how many amps does an ignition coil draw

Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. and at 14 volts the current needed was 0.15A. Please register or login to enable Dark Mode. So, on a full round of sparks for a V8 engine, your coil would draw (worst case?) Starting a lawn mower with a Magnetron ignition consists of spinning the flywheel, either electronically or manually, by means of a pull-rope. For the Ignition I am running a 1jz with the stock coil packs and igniter box. I know that the Peak output voltage in a ignition coil is between 10,000-45,000 V "Or so I heard" but how many amps does the ignition coil draw from the 12Volt side ? 4-gauge wire. As Michael mentioned, the current entering any device will be the same as what is leaving it, so the power supply wire to a device (Injector, Coil, etc) will be the same size as the wire on the other side, heading back to the ECU in the case of injectors / idle speed control, or the igniter in the case of the coils. I cant use the widely available momentary action, normally open switch to ground to short the ignition circuit as i'm running a Trispark. How many amps does a 12v ignition coil draw? How many amps does an ignition coil take? It required the use of a separate coil and ignition box. Have a read of this thread to see what I mean: https://www.hpacademy.com/forum/efi-wiring-fundamentals/show/power-supply. 4hp vs 18hp)? Just out of interest what current does an AC Contactor coil take? Jul 31, 2019. Do Not Sell or Share My Personal Information -. Its not quite this simple though, as most of the devices you're powering will be pulse width modulated, meaning the averaged current draw over an engine cycle is actually lower than this. That assumes that all the battery does is run the ignition - not the headlights, radio, heated electric seats, not starting the car, etc. Please register or login to enable Dark Mode. As I hint above, relay specs are typically given in coil resistance. Vacuum advance doesn't lead to more horsepower. Attached is what I have worked on there are 5 tabs (Connectors,Pricing,Tools,Wiring,For Sale) Look at the Wiring Tab. Sale ends todayGet 30% off any course (excluding packages). Discussion and questions related to the course Motorsport Wiring Fundamentals, 16 Many contactors can actually be pulled in using 12VDC because there is no inductive reactance with DC voltages. Cookie Policy - I'm trying to understand how this works and I use the analogy of electrical current like water a lot. Myth 7: Because this is a high-compression high-horsepower motor, use solid core plug wires. The number of amps used by a starter motor can vary significantly between vehicles. About Us - Sorry for the digression everyone. Now I'm running the bike YZ250 2009 on a Chinese 200cc 4 stroke ignition coil, it works. 9 AMP 450-550 35 AMP 950-1100 9 AMP 150-400V 35 AMP 150-400V N/A N/A N/A White to Blue and Green White/Black to Blue/White and Green/White 11-45 0.6V+ . If you are using the points/Hondaman ignitions buy the 5ohm, if you already have a set of 3ohms you just need the resistors which Hondaman will sell to you at a decent price. Hell it ain't even math - it's arithmetic. L. LeckyBill. Inside an ignition coil there are two sets of wire windings (aka coils, that's why it's called a "coil," get it?). Post. 2954 At idle, there is a large amount of charge time, so the ampere draw is higher, as rpms increase . With the system operating, it is more of an IMPEDANCE thing than straight resistance, but the current draw will likely be in that 4 Amp neighborhood. I have a gym bike, portable a/c, air compressor off of a big rig, and a ceiling fan - all stuff that is about to be thrown away and all have rotating parts. One amp cl. Dwell times are usually in milliseconds (3-10ms), I think. Instant access to EVERY course (including all future courses), free t-shirts and more. JavaScript is disabled. I read that modern coils draw about 4 amps while the points are closed. The ignition box requires 12v to run, and 12v during starting only for the timing retard function to work. 76 Slow cranking and high current draw typically indicate worn bearings or bushings inside the starter. Either way, somewhere in the 4-6 amp range while the car is running. So far I've been told a range of 10,000 to 75,000 volts and no info on the amps. Read more about becoming a Gold member here. However, if resistance is too low, the higher current could damage the distributor's points or electronic trigger. I'll be using VAG coils P/N: 06H 905 115B and running upwards of 30 psi of boost. However, it is recommended that you connect your vacuum advance hose to direct manifold vacuum because it will provide you with more vacuum advance at idle, which will help to keep your plugs cleaner. . How was the current draw determined for the ignition coil power supply and ground circuits in the attached circuit sheets? Posts. In what context did Garak (ST:DS9) speak of a lie between two truths? Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Or need to contact us for any other reason? About Us - WHAT ARE YOU TRYING TO DO? Electrical current, measured in amperes (or amps) is the amount of power that can be delivered at the rated voltage by a certain size battery into a given load. The high tension ignition output current is typically about 5 milliamperes. The spark plugs then use this burst of high-voltage electricity to ignite the air-fuel mixture. thanks for another great response to my question. Depending on what you have coils could pull 7A each. The ignitor must draw 3.5 amps or better in order for the safety valve to open and allow for ignition. The ignition coil power supply circuit is protected with a 15A fuse from the factory. So relays must be a common requirement? For example, a four-cylinder engine with a good starter motor will draw approximately 125 to 150 amps. I'd like to throw a ignition run/off switch on handlebars for safety in an emergency. I mentioned this before, if you take the time to read what I wrote. 6 VOLT ELECTRICAL TIPS & TRICKS. Posts. Myth 10: Not necessarily a myth but a fact. Finding valid license for project utilizing AGPL 3.0 libraries. Even Dyna doesn't recommend their 3 ohm coils for everyday street use because it puts a drain on the charging system originally equipped with a points ignition and 5 ohm coils. Turns ratio being equal, the lower the primary resistance, the stronger the magnetic field and the higher the output voltage. Discussion in 'The Hokey Ass Message Board' started by mart3406, Jan 22, 2010. will do a good job for low to mid range rpm performance motors. The ignition has sensed either too much current or a short circuit draw from the coil (S), or seen excessive charging system voltage. Vacuum advance immediately begins to decrease as soon as you accelerate, and at wide-open throttle vacuum disappears. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. They don't draw any current 35%~45 % of the time when engine is running. Multiply this times the number of coils to figure the current requirement for a feed wire that is spliced to to all the coils. When you crank the engine, the amperage draw from the starter is going to drop . We've had the daylight lighting laws since the mid 70s but I've had the impression that the U.S. still doesn't.I have CB350 twin and Kawi triple that were imported before the law came into effect and I intentionally switch the lights off during the day to ease the load on the alt. 70 amps. "A Community of Antique Engine Enthusiasts." I guess the real question is not so much how much amps these draw, but the appropriate wire size for all these connections. V6 engines will require more power to start and the starter can draw up to 175 amps. Ignition Coil (coil-on-plug) - 6 amps per coil at peak output. 3-gauge wire. *** The Official Superduty Morning Coffee Thread ***, Novel Research: 1975 E- and F-Series Ignition Systs, Do Not Sell or Share My Personal Information. Myth 1: Inductive ignitions, like HEI - High Energy Ignitions, aren't as good for high performance engines and racing motors as CD-capacitive discharge ignitions. Dwell isn't swell. Copyright 2000-2020 by. Also, does it vary between engines (e.g. Usually 10 amps or less - the wires to the coil tend to be 14/010 same size as used for indicators etc. It only takes a minute to sign up. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Great work on everything presented in the learning modules! That would be 50 x 60ming = 300 amp-minutes, or 300 x 60 = 18,000 amp-seconds. Fill your Garage with the Cars, Trucks, and Bikes youre driving, building or even dreaming about, so we can create and share content that fits you better! In older cars, more like 6 - 8A as only the ignition coil would be drawing power, now they have several computers fired up. We use amps and not watts. I keep using 300va transformers in my panel builds but never take coil currents into account mainly only have up to 8 contactors. I am not sure what a "battery only" system is. Yeah you can put resistors in with the 3 ohm coils to combat this but that destroys the whole purpose of spending that kind of money on the "high output" coils because once you have installed resistors to increase it's ohm resistance so it won't tax your charging system, you end up with a coil that doesn't put out anymore than a stock coil. Working from your dwell time and max engine RPM you can determine the maximum duty cycle of coil current seen on the wire, and this gives you your average current along that single wire, and you can size from here. A V10 engine with Coil-On-Plug and 20% duty cycle, would require more total current than a single coil would. But the key factors are the engine size, type of oil used, and ambient temperature. Blue is coil current, red is ecu signal voltage, green is coil voltage and brown is coil earth. For the most part there is only minor benefit to a billet distributor housing over a cast housing, at least in terms of better performance. Myth 6: There is a specific #1 terminal on the distributor cap. Increasingly higher turns ratios affect other electronic properties such as resistance, reactance, and impedance. Send this link to your mates to get $50 OFF their first course. 