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  #1  
Old 03-29-2012, 11:09 PM
smc smc is offline
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$36 Replacement ignition coils?

Say it aint so! Well it is indeed so. In fact, these coils pump more volts with a longer spark duration than our stock ignition coils to boot!
One catch.. A little bit of fabrication work will be needed. But its nothing the average wrench cant do!

My SVX had the much hated, and apparently never truly solved in the forums, hiccup in the ignition.
Parts upon parts later. I was testing one of the coilpacks for spark by plugging in a spark plug and grounding the plug while running the engine to check for spark. While holding the coil, it shocked the bageezus out of me. Cripes! A bad coil!
Seeing how expensive they were, i began to track down an alternative.
And here it is!
http://www.summitracing.com/parts/SUM-850500/


The summit racing street and strip coil.

These can be remote mounted away from engine heat and vibration. More voltage, longer spark and 8k max rpm.

For spark plug wires, just a simple universal ACCEL kit. # 5040B
Perfect fit.





And with a little luck and relocation / removal of non-vital components, it will look a little something like this




Install is simple. Cut the two leads to the existing coilpacks, and use the supplied fittings to bolt them to the new coil. You just need to know which wire is + and -.

The spark energy by these coils is astounding! During tests,The spark jumped from the plug 9" to ground. o.O

Last edited by smc; 03-29-2012 at 11:12 PM.
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  #2  
Old 03-30-2012, 07:25 AM
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Re: $36 Replacement ignition coils?

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  #3  
Old 03-30-2012, 08:04 AM
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Sean486 Sean486 is offline
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Re: $36 Replacement ignition coils?

Wow that's awesome. I like the look when mounted too.
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  #4  
Old 04-02-2012, 01:01 AM
smc smc is offline
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Re: $36 Replacement ignition coils?

Allrighty. Update. Well, seeing that the weather cleared up for a bit. Eg it stopped snowing.. *grumble grumble* I took today and got things wired up. The battery is now located in the trunk with 4 ga. wire run through the cab, out an existing grommet in the drivers wheel well and into the engine bay. Ive removed the radiator overflow tank and it will be replaced with a smaller tank put in the old location of the battery, thus freeing up space on the drivers side wheel well arch.. Ive also removed the windshield wiper fluid tank and plumbed the line from the rear wiper tank, forward to the front windshield wiper squirters. Thus freeing up the passenger side wheel well arch.

Also, i removed the factory fuel filter canister and replaced it with a more compact inline fuel filter.

I have installed 1 new coil just as a tester and an immediate replacement for the burned out factory coil.

For what its worth, my low rpm ignition hiccup is completely gone now!
Its great to have the car back to full power again.

Im looking forward to getting the other 5 coils installed next week.

Pictures to follow tomorrow after work
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  #5  
Old 04-02-2012, 02:17 AM
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Re: $36 Replacement ignition coils?

Awesome! Looking forward to the pictures
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  #6  
Old 04-02-2012, 09:36 AM
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Re: $36 Replacement ignition coils?

Quote:
Originally Posted by smc View Post
Allrighty. Update. Well, seeing that the weather cleared up for a bit. Eg it stopped snowing.. *grumble grumble* I took today and got things wired up. The battery is now located in the trunk with 4 ga. wire run through the cab, out an existing grommet in the drivers wheel well and into the engine bay. Ive removed the radiator overflow tank and it will be replaced with a smaller tank put in the old location of the battery, thus freeing up space on the drivers side wheel well arch.. Ive also removed the windshield wiper fluid tank and plumbed the line from the rear wiper tank, forward to the front windshield wiper squirters. Thus freeing up the passenger side wheel well arch.

Also, i removed the factory fuel filter canister and replaced it with a more compact inline fuel filter.

I have installed 1 new coil just as a tester and an immediate replacement for the burned out factory coil.

For what its worth, my low rpm ignition hiccup is completely gone now!
Its great to have the car back to full power again.

Im looking forward to getting the other 5 coils installed next week.

Pictures to follow tomorrow after work
You and I are gonna get along just fine.

Click the battery relocation link in my sig for pics of how I did it.

All the things I bolded are things that I either have been planning to do or have already done. Post some pics!
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  #7  
Old 04-03-2012, 09:57 PM
smc smc is offline
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Re: $36 Replacement ignition coils?

Pictures of the ignition coil install. Just the one for now. Paycheck on friday will allow for 5 additional more. Also a few quick pictures of the battery relocation, and my hood louvers to reduce the under hood temps.

Here you can see the space that was freed up by the removal of the overflow tank and canister style fuel filter. Oddly enough, the new inline filter flows better than the old style. http://www.summitracing.com/parts/HLY-562-1/
Just that swap alone gives the car a bit more get up and go. And the old filter that I removed only had 2k miles on it. I was surprised.




Originally I had fabricated up aluminum mounting brackets that would act as a flat platform to mount the coils to. However it seems that they will be more compact and in all honesty look better, simply mounted using the supplied mounting hardware directly to the well.
Three coils will fit perfectly in the orientation.



