Better Ignition Coils

[LordWorm]

what would be the effect of a larger gap? I'm NA, with stupidty coils, so i could get a nice stable spark across a larger plug gap...would a bigger (as in, physically longer) spark be of any real world benifit?

 

[16902]

Where does one find this?

 

[LinuxRacr]

I got it at one of the main auto parts stores...I don't remember which one.

 

[Crazee D]

I thought there was another external coil NOT on the plugs

 

[Kansei]

nope that's it. it's a mega simple ignition system

 

[LordWorm]

Yeah battery delivers power to the coils, ecu fires the spark. I didn't have to remove anything but the coils and associated electrics when upgrading to my bosch coils.

bosch coils are much the same, only the coil driver is a seperate unit (X4).. i believe it provides some spark boost or something.....and i've read that the spark potential in the coils is something like 40 000volts...

 

[Kooldino]

Here is the set up Nick From MPI used on my car Accel coil pack and AEM Ignition amplifier.

How was it all wired up?

 

[Kooldino]

I tuned a car recently that seems to have come up with spark issues at higher RPMs. Was wondering what the stock coil output was:

http://www.mazdas247.com/forum/showthread.php?t=123662996&highlight=coil

He's gapped at .030" right now and still has the spark cut past 6K rpm. Maybe I'll tell him to go to .022"

 

[LinuxRacr]

I still have some slight spark cut-out.

 

[Kooldino]

I still have some slight spark cut-out.

How bad was it before? Would it ever cause a CEL? How bad is it now comparitively?

 

[LinuxRacr]

Never caused a CEL for misfire.

 

[Kooldino]

Did it cause a noticable stumble?

 

[LinuxRacr]

The funny thing is you only notice the break-up if you are the person driving. JDM Sam didn't feel what I was talking about until he drove my car.

 

[Kooldino]

I know what you mean. Feedback on the pedal.

 

[blthlt]

I'm having issues at 13 psi. I'm golden up until I try to go much above that. I've pretty much elimintated everything else as being the cause. I will try to take my gap to .020-.022 and see if that helps. Right now I'm at .025. Any updates from you guys?

 

[LinuxRacr]

I may have just figured out my ignition issues: Click Here

 

[Maxx Mazda]

I'm thinking of bumping up the dwell time on my coils if the spark blows out on me. Can you comment Juan? I wouldn't wanna go above 7-9ms instead of 5, but my buddy ran 12ms on his Cobalt SS-SC before he fried the coils...

 

[Kooldino]

Interesting.

 

[Maxx Mazda]

Fried my coils on Saturday night, but I didn't mess with dwell time yet. It was an incorrect setting in my Haltech ignition setup page. New coils in, all is well now.

 

[TurfBurn]

Dwell above 3 ms will typically fry our coils... dwell around 2.6 ms is enough to go over 18 psi. (based off the Microtech doing it that is at least....)

The MPI cuts dwell down to mess with spark timing and hence the ignition cutout issues that were made famous by it basically... our coils are fine as Juan can attest. Plug gaps around 30-35 thousandths and NOT using fine tipped plugs will go a long way to keeping things happy.