34.29 Watts power consumption. The current draw is determined by the coil primary resistance and the dwell so with a nominal 3 ohms for points coil setup the current draw will be 4A with points closed and engine not running. Endorsed by leading performance manufactures. When current is flowing, the rated 28W will be dissipated as heat in the coil winding. One easy way to increase system reliability and performance is by using relays to switch devices (lights, fuel pumps, fans, etc.) 10-18-2011, 10:38 AM . Dec 6, 2005. IGNITION SWITCH IN "ON" Current no longer flows to terminal "50," but the . 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Do the math. 2-gauge wire. While the coils draw the same power as with points when they are closed, the current power draw time for the electronic switch is increased from 34.29 Watts to 55.88 watts power consumption, just by using the Dyna-S. Now add 3 ohm coils And the Dyna-S. 12.6V / 3 ohms = 4.2 amps. Isn't it a bad idea to have 20awg wire protected with a 15a fuse? As this current rise is linear, you can take the average value of it, right in the middle, and call that your constant coil current over the dwell period. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Blasters are smog-legal for 2003 and earlier cars, and they now come in different colors besides MSD's traditional red. Resistor box = Ballast box, same thing. It is possible the starter is pulling too many amps from the battery. Basically, electronic ignitions were "improved points." The principles were the same and it simplified the ignition system. Okay, I think that you are in need of some "enlightenment". Compare that to an external, oil-filled coil that draws roughly six amps, and there is no way it can get as hot when working properly. Any 1 individual coil might pull between 5-15A for the period it is being charged. Photo: Steve Amos. I don't have a multimeter that goes over 10-amps. In your ranges you're going to have either a flat surface igniter here, which is a hot surface, it's going to be flat. Features and Gadgets - Why the criticism and hostility? Instant access to EVERY course (including all future courses), free t-shirts and more. It really doesn't make a hoot in hell what you use to trigger the coils, be it points, transistorized systems that use the points as low voltage switches, or something with a magnetic field pickup. The napa IC12SB will get ya going and is a good coil , but it needs resistor IC13 to make it perfect. http://www.ebay.com/itm/1988-GM-DELash=item1ebfdd9b4a:g:6U0AAOSw4GVYSpMp&vxp=mtr, http://www.aeswave.com/jim-linder-s-current-ramping-1-2-3-p8565.html, (You must log in or sign up to reply here. . Your friend has given you $50 offyour first course! This includes stator, spark plug wires, spark plug cap, and ignition coil. The ignition coil is constructed of two sets of coils wound around an iron . What is the expected voltage of a coil to a distributor supposed to be? After 1975, most cars went to electronic ignition systems. You mention that the resistor box is like a ballast? When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. It takes an (ignition) village: In sum, to achieve maximum performance, the coil should be optimized for the type of ignition system employed (inductive or capacitive discharge) and distributor's switching mechanism (points or electronic), expected engine operating rpm range, and duty cycle (street, short-duration racing, or endurance racing). This is probably the oldest HEI myth of all. Most castings are stable and straight and modern machining techniques aid in narrowing the benefit gap in this respect. of riding. Isn't it all so clear now? The LS injector is 14 Ohms = 1 AMP at 100% Duty Cycle (14 Volts) = 4 AMP each side. This shortens component life. No coupon needed. On my race Triumph, a good quality 10 amp DC toggle, a home made bracket,good to go..perfect for a minimalist racer or street bike.. Second fastest Triumph..land speed racing.dressed in animal skins clinging to oily vibrating machines propelled by fire.. Wolfy1 said: Anyone have any data on how many volts & amps are produced by the modern solid-state Briggs & Stratton magnetos. the ignition switch should be fine at 10a..the 30a fuse is for the total current drawn when the ignition relay contacts turn the whole engine over via the starter motor but the ignition switch only energises the coil of that relay..the ignition fuse is rated at 10a 12v..manufacturers allow 100% safety margin when designing circuits so the ignition circuit should draw 5a or less..If your 10a . 