTrader: (27)

I can send one over with coils. They include the ends and a crimp tool that works with a bench vise. Cut the wire to length and crimp the end and you're ready to go.

Grant M

Sound but I have checked the customs charges and tax for getting coils from you and the robbing bastards will end up charging me enough to make them more expensive than buying the ones direct from the uk site I hate customs and imports. Thieving bastards.

I am interested in the kit though as I think they European distributor is based in Greece and their economy has gone to **** right now so would take a while to get the leads. If they have them stock, which they probably won't.

C. Ludwig

iTrader: (27)

My bad. We're building a harness for a Brit right now and was thinking it was you.

Grant M

No, but I have been passing the info about these coils onto a few others on the uk sites as there isn't much of a different option other than the twin power, which is almost double the price of those coils

VICEdOUT

iTrader: (1)

Aren't the MSD coil packs the same as the AEM ? They both say 40,000 v's.. Anyone know a specific spark plug wire set that comes pre crimped to fit the RX7 wit AEM style coil packs ? I want to get Magnecor wires but don't want to ditch them if I go AEM coil packs or MSD.. So in overall best spark output and the best upgrade possible, the pro's say just get 4 AEM coil packs over MSD, Twin Power or anything else out there period, be done with spark upgrades for good eh ?

C. Ludwig

iTrader: (27)

The MSD and AEM are not the same. The MSD is a GM based coil. The AEM is a relabeled Mercury Marine/IGN-1A.

Any HEI style spark plug wire will work with the AEM coils. We've been building custom wires using MSD 8.5mm wire and ends and selling u-build-it kits with this wire and ends, so that's one option for custom length. Magnecore is a great option as well and not a great deal more expensive.

IMO, go the AEM/IGN-1A route. Great spark output, easy installation, reliable service.

SakeBomb Garage

iTrader: (17)

We now offer a full plug-and-play coil package including mount, wiring harness, and plug leads for those interested

FD3S AEM Coil Upgrade - SakeBomb Garage

Grant M

Well I was going to be interested In the harness but damn that's expensive.