[Stang281GT]

Has anyone every tried these before. They claim 15hp. Just wanted to get everyone input. Thanks

GMS Ford 2V Coil Pack Kit (99-04)

[99mustanggtman]

id stay away from gms products, try MSDs

[SWEET2KSTANG]

nothing wrong with GMS products. GMS makes a lot of products for other companies, a lot of guys are running their stuff and not even know it. the ignition holds up fine to a bolt on car and dont really show too much there. when running higher rpm's and power adders, ignition upgrades are always a good investment. i am running the GMS hot street coils on my car. i like them, i can tell a small difference on the top end. if you dont need coils, dont worry about sinking money into a set.

my topic:
few things i have gotten lately

[quiksilver225]

unless you need coil packs dont waste the cash.

[MATT02GT]

Originally Posted by 99mustanggtman id stay away from gms products, try MSDs

+1 Never heard any horror stories about their electrical stuff, but Ive heard enough about their other products to stay away

[Trick Tuners]

all aftermarket coils suck. None have been proven to add any benefit, and lots have been known to fail with low miles.

[quiksilver225]

Originally Posted by Trick Tuners all aftermarket coils suck. None have been proven to add any benefit, and lots have been known to fail with low miles.

i dunno about all that... You must be buying that crap they sell at advance auto or auto zone. Ignition uprgrade r definatley benificial on built motors.

[sgrcltpunk]

what about accel super coils i suspect one of my oem going bad so are they any good

[Trick Tuners]

Originally Posted by quiksilver225 Ignition uprgrade r definatley benificial on built motors.

Oh yeah? Got proof? I have seen a bunch of tuners test the aftermarket coils and none preformed statistically better than stock. For example is there proof that swapping to aftermarket coils has eliminated a spark blow out? If the coil fires the spark, no extra energy is needed. Is there any proof that you can increase the gap with the aftermarket coils? I have not seen any and i am on some tuner forums for dealers with the smartest guys in the nation.

[quiksilver225]

Originally Posted by Trick Tuners Oh yeah? Got proof? I have seen a bunch of tuners test the aftermarket coils and none preformed statistically better than stock. For example is there proof that swapping to aftermarket coils has eliminated a spark blow out? If the coil fires the spark, no extra energy is needed. Is there any proof that you can increase the gap with the aftermarket coils? I have not seen any and i am on some tuner forums for dealers with the smartest guys in the nation.

Lots of proof my man, LOTS. I dont think you fully appreciate how much performance and power can be lost due to a weak ignition system. Why dont you got out there and spray without upgrading your plugs to a colder heat stage? Why with that same spray do you need a upgraded ignition box? If your change your coil and wire to MSD you WILL get a hotter, better, spark! <FACT. Without that better spark you are liable to destroy shit! Especially with things like nitrous, or maybe an avid ricer such as yourself who is such a devoted member to tuner sites might know it better as "NOS." Anyone will agree that MSD make some of the best ignition parts out there and they are what??? What kind of parts??? AFTERMARKET!!! But keep up the unburned fuel and backfires, it seems to be working out well for you and your shitty ignition.

[99mustanggtman]

i run accels in my car, only because it was $200 for a set, I needed one COP but its like $80 from the dealer. So i just spent the extra on accels. I've run them the last 10k miles no problems at all

[Trick Tuners]

Originally Posted by quiksilver225 Lots of proof my man, LOTS.

I must have missed it. I'm talking about real data, not some guy on the net that says there are LOTS of proof. Post up dyno sheets or track times please.

Originally Posted by quiksilver225 I dont think you fully appreciate how much performance and power can be lost due to a weak ignition system. Why dont you got out there and spray without upgrading your plugs to a colder heat stage? Why with that same spray do you need a upgraded ignition box? If your change your coil and wire to MSD you WILL get a hotter, better, spark! <FACT. Without that better spark you are liable to destroy shit! Especially with things like nitrous, or maybe an avid ricer such as yourself who is such a devoted member to tuner sites might know it better as "NOS." Anyone will agree that MSD make some of the best ignition parts out there and they are what??? What kind of parts??? AFTERMARKET!!! But keep up the unburned fuel and backfires, it seems to be working out well for you and your shitty ignition.

I guess name calling and personal attacks prove your point.

MSD ignitions are a great improvement on distributor cars, but we are talking about COPs. More energy does not give you a "hotter, better" spark, it allows the spark to jump the gap when under pressure (or jump a longer gap). If you add more energy to the same gapped plug that was already firing (ie no blow out) there are no gains to be had. This has been proven over and over. This is my last post in this thread. Do some research on COPs and you will see what i'm saying is true.