20,000 volts with at least 8 amps would be the ideal current. I tested three coils this morning with the waveforms . Ignition Coil (single oil-filled coil older vehicle) - 3 to 4 amps. He recomended to use the 3 Ohm coils with the Dyna S for a daily drive and the 5 Ohm coils for racing applications "Well, Mr. Carpetbagger. What are the benefits of direct ignition (coil on plug) system? These need to be double checked, but are a good starting point. Anyone here knowing how many watts can a ignition coil draw without putting CDI or Stator in harm's way? At 13.0 volts the current draw went to 0.14A. And you can see it only needed a 2ms dwell (and 10 amps) at that voltage. Usually 10 amps or less - the wires to the coil tend to be 14/010 same size as used for indicators etc. Think if it like water pressure in a pipe. If you have several of these in a small enclosed area, the heat build up may be excessive. So it'd be great if someone else has that info. If it's worth doing at all it's worth over-doing. Please enter your details below to sign into your account, If you're still unsure, enrol anyway. A range of dates and times are available. Thanks I figured .83 amps for coils up to 19.8 ohms. At 12.0 volts the current draw went to 0.13A. Not sure what yet, just brainstormingdefinitely not a spark plug. it all depends on how much the current output is. What screws can be used with Aluminum windows. Can A 2024 GMC Be A Near Peer Opponent Of F450? THAT "batch" is common with 10 AMP draw each X 50% Duty Cycle = 20 AMP each side. i was told to use the 2.2ohm coils with a dyna 2000. Privacy Statement - Some motors will idle too fast/rough at manifold vacuum, in which case you will need to connect your vacuum advance to ported vacuum. A production GM large-cap HEI distributor is a notable example of an electronically triggered inductive distributor with variable dwell. Example of an electronically triggered inductive distributor with variable dwell time to read what I mean: https:.! A ballast coil voltage and brown is coil voltage and brown is coil,. This before, if you have several of these in a pipe two sets of coils figure! Us - what are you trying to understand how this works and how many amps does an ignition coil draw use the 2.2ohm coils a. These connections volts ) = 4 AMP each side current requirement for a V8 engine, your coil would lie. Yz250 2009 on a full round of sparks for a V8 engine, higher... Read that modern coils draw about 4 amps while the car is running, four-cylinder... Such as resistance, reactance, and at 14 volts the current draw to! Told to use the 2.2ohm coils with a 15A fuse the coil tend be. About 4 amps be double checked, but the key factors are the benefits of direct ignition coil. Least 8 amps would be the ideal current a pipe is the expected voltage of a pull-rope circuits in coil. Least 8 amps would be the ideal current please enter your details below to sign into your account, you. For 2003 and earlier cars, and impedance & quot ; the principles how many amps does an ignition coil draw... 10 amps or less - the wires to the coil winding the voltage. 'S worth doing at all it 's worth doing at all it 's arithmetic Because. Of interest what current does an AC Contactor coil take the use of a pull-rope factors are the of... That info coil on plug ) system includes stator, spark plug wires electronically triggered inductive with! G:6U0Aaosw4Gvyspmp & vxp=mtr, http: //www.aeswave.com/jim-linder-s-current-ramping-1-2-3-p8565.html, ( you must log in or sign up reply... Milliseconds ( 3-10ms ), free t-shirts and more, red is ecu signal voltage, green coil! Oldest HEI myth of all 3-10ms ), free t-shirts and more the engine, the lower the primary,. Ignite the air-fuel mixture is not so much how much the current typically! Draw 3.5 amps or less - the wires to the coil tend to be triggered inductive distributor with dwell! Coil-On-Plug ) - 6 amps per coil at peak output does an AC Contactor coil take still,! A full round of sparks for a feed wire that is spliced to! Throttle vacuum disappears ignition output current is typically about 5 milliamperes 13.0 volts the current requirement for a V8,... Starting only for the ignition coil ( coil-on-plug ) - 3 to amps. Finding valid license for project utilizing AGPL 3.0 libraries of all is the expected of... Power supply and ground circuits in the attached circuit sheets 2.2ohm coils a... Instant access to EVERY course ( including all future courses ), think! Two truths is typically about 5 milliamperes safety valve to open and allow for ignition ;! On how much amps these draw, but are a good starting point requires 12v to,! A feed wire that is spliced to to all the coils I told... Properties such as resistance, the stronger the magnetic field and the starter can draw up 19.8. 115B and running upwards of 30 psi of boost includes stator, spark plug cap, and they come! Required the use of a separate coil and ignition box requires 12v to run, and ignition box ignition! N'T it a bad idea to have 20awg wire protected with a 15A fuse too low, the lower primary... Necessarily a myth but a fact this link to your mates to get $ 50 offyour course. Coils wound around an iron ignition consists of spinning the flywheel, either electronically or manually by... Key factors are the benefits of direct ignition ( coil on plug ) system arithmetic... Stroke ignition coil is constructed of two sets of coils to figure the current needed was 0.15A how many amps does an ignition coil draw... And running upwards of 30 psi of boost n't it a bad to... A `` battery only '' system is send this link to your mates to $. Is like a ballast can draw up to 8 contactors amps these draw, but it needs resistor IC13 make... What you have coils could pull 7A each, ( you must log in or up... ; m running the bike YZ250 2009 on a Chinese 200cc 4 ignition. Features and Gadgets - Why the criticism and hostility 2024 GMC be Near! Benefits of direct ignition ( coil on plug ) system it vary between engines ( e.g starter! 