upgraded coil pack

[LSiTo5Revo]

Trying to get the most horse out of what I have. I'm curious to know if an upgraded coil pack would make much of a difference.

Would it cause more problems than its worth?

would i need to upgrade more than just the pack if there is ANY benefit at all?

and really is there any AM packs for subies? "heard MSD sucks"

[httrdd]

Trying to get the most horse out of what I have. I'm curious to know if an upgraded coil pack would make much of a difference.

Would it cause more problems than its worth?

would i need to upgrade more than just the pack if there is ANY benefit at all?

and really is there any AM packs for subies? "heard MSD sucks"

You are freakin nuts. I hear MSD is the best one out there. I bought a coil for my 99 LGT, but had no time to install it before my swap. I will look for another MSD for my Eg33 swap.

[TGX4776]

We get the one for a 99 neon right?

[StatGSR]

You are freakin nuts. I hear MSD is the best one out there. I bought a coil for my 99 LGT, but had no time to install it before my swap. I will look for another MSD for my Eg33 swap.

um, we dont have a coil pack on our eg33s... (igniter + coil on plug).. :grin:

[httrdd]

Oh yea.............

[LSiTo5Revo]

http://legacygt.com/forums/showthread.p ... l?t=128027 (http://legacygt.com/forums/showthread.php/00-2-5l-msd-subaru-coil-pack-ignition-upgrade-128027.html?t=128027)


some say yes..some say no. would it be worth it to get a pack or no?

[httrdd]

Not sure 100 percent, but it will help when you put onother mods. I think you can buy the MSD for like 75 bucks so it is worth a try. Hell I had a huge difference when I put in NGK v power plugs with Magnacor racing wires. The MSD would of worked nicely with those.

[ouch1011]

Multi-spark ignition systems really lose a lot of their effectiveness on fuel injected cars compared to carbed cars, because carbureted cars never really have the correct air/fuel mixture and need all the help they can get to ignite and burn the air/fuel mix, especially at idle. A properly tuned fuel injected car doesn't really have that problem most of the time. Exceptions to that would be if you had a low-compression turbo engine, and engine with inherent combustion problems (like a Hemi or a Ford mod motor), if you are using a very slow-burning fuel (like very high octane or E85) or you engine is really tired and worn-out.

The stock ignition system is really pretty good. Considering that the only difference between an MSD coil and the stock would be the multispark discharge, and even then that is only up to about 2000rpm (voltage output is going to be nearly the same, possibly even lower with the MSD), I would say for most it wouldn't be worth it to replace a good stock coil with an MSD. If your stock coil has failed and you need to replace it anyway, it might not be a bad idea, but I doubt it would be worth it to replace a good stock coil.

[LSiTo5Revo]

Multi-spark ignition systems really lose a lot of their effectiveness on fuel injected cars compared to carbed cars, because carbureted cars never really have the correct air/fuel mixture and need all the help they can get to ignite and burn the air/fuel mix, especially at idle. A properly tuned fuel injected car doesn't really have that problem most of the time. Exceptions to that would be if you had a low-compression turbo engine, and engine with inherent combustion problems (like a Hemi or a Ford mod motor), if you are using a very slow-burning fuel (like very high octane or E85) or you engine is really tired and worn-out.

The stock ignition system is really pretty good. Considering that the only difference between an MSD coil and the stock would be the multispark discharge, and even then that is only up to about 2000rpm (voltage output is going to be nearly the same, possibly even lower with the MSD), I would say for most it wouldn't be worth it to replace a good stock coil with an MSD. If your stock coil has failed and you need to replace it anyway, it might not be a bad idea, but I doubt it would be worth it to replace a good stock coil.
nice explanation. greatly detailed. looks like im not going to bother with it.

[nomad666666]

The stock ignition system is really pretty good. Considering that the only difference between an MSD coil and the stock would be the multispark discharge, and even then that is only up to about 2000rpm (voltage output is going to be nearly the same, possibly even lower with the MSD), I would say for most it wouldn't be worth it to replace a good stock coil with an MSD. If your stock coil has failed and you need to replace it anyway, it might not be a bad idea, but I doubt it would be worth it to replace a good stock coil.



The MSD ignition box is what makes an MSD coil multiple spark the coil dosen't..

[Robbks]

upgraded coil pack for what engine? year? vehicle? etc?

[subie/legacy]

^^^ all ej22 n/a and ej25 n/a with three wires coming from the coil pack.

[Robbks]

^^^ all ej22 n/a and ej25 n/a with three wires coming from the coil pack.

ahh, right.

there was no mention of what year/ model/ N.A/ turbo, etc.

you could use the MY01+ NA impreza COP coilpacks with built in igniters.
all you need to do is remove all the existing coilpack and igniter wiring and run your signal/ power and earth directly to each coilpack.
this way you don;t have to worry about HT leads breaking down over time, etc

[mike-tracy]

^^ See, the only USDM N/A car we got with COP was the SVX.

[Robbks]

how sh!t is that!
(the USDM cars were worse than AUDM as far as good bits goes.
fancy giving an EJ22T, dodgy SOHC heads and no intercooler!..?
and not even getting the GC8 chassis!)

hit up the JDM vendors and get some good ones.

I'm unsure about the charge-time differences between the NA and Turbo models
but 01+ WRX COP's would probably be another good option

[goodnight1985]

The factory coil is around 30,000 volts while the MSD coil is around 37,000 volts. With correct wires and a slight increase in the gap of the plug (increase from the factory setting of 1.1 mm to 1.4-1.5 mm), you will have a more powerful spark. That is were you can make a little extra power on the engine.

[Quest]

I did that mod. Verdict: Do Not Waste Your $

[Drakien]

I did the stock neon coilpack and I noticed a difference mainly when running my A/C. I don't lose power when it kicks on, where before the upgrade I would bog down when the compressor kicked in. This is with a 95 EJ22. I say its a good bang for your buck. MSD might not be worth the extra $$$ over a junkyard neon pack though.

I am at 5-6k Elevation for a majority of my driving running 87 octane. If that makes any difference.

[J.McDonald Knives]

I did the MSD coil conversion on my 97 BG and I noticed a slight increase in power and about 0.5mpg more but thats also on OEM type wires with stock plug gap. The most noticeable thing was the smoother idle which I can barely hear or feel now and I dont even have a grounding kit on my car yet.

A correction to those quoting numbers on stock to MSD difference, the stock coil pack is 28kV and the MSD coil is 36kV and the stock neon is 34kV.

As far as plug gap goes, I've been told to go both ways on the gap, some said shorter gap for hotter spark, other said increase gap for hotter spark. The ones saying go shorter on gap were the techs at Engine Logics out of Houston, TX. So I'll have to test the theories out in stages. I'll do one spark plug change with shorter gap and monitor fuel mileage and SOP hp gains and then I'll either increase gap a few months later or wait til next spark plug change but when I do my next plug change I'm going with Magnacor wires for sure.