The engine bay



The battery relocation. Fyi.. do NOT get this relocation kit from summit.
http://www.summitracing.com/parts/MRG-6279/



I dont know WTF Mr. Gasket was thinking when designing this kit, but there is no way in hell it will work. The battery clamp bracket is too wide for the battery box to secure the battery. It mounts to the box itself to hold it down. But the box is so flimsy that it bows out with even the slightest amount of tension. So i dont know what the heck they expect you to secure your battery with. I guess just let it flop around in there. The mounting bolts have thread on them for miles... below where you would normally bolt something. If your mounting surface is directly below the box (duh..) then you will need to create a 2" spacer in order to not run out of thread on the bolt while tightening it down.
Lastly, the top strap is directly in the center of the box. How the hell am i supposed to bolt this thing down? Drill holes in the strap to mount into the floor?

Again.. What the hell?


Any way. A few pictures of the louvers. A DRASTIC drop in under hood temps. To the point that after 10 minutes of 120 mph driving, the intake was still cool to the touch.
This was more or less a proof of concept install. There is a area of low pressure on the hood where i mounted the louvers. I noticed this after rain on the hood remained static there while at speed on the highway.
This was also proven after the install when on a cold night i hosed down the engine while hot thus creating copious amounts of steam. I shut the hood. A fair amount of steam escaped. Once I started driving, steam was sucked out of the bay Far more rapidly than at a stop.
This will be refined a bit more with a fiberglass hood in the future.






Last edited by smc; 04-03-2012 at 09:59 PM.
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  #8  
Old 04-04-2012, 09:27 PM
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ShiuludeSVX ShiuludeSVX is offline
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Re: $36 Replacement ignition coils?

That coil config is just nuts. I gotta do that while I'm contemplating the tranny fix.

Thanks for the big idea.
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Motorsport Floor Mats. Perma-Cool External T. Filter, New Front Axels {1/2008}. "Classic Radiators" unit "$36 coil alternative" and Tranny rebuild at 287k 8/2012


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  #9  
Old 12-07-2012, 05:51 PM
shark_22 shark_22 is offline
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Re: $36 Replacement ignition coils?

For the next summer, I want to change all my ignition coil.
I have read this thread and Im not sure which coil is the best(using the car on the track)

who have tried the msd coil?
http://www.summitracing.com/parts/MSD-8226/

that one
http://www.summitracing.com/parts/SUM-850500/

the gm one
http://www.carpartswarehouse.com/add...32-70055.html#

or finally using sti coil and remove my ignitor
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  #10  
Old 12-07-2012, 06:49 PM
smc smc is offline
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Re: $36 Replacement ignition coils?

If I did it again, I would go with the MSD 8226 coil as it has a ohm rating closer to the stock coil. As was mentioned a bit earlier in the thread, it would be less of a risk to the stock ignitor unit than using a coil of lower ohm rating.
that being said, Im not a huge fan of a multiple spark discharge (msd) coil. Id rather have a single powerful spark than two or three weaker sparks for my ignition source.
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  #11  
Old 12-08-2012, 10:28 AM
shark_22 shark_22 is offline
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Re: $36 Replacement ignition coils?

ok, so you don't have any problem(burn ignitor,...) with you 36$ coil pack?


the thing with the msd 8226 I have to buy the harness for each coil

probably have other model with the same ohm rating than the oem svx one but have to find it

Im gonna check the price of the sti coil at my subaru dealer but it probably gonna be the same price than the svx!
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  #12  
Old 12-08-2012, 10:58 AM
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Re: $36 Replacement ignition coils?

I have this and I can feel a difference in the 3,000 Rpm
http://www.rpmoutlet.com/musv6msdstkr.htm
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  #13  
Old 12-08-2012, 10:58 AM
smc smc is offline
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Re: $36 Replacement ignition coils?

Ive had no issue with them what so ever. However as oab_au pointed out: "The standard coils have a primary resistance of 0.7 ohms. This means that when the ECU turns the coil on for the dwell period, a primary current of 30 amps will flow, instead of 17 amps. This current is flowed by the Ignitor till the amperage reaches about 4 amps, when the Ignitor holds it at this level till the ECU turns it off to fire the coil, due to the lower primary resistance, it will rise to this level faster, and is held at this amperage for a longer time.

This presents two problems; First the coil or the Ignitor will finally burn out from the extra current. Second, because the coil has on lower primary resistance, the rise time, to build the magnetic field will be faster, and as they don’t have a diode in the secondary to prevent the coil from firing, on the field rising, the plug will fire at the start of the dwell period and again at the end, advancing the spark.

If you and going to use different coils, the dwell period of the ECU will have to be reduced to suit the coils primary resistance, and use the diode to protect against firing on the start of the rise time. If they are used with Capacitive Discharge ignition, they can be used without the dwell change and the diode, but the wires will still be trouble."

In other words, try to find a coil that has a primary resistance as close to 0.7 ohms that you can. Otherwise you may run the risk of burning out your ignitor block. My 0.4 ohm coils have not given me any trouble as of yet. But, then again, I dont have a ton of miles on this conversion. Only about 8,000.
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