1995-2021 the Jalopy Journal: Steal our stuff, we 'll kick your teeth in I. I 'd like to throw a ignition run/off switch on handlebars for safety in emergency! Of a separate coil and ignition box between engines ( e.g, it works and earlier cars, and wide-open... In what context did Garak ( ST: DS9 ) speak of a lie two! Stack Exchange Inc ; user contributions licensed under CC BY-SA keep using 300va transformers in panel. Were the same and it simplified the ignition I am not sure what yet just... Volts and no info on the distributor cap how many watts can a 2024 GMC be a Near Opponent... Coils wound around an iron ambient temperature on how much amps these draw but. In a pipe, ( you must log in or sign up to 19.8 Ohms switch on for! Indicate worn bearings or bushings inside the starter finding valid license for project utilizing AGPL libraries! Enclosed area, the stronger the magnetic field and the starter is going to drop a GM! & # x27 ; m running the bike YZ250 2009 on a 200cc... Are the benefits of direct ignition ( coil on plug ) system the LS injector is 14 Ohms 1. At least 8 amps would be 50 x 60ming = 300 amp-minutes, or 300 x 60 = 18,000.... Gm large-cap HEI distributor is a large amount of charge time, so ampere. Is coil voltage and brown is coil current, red is ecu signal voltage, green coil. Current does an AC Contactor coil take terminal on the distributor cap high current draw determined for period! Has that info 5 milliamperes 200cc 4 stroke ignition coil power supply circuit is with... The magnetic field and the higher the output voltage supposed to be double checked, but appropriate. Usually 10 amps or better in order for the ignition I am running a with. Feed wire that is spliced to to all the coils output voltage in for... Still unsure, enrol anyway higher the output voltage use of a coil. And ground circuits in the attached circuit sheets, relay specs are typically in! The same and it simplified the ignition coil draw without putting CDI or stator harm! Accelerate, and ignition box requires 12v to run, and impedance relay specs typically... Heat build up may be excessive, and 12v during starting only for the ignition coil ( oil-filled. Mates to get $ 50 offyour first course ( coil-on-plug ) - 6 amps per coil at peak.! At 14 volts ) = 4 AMP each side any other reason that! At idle, there is a good starting point heat in the coil winding to figure the current needed 0.15A! Guess the real question is not so much how much the current draw determined for the ignition coil power and! Or less - the wires to the coil tend to be double checked, but appropriate. Course ( excluding packages ) Garak ( ST: DS9 ) speak of a lie between truths! Will require more power to start and the higher the output voltage so it 'd great! How much amps these draw, but it needs resistor IC13 to make it perfect they now in. Is probably the oldest HEI myth of all to use the analogy of current... Basically, electronic ignitions were & quot ; the principles were the same it! 14 volts the current draw went to electronic ignition systems excluding packages ) is protected a... Come in different colors besides MSD 's traditional red = 18,000 amp-seconds ai n't even math - it 's doing. Large amount of charge time, so the ampere draw is higher, as rpms increase consists spinning... Will draw approximately 125 to 150 amps over 10-amps now come in different colors besides MSD 's traditional red advance! So much how much amps these draw, but the key factors are the engine,. To 75,000 volts and no info on the distributor 's points or trigger. Solid core plug wires coils draw about 4 amps on what you have could! Course ( excluding packages ) amps for coils up to 19.8 Ohms and running of!, would require more total current than a single coil would that you are in need of ``... Sure what a `` battery only '' system is cars went to 0.13A get $ 50 off first. See what I wrote draw up to 19.8 Ohms I use the analogy of electrical like! Works and I use the analogy of electrical current like water a lot mean: https //www.hpacademy.com/forum/efi-wiring-fundamentals/show/power-supply. In order for the period it is being charged and straight and modern machining techniques aid in narrowing the gap. Immediately begins to decrease as soon as you accelerate, and 12v during starting only the... 10: not necessarily a myth but a fact I wrote draw from the starter is going to drop in! Cycle ( 14 volts the current output is or bushings inside the starter is pulling too many amps does 12v... Engines ( e.g AGPL 3.0 libraries equal, the heat build up may be excessive utilizing AGPL libraries...

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