[quiksilver225]

Originally Posted by Trick Tuners I must have missed it. I'm talking about real data, not some guy on the net that says there are LOTS of proof. Post up dyno sheets or track times please. I guess name calling and personal attacks prove your point. MSD ignitions are a great improvement on distributor cars, but we are talking about COPs. More energy does not give you a "hotter, better" spark, it allows the spark to jump the gap when under pressure (or jump a longer gap). If you add more energy to the same gapped plug that was already firing (ie no blow out) there are no gains to be had. This has been proven over and over. This is my last post in this thread. Do some research on COPs and you will see what i'm saying is true.

thanks for the lesson! but no one here is interested in using the MSD COPs to increase their gap size. People are looking for better ignition parts. MSD COPs are some of the best! Again, if your COPs are a big POS then your not gonna spark very well at all are you??? Good Ignition=Better Performance!!! I dont give a shit if it shows up on your dyno sheet or not. Sorry if that wasn't JDM enough for you

[Drgnracin72]

if youve got to get coils, get the msd. the gms will fuck up eventually. on my buddies 500+ rwhp bullitt, they really made it run good when we first put em in, but after about 700 miles, stuff started getting shitty, and we put the stock ones back in and it clenaed right back up again. def not worth the money and they are failing all over the place. lots of people are having lots of problems with them

[quiksilver225]

Originally Posted by drgnracin72 if youve got to get coils, get the msd. the gms will fuck up eventually. on my buddies 500+ rwhp bullitt, they really made it run good when we first put em in, but after about 700 miles, stuff started getting shitty, and we put the stock ones back in and it clenaed right back up again. def not worth the money and they are failing all over the place. lots of people are having lots of problems with them

ive heard that be4 too! MSD is definatley the way to go. Also, if u got enough miles you might as well just buy the whole set of 8 instead of having to replace them one at a time as the go bad... Just keep the old one in case one goes bad fo a temporary fix.

[White99stang]

unless you already have alot of aftermarket mods and you are running our of stuff to buy there is really no point in buying them. Our stock coils with the right plugs fire just fine. I never had spark blow out with my 150 shot with 2 stage colder plugs. If you are wanting these on a mostly stock car especially save your money for something else. All the money i have put into my car and my stock ones are doing just fine. I think i can find another place to spend 300 bucks.

[quiksilver225]

Originally Posted by White99stang unless you already have alot of aftermarket mods and you are running our of stuff to buy there is really no point in buying them. Our stock coils with the right plugs fire just fine. I never had spark blow out with my 150 shot with 2 stage colder plugs. If you are wanting these on a mostly stock car especially save your money for something else. All the money i have put into my car and my stock ones are doing just fine. I think i can find another place to spend 300 bucks.

couldn't agree more

[cliffyk]

Most aftermarlet COPs for the 4.6L 2V, that look like the OEM units (and maybe the OEM COPs too), are manufactured by a company named Micro-Tech. If you examine them side-by-side you can see that the coil housing moldings are identical, right down to the mold separation lines.

They are made to the buyer's specifications, but also within the limits of the basic OEM design package; nonetheless they are all basically the same with a voltage capacity of 40 kV to 60 kV.

Interestingly, although there are differing materials and design that can be used for the coil core and windings to effect the peak output voltage, there isn't much that can be done to alter the total available energy (in joules).

Here's the secondary waveform of a typical, idle speed, sparkplug firing event:



The firing event consists of a voltage build-up sufficient to ionise the plug gap, the actual spark which lasts as long as there is sufficient energy to sustain the spark, and then residual oscillations as the remaining energy is dissapated.

The voltage required to ionise the gap and sustain the spark is affected by a number of things, but mostly combustion chamber pressure and gap. The higher the pressure, due to higher compression ratios, forced induction, or engine speed, and the wider the gap, the more voltage will be required to fire the plug.

On any reasonably "streetable", pump fuel engine, with factory spec plug gaps the maximum voltage required to fire ionise the gap will be no more than 30 kV, typically 20 to 25 kV even at WOT at high speeds--the "burn" voltage will be 6 to 6 kV.

This is why the OEM coils are fine for any bolt-on n/a setup, and lower boost f/i applications.

When you get beyond there some of the OEM look-alike coils offering 60 kV potential can help things out--however to do it right Sniper has these 80 kV babies...



BTW: I am running Accel COPs, got 'em at a swap meet in Daytona as "new, old stock" for $100. They've got about 30k miles on them and work fine--they also had no affect on performance, but they are yellow and look pretty.

[thewayshemoves]

I know this is old, but how exactly can you tell if your coil packs are fuckin up? I mean if mine were fucking up I'd buy the 300.00 msd ones instead of the 600.00 ford quoted me.

[SWEET2KSTANG]

your car will start misfiring. it will throw a code for a misfire, and it will even say which one it is.