The reason you will only find rough estimates is that the resistance is not really what matters. Ssshhhhh Unlock exclusive FREE content just for our subscribers, Join an exclusive FREE class on your favourite topics, *pick one of the above options to close window, Get 30% off any course (excluding packages), Determining current draw for ignition coil and selecting wire gauge, Practical Motorsport Wiring - Professional Level, https://www.sxoc.com/vbb/showthread.php?584905-A-quick-how-to-use-VAG-coil-on-SR20. This firing ability also allows wider spark plug gaps-in the vicinity of 0.050-0.055-inch. If oil starts leaking out, it's a sign that the coil's days are numbered. Smallish reed relays with 12V coils are in the 12mA range. Ranges from three to three and a half amps, and then you're going to also have a round and other manufacturers. This discussion concerns the ignition coils used with the HEI. How many amps does a 12v ignition coil draw? Photo: Marlan Davis, Charging ahead with CD: One way around this is a capacitive discharge (CD) ignition system. What kind of tool do I need to change my bottom bracket? As the amount of charge time between firing intervals of the coil decrease, the loading also decreases. When battery current flows into the primary windings, it produces a magnetic field. Btw, specifically on an ignition coil, be aware that less than "3" Ohms on these old bikes is an absolute no-no - lower resistance (Ohms) increases the Amps draw (in your case through the Tri-Spark e.i. The basic ignition system consists of the ignition coil, points . That assumes that all the battery does is run the ignition - not the headlights, radio, heated electric seats, not starting the car, etc. The 12AWG wire probably reduces in size when it splices out to each individual coil. The lower amperage draw results in a much cooler running HEI coil. How many amps does a 12v ignition coil draw? When the spark is required, the a "switch" is opened. will do a good job for low to mid range rpm performance motors. The concept is simple - Ohms equal resistance. Join our newsletter for exclusive FREE content including 04 Lexus ES330 Multiple Ignition Coil Failures / Poor Coil Feedback Signal. About Us - https://www.applianceaid.com/ Appliance Repair Aid It's OK to talk to yourself.and OK to answer yourself. If you don't run 12,000 RPM, then this number would be proportionally smaller. You must log in or register to reply here. 100ms/rev x 1000rpm = .001sec/rpm x 1000 rpm = 1 sec of current draw at 4 amps per minute while running at 1000 rpm. With a 100:1 turns ratio and, for example, an initial 250-volt current-interruption spike, in theory there would be a spark output of 25,000 volts (assuming no losses to resistance). The ignition has sensed either too much current or a short circuit draw from the coil (S), or seen excessive charging system voltage. For a better experience, please enable JavaScript in your browser before proceeding. 85 amps. Posts. coil"). The Duraspark itself won't draw much current. Learn more about Stack Overflow the company, and our products. 16 would probably work but it doesn't hurt to go bigger. To help cool them down, traditional cannister-shaped coils are oil-filled. (<-- DYNA-S and 3 ohm coils). The ignitor must draw 3.5 amps or better in order for the safety valve to open and allow for ignition. I tested three coils this morning with the waveforms . Privacy Statement - 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. If you measure the resistance of one of the resistors in your resistor box, and then add in the resistance of your injector, you have your R value to work out your peak current. As mentioned, it's not going to exceed ten amps anyway. 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. Plus, you know, calculus. Since this system produces more voltage and amperage output than a point-type ignition, it requires a larger-diameter cap to prevent voltage crossfire inside the distributor cap. 10-18-2011, 10:38 AM . Point Type Ignition Systems. You can then check the ignition box also. Always size your wire and it's length to the current demands. ** It has been pointed out I was a little HARSH in my original wording**. When a switchthe distributor points opening or an electronic triggerinterrupts the flow of battery current, the magnetic field collapses across the secondary windings. Dwell times are usually in milliseconds (3-10ms), I think. The fact that the duty cycle is low (20%) and that only one coil is firing at a time makes me think that would be ok. Am I right ? Do you mean general ignition power relay or just for the coils? Determining current draw for ignition coil and selecting wire gauge . Next I calculated the duration for each