gavinvr6 0 Posted December 8, 2009 Report Share Posted December 8, 2009 right guy's i get the principle behind a coilpack but can someone please confirm thing's or correct me if im wrong. the way i see it is:ecu send's a signal to the ignition control module that then sends it to the relevent coil. this signal being say 1.5v, the coil inside the coil pack then amplifies the signal to the 20 thousand volts or what ever it is that gets sent to the plug to create the spark.would sending a stronger signal to the coil of say 3v cause the amplified signal to increase relevent to the multiplication of the 1.5v signal or woould that involve one of these high power coil's.or would daisy chaining or using 2 coil's per cylinder give double the original output or a single coil. Link to post Share on other sites
RAPgolfvr6182 2 Posted December 9, 2009 Report Share Posted December 9, 2009 in theory more power ur supply to the coilpack the more it will produce on the output side but this will only happen to a certain point i.e like a generator, but it will be limited by the size of the coil in the pack Link to post Share on other sites
jesterwalker69 0 Posted December 9, 2009 Report Share Posted December 9, 2009 20,000 volts??? Link to post Share on other sites
The Monk 50 Posted December 9, 2009 Report Share Posted December 9, 2009 23,000 Volts.Held onto one and earthed myself the other night.....not a pleasant experience. Link to post Share on other sites
gavinvr6 0 Posted December 13, 2009 Author Report Share Posted December 13, 2009 thought they was bout 20k i know they hurt i took a whack off one a little while ago. high performance coil packs can be 60k voltsso if i get this right by doubling the input voltage the output voltage would double, but only if the coil is able to ramp it that high other wise regardless of how many volts i put in its limited the the coils ability to multiply the signal. as its basically a voltage multiplierany automotive sparky types who have tried a modified input voltage that can answer this? Link to post Share on other sites
bungy 2 Posted December 13, 2009 Report Share Posted December 13, 2009 I thought a coil pack was a transformer full of copper coils, but i'm not sure. My understanding was it was a step up transformer. 12v - 20kv. As it is designed to operate at this parameter if you increase the input, the output will also increase untill it reaches it's threshhold and not increase any more due to losses. As you increase voltage you'll increase resistance and heat, and lower current. Not sure how long it would last if you did this. Link to post Share on other sites
thegoth 5 Posted December 13, 2009 Report Share Posted December 13, 2009 My understanding matches Bungy's. Also of note is that it's not the voltage which is amplified, it's the change in voltage. Link to post Share on other sites
rodney 17 Posted December 13, 2009 Report Share Posted December 13, 2009 Sir, you are not to far off the mark..the more important factor being an electrical engineer is that the pac isnt rated for the extra heat. So it will catch fire... Or more acurately the componates are not able to handle the levels involved and thus will heat and if they dont fail due to heat then you will have a fire... If you want to upgrade do it properly and get the correct internal parts (or product) capable of dealing with such ignition requirements. The impeadance of the cable & Pac is more important than the resisitance and in line with the increased voltage and thus lower current the joining of two coil packs will simply not benefit you in anyway and would infact decrease values needed by the plug. If you were to look at this them a parallel configureation. It would be a better option to ensure appropriate spark generation at the correct time was in place. However the parallel path would not benefit the voltage level needed as it would dilute the efffects.. So in summary buy a performance pack.. Also you only need a spark to ignite. The mix and chamber are much more important than the ingnition device, if it is more power route you are looking at. A correct set plug gap will give you more spark and is often overlooked..Hope this helps a little.. Link to post Share on other sites
bungy 2 Posted December 14, 2009 Report Share Posted December 14, 2009 ^^^^^^^^^^This is why I love this forum, everyday is a school day and i've just learnt a little more Link to post Share on other sites
craggsy 91 Posted December 14, 2009 Report Share Posted December 14, 2009 All wrong about the coilpack............they work by capturing the magic Fairies that make electricity.......which in turn gets passed on to the elfs who up the power.Come on people FACTS only!!!!! Link to post Share on other sites
AJmk2 2 Posted December 14, 2009 Report Share Posted December 14, 2009 The voltage going through the coil is already its maximun of 14v. The ECU sends a control voltage operating a transistor switch which puts the full 14v through the coil.This cant be increased anymore. Link to post Share on other sites
gavinvr6 0 Posted December 15, 2009 Author Report Share Posted December 15, 2009 the spark is rated at roughly 20kv, this i know.i understand the need for correct size spark and also understand that the stock coil should be changed not tried to force more through it, otherwise companies like msd wouldnt exist. this is not a thread to figure out a way to force more volts out of my coils as i know that it will max out, probably just above 20kv and just melt it's internals, the question im trying to get answer's to is how the signla from the ecu is amplified from whatever it is upto the 20kv, more for an understanding than a way of trying to get better spark, i have always run correct size plug gap and decent plugs and lead's as this give's a more efficiant spark.say 3v signal from the ecu as well as a constant 12v live, i know there is 2 live lines and one earth to the ignition control module on top of the coil pack. now does the 3v signal from the ecu trip some sort of switch inside the icm which sends the 12v into the relevent coil which then amplifies it to 20kv. and how is the figure of 20kv acheived by the coil, would larger or more winds of wire create a higher voltage. i mean after the signal/feed is amplified im damn sure the ecu cant do nothing about it so its got to be regulated by the coil itself. Link to post Share on other sites
AJmk2 2 Posted December 15, 2009 Report Share Posted December 15, 2009 The formulaes for spark generation are : Energy = (0.5 x inductance ) x current^2Inductance is a property of the coil dependant on the material used I believe.So therefore more energy can be generated in the spark by lowering inductance ( different coil pack ) or increasing the current. So then you need to look at how current is generated.Current = (Voltage x Dwell time) / Inductance Dwell time is the time gap between sparks being needed. The current continally builds up over this period. This is why the car has one coil per cylinder is to give larger time gaps. If it had just one coil it would have to spark every cylinder and therefore have a 6th of the time to build up current. The problem is you need to balance the ratio of current to the resistance in your coils. Link to post Share on other sites
thegoth 5 Posted December 15, 2009 Report Share Posted December 15, 2009 Good info there AJ. Although technically a VR coil pack has one coil per two cylinders which both spark at the same time, one spark being redundant.It seems ironic that the single coil on my dizzy engine had a far greater operating life than most coil packs although it was doing three times the work. Link to post Share on other sites
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