The title is my question. I have heard good things about the Lx92 coils and the HI-6 setup (2 of each for leading).
Will the PFC be able to deal with this setup, will it even know it is there?

Thanks

 

The stock ecu or PFC send ignition pulses to the ignitor.

As long as you use these for stand alone ignition systems, or use the ignitor output pulses as is done with the Crane, it could care less.

Seems you need a little education in electronic basics. May I suggest something in the way of basic switching circuits.

 

Coop,

I've heard somewhere down the line of a HI-6 frying someones coils because the spark was so hot. Might wanna research this.

 

Never the HI-6 which I have the racing version with my original coils.

It is some Jacobs products that were burning stock coils. Our stock coils have a resistance of less than 1 ohm which is very low compared to regular ignition coils. This causes too high a current flow if the control unit was designed for the normal coils.

 

So are the Lx92 coils higher impedence or just able to handle higher current?
If the Crane HI-6 are stand alone then how are they triggered?
I don't understand what you mean by "or use the ignitor output pulses as is done with the Crane" are you saying using the Ignitor pulses from The PFC to trigger the HI-6?
Cewrx71: Are you using a PFC with the HI-6?
how do you trigger yours?
Thanks
-Dave

 

I would ask Boostn7 about this, he has a Crane in his car and runs a PFC.

 

Buy any ignition amp and read the manual. They instruct you on how to tie into the factory ignition signal, simple. There are two wires that go to each coil and you splice the box in, feed it 12V and ground, and mount it in a decent spot. Add some quality wires such as Taylor or Magnecore and give it a go.

I ran a Crane Hi-6 on my stock leading coil for a couple of years with 355 rwhp on stock motor/twins. It should suffice for most setups. If you want a better coil, try a T2 leading coil or one of the MSD motorcycle dual plug coils. If you don't fancy cutting into the ignition harness then buy an HKS and harness and its plug and play except for a single ground wire.

 

Thanks for the info...I was trying to avoid spending $600 to get the manual to find out my ECU won't work with the Crane setup.
I don't mind wiring it in, I am just trying to find out if the PFC will operate like normal, a black box setup: It sees the ignition and doesn't care what type. Or if switching to the CDI system will be incompatible with the PFC.

 

If you are thinking about spending $600, why would you not just go with the HKS Twinpower and address leading AND trailing for ~$400? No fuss.

 

I have heard better things about the Crane products... But I am still in the research phase.
I am considering the HKs unit...

 

The ecu(PFC) sends out ignition low voltage/low amperage switching pulses. Didital pulses!
All the ignitor does is uses these to turn them into high current pulses that are sent to the ignition primary coils.

Most aftermarket ignition ampifiers connect to the ignitor output in place of the coils. Then they send their own pulses to the coils. As in Crane HI-6 and MSD 6. The only thing that these really do is send a stronger pulse to the coil and thus produce a stronger spark for the plugs.

With an advanced ignition system, you could remove the stock coils and ign amp and replace it all with the new system thus only using the ecu/PFC singnal.
These is the BEST(also expensive) way to go, but is harder because there is so little room to mount all this in a stock street car.

 

I assume people remove the stock coils when doing this...? Is is safe to mount the new coils there...or do they even fit?
I have removed the AC so there is a little room there, and the battery is relocated so that provides some more room.

So, in your opinion, which system provides the largest gains...HKS TP, or the Crane Hi-6's and Lx92? I would assume the Crane setup would...I know it is a little more expensive, and only takes care of primary, but for power that is all that really matters, right?
If I am going for power, and plan on going single which setup would you recommend? I would rather spend a little more now, than to realize later I should have spent it.

Thanks for all your advice/knowledge

 

I think the Crane HI6/HI-6R are better than the MSD 6
and even the HKS TP. All three use the stock coils.

If you are going to run very high boost(18+), then you might need a better system with better different coils.

The leading coil is the problem as it fires twice as often as the trailing coils, and also has to spark across two gaps!

 

All you need is just one amp for the Leading coil. If you ever want to upgrade the leading coil just throw in a Turbo II leading coil. You can make over 600rwhp with no probs with a amp and Turbo II leading coil.

The leading combusts the large majority of the mixture and the stock trailing is enough for what ever remains, there really isnt a need to amp it. Well, if you were running 0 split you might want to amp them both but I assume your not doing that.

STEPHEN

 

i would use aftermarket coils with the crane hi-6, it fried my stock one. i am going to use 2 ps91 coils mounted on the firewall and make up some longer spark plug wires.

 

is anyone using something that would eliminate the stock ignitor? i am trying this with negative results

i am running haltech wires directly to the AEM and switched the AEM to falling instead of rising

so far the car runs like crap

 

The stock ECU and PFC send three low voltage/low current trigger pulses to the igniter which amplifies them and sends them to the three coils. To mimic this your AEM would need to produce either these three pulses or four pulses. A three pulse system like stock, would use only three coils. If you can produce 4 distinct trigger pulses, then you could run four coils (1 per plug) for a better ignition system.

As I never owned or seen the schematic for an AEM system, I do not know exactly how it picks up the firing pulses from the crank timing wheel or how many pickups it has. Theoretically with the proper software or hardware, only one TDC pickup is needed to produce all pulses. Either way, it would need 4 or 5 wires to trigger
either 3 or 4 IGN AMPS to drive 3 or 4 coils.

 

My Jacobs failed yesterday; it was setup to drive two single output XL91 coils as the Jacobs had destroyed two stock lead coils during WOT. I wonder if driving two coils simultaneously caused the Jacobs to fail (running on the trailings only ain't fun).

My question is: Can one amp drive two single output coils, or, do I need to run two HI-6's to drive two LX91's?