engine cycle at peak engine speed. Does anyone have any idea as to how many milliamps. I keep using 300va transformers in my panel builds but never take coil currents into account mainly only have up to 8 contactors. They range from two and a half to three amps. Best Bros: There is also an often-overlooked change in coil behavior when used with a CD system. The benefit of wider plug gaps is a more complete burning of the fuel mixture. Take a look and see what you think. To measure this properly, you're going to need a 5Watt 0.1Ohm resistor, and an oscilloscope. As its name implies a "capacitive discharge" system uses a separate capacitor to store energy at a high voltage threshold (as much as 580 primary and 50,000 secondary volts in an MSD 8-Plus, for example), which is then discharged through the ignition coil. My first post here. (usually expressed as milliamps; 1 milliamp = 1/1000 amp). Pin 3: Spark Signal from ECU (from MS3X or via buffer) Pin 4: Power ground (connect to engine block) * based on latest information. Does Chain Lightning deal damage to its original target first? 20,000 volts with at least 8 amps would be the ideal current. I am trying to figure out the amperage draw on multiple components so I can determine the appropriate size wire. For instance, MSD's E-core and U-core coils have proven to be more efficient than traditional canister configurations for radiating heat while stepping up the voltage between windings, due to their smaller and more enclosed area where the field collapses. What information do I need to ensure I kill the same process, not one spawned much later with the same PID? . Similarly, other factors also determine the number of amps. In older cars, more like 6 - 8A as only the ignition coil would be drawing power, now they have several computers fired up. Ignition Coil (single DIS coil newer vehicle) - 5 to 6 amps at peak output. Without enough information, I'd say to figure 5A for total ignition usage. More heat, more resistance. Because the number of secondary windings is much greater than the number of primary windings, the result is a huge voltage multiplier. The coil itself is going to have about 1.5 ohms just sitting for your application. You are using an out of date browser. I think I have determined a rough estimate of voltages and amperage. Use 8-gauge for 150- to 200-amp loads more than 3 feet in length, and 40- to 50 . To estimate the current draw of a device, measure its resistance with a multimeter, and then use Ohm's law. Be sure to use "Going high (inverted)" Any 1 individual coil might pull between 5-15A for the period it is being charged. Today, we are making high-output modules and coils that saturate fast enough to fire constant at high rpm. Can A 2024 GMC Be A Near Peer Opponent Of F450? I would size my wiring for 15 amps for both, 14 gauge wire. Have a read of this thread to see what I mean: https://www.hpacademy.com/forum/efi-wiring-fundamentals/show/power-supply. 02/12/2014 8:56 AM. 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. It required the use of a separate coil and ignition box. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. When your engine is running your coil is drawing 2A from the battery MOST of the time through the shown switch which is normally closed when the ignition switch is on. I'm familiar with ohms law but have only ever used it to correlate/calculate Volts/Amps/KW conversions in 240 & 415v. Normal Starter Amperage Draw: A good starter will normally draw 125 to 150 amps, when cranking a four cylinder engine. The high tension ignition output current is typically about 5 milliamperes. 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. Great work on everything presented in the learning modules! 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. Ignition Coil (single oil-filled coil older vehicle) - 3 to 4 amps. 55.88 watts power consumption, just by using the Dyna-S. 93.14 Watts power consumption. Less time equals less current. At some point a higher turns ratio becomes counterproductive. If your car uses a negative ground and you have a coil with primary and secondary terminals, the primary winding is connected to the terminal on the coil that is marked "+" or "Bat.". The following are the 10 most common, along with some views, which are believed to dispel them. Actually no it doesn't, in fact, the silicone transfers the heat produced by the module to the distributor housing. Please register or login to enable Dark Mode. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. How many amps does a 12 volt coil draw using a 12 volt battery? 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. Thanks for an excellent response which will no doubt help others besides me ! Is there a free software for modeling and graphical visualization crystals with defects? Pretty sure the stock JZ injectors are high impedance? I'm going to have to disagree, again I saw 2A *peak* for square truck coils and there's just no way that a coil would draw 15A, so I'm thinking you just randomly chose those numbers. How can I detect when a signal becomes noisy? No coupon needed. So far I've been told a range of 10,000 to 75,000 volts and no info on the amps. For example, each injector is going to draw closer to 1A than 4A. 2-gauge wire. Attachments may only be downloaded by paid Gold members. In what context did Garak (ST:DS9) speak of a lie between two truths? Reply to joel89. very interesting discussion here, I would like to thank everyone on this info as I'm currently building a coil harness myself. HEI draw at idle, depending on the coil used, runs about 3.5 to 4.0 amps average at idle speeds, lowers considerably as the engine rpms rise. Idle Speed Controller ECU LSS - 12v @ 0 Amps. Blue is coil current, red is ecu signal voltage, green is coil voltage and brown is coil earth. Think if it like water pressure in a pipe. That would be 50 x 60ming = 300 amp-minutes, or 300 x 60 = 18,000 amp-seconds. If you know anyone who works as a lineman for a utility, you need to speak with them about this. Figure 14.5 Volts with the charging system up and working/the resistance of the coil, likely about 3.5 Ohms = about 4.14 Amps. Usually 10 amps or less - the wires to the coil tend to be 14/010 same size as used for indicators etc. I know Ricks Stators makes stators as well as electronic voltage regulators/rectifiers for older bikes but do they address the strain of 3 ohm coils? Myth 8: The silicone grease you place under an HEI module insulates from heat. On a common distributorless ignition system, the primary coil resistance may be as low as 0.5 ohm and regulating current is needed to prevent primary current from exceeding approximately 8.5 to 10 amps. Let's say you ran this coil on a 12,000 RPM 4-cycle engine (ie, so the coil fires 6000 times per minute, or 100 times per second) -- that is 10 ms per firing. Dyna states in their installation instructions that the minimum requirement for the Dyna S is 3 Ohms, but their 5 Ohm coils (or for that matter, stock Honda 5 Ohm coils in really good condition) work fine with the "S". MSD, A Holley Brand; El Paso, TX; 888.258.3835; Holley.com/brands/msd, Inductive vs. Capacitive Discharge Ignition Systems. 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! Vacuum advance doesn't lead to more horsepower. I have created a document to keep me organized and I will attach. Either 12V across a 3-ohm primary coil or 6-9V across 1.5 ohms in a ballast coil. It only takes a minute to sign up. Then there is at least some additional resistance of the vehicle wiring itself. The Module takes the place of breaker points, and it still switches current off and on to the coil. Login with username, password and session length. live webinars, video lessons and discounts on courses. Unexpected results of `texdef` with command defined in "book.cls". 14.5/1.5 = 9.66 amps x .66 = 6.375 amps, well under 8 amps. This includes stator, spark plug wires, spark plug cap, and ignition coil. We usually reply within 12hrs (often sooner). I am rewiring my ECU and Chassis Harness. Use 2-gauge cable for amp loads of 150 to 200 amps and wire lengths of 25 feet; 4-gauge wiring works for amp loads of 150 to 200 and lengths of 15 to 20 feet, though it's advised for 100 amps at 25 feet. Is it safe to assume that the main feed power wire can be the same size as one coil power wire ? #2. The CDI or capacitor discharge ignition is a trigger mechanism and it is covered through coils in a black box that is designed with capacitors as well as other circuits. Measure the ohms resistance in the primary. 4hp vs 18hp)? Although magnetic field collapse and voltage step-up appears to happen instantaneously to us mere humans, it takes some amount of time for the coil's magnetic field to generate its full potential current and voltage: time for the coil to become fully saturated; time for the coil to discharge its stored up energy to fire a spark plug. A production GM large-cap HEI distributor is a notable example of an electronically triggered inductive distributor with variable dwell. 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. 731 The lower amperage draw actually results in a much cooler running HEI coil. On the dyno or at the track, this micro adjuster for setting the timing is a boon. IGNITION SWITCH IN "ON" Current no longer flows to terminal "50," but the . Spark wise there is no difference between the two. The duration of dwell can vary depending on the type of ignition system30 degrees with most traditional points systems, but various electronic triggers can have (depending on the design) less dwell, more dwell, or even variable dwell. Manage Preferences - Archive - so does that in effect also reduce the amperage on the entire circuit? For a better experience, please enable JavaScript in your browser before proceeding. And the iron core is no longer a round tube in the new designs. Do Not Sell or Share My Personal Information -. Not sure what yet, just brainstormingdefinitely not a spark plug. it all depends on how much the current output is. Are There any Benefits to a High Voltage Coil Pack? 20 You might need to do something similar, but running 16AWG wire from your power supply point to the splice, and 20AWG out to each individual coil after that should be more than sufficient. These ratings are for standard copper NM sheathed cable, but there are instances where these amperage ratings vary. i wonder if someone can help me to cover some of the missing pieces. What are the benefits of direct ignition (coil on plug) system? All cars up until 1975 or so used a point type ignition system. Isn't it all so clear now? Terms of Service - I'd like to fabricate a motorsport grade engine harness for my B5 platform Audi A4 with a 1.8T big turbo engine. 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 . live webinars, video lessons and discounts on courses. on and off. First, you need to calculate how many amps does this heater draw like this: Current (Amps) = Power (Watts) / Voltage (Volt) In our situation this is: Current = 1,500W / 120V = 12.5 Amps Now we know that the 1,500W space heater draws 12.5 amps. Engineers refer to a coil's time-charge factor as "dwell," which is expressed in crankshaft degrees. 6 VOLT ELECTRICAL TIPS & TRICKS. And you can see it only needed a 2ms dwell (and 10 amps) at that voltage. Copyright 2000-2020 by. It's a fine balancing act juggling all these factors to come up with the right coil for the application. 1 The large cap also offers extra space to host the coil, making the HEI distributor self-contained. The spiral core prevents internal wire vibration and prevents electronic interference. 4 months ago I met a guy from Dyna at the motorcycle fair Intermot. You can also lose some spark intensity when you run a coil wire to an external oil-filled coil as the voltage has to travel a longer path, creating more resistance. "A Community of Antique Engine Enthusiasts." It's that easy. 95 amps. Also note that as voltage output increases, current output decreases. One amp cl. One easy way to increase system reliability and performance is by using relays to switch devices (lights, fuel pumps, fans, etc.) So, on a full round of sparks for a V8 engine, your coil would draw (worst case?) Many contactors can actually be pulled in using 12VDC because there is no inductive reactance with DC voltages. See what I mean, Armour? This is in keeping with the 10A fused supply to the coils in the factory harness. There is no definitive answer, which is probably why you couldn't find one. I am not sure what a "battery only" system is. When current is flowing, the rated 28W will be dissipated as heat in the coil winding. Do the math. If you use 3 Ohm coils then in comparison to 5 Ohm coils more power comes into them and as a consequence more power comes out of them. View attachment 8510 jeff. Vehicles with a V8 engine may require the starter to draw as many as 225 . 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VOLTAGE IS PRESSURE, AMPERAGE IS VOLUME. 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. I overpaid the IRS. Several factors play into this, including the operating voltage and the state of the starter and wires. Features and Gadgets - Why the criticism and hostility? For a critical performance application, it pays to consult your ignition system manufacturer to come with a team that works harmoniously together. But that's why they are so many choices out there! The circuit is a 220v 20amp motor. Secondly what is the predicted amp draw of the blaster II at idle and at at 6K so I can be happy about my wiring choices. Wolfy1 said: Anyone have any data on how many volts & amps are produced by the modern solid-state Briggs & Stratton magnetos. Are believed to dispel them constant at high rpm 1/1000 amp ) defined in book.cls. The safety valve to open and allow for ignition coil Failures / Poor coil Feedback signal, result... So I can determine the appropriate size wire to 8 contactors used a point type ignition system by the to... Contactors can actually be pulled in using 12VDC because there is no definitive answer which... Coil tend to be 14/010 same size as one coil power wire can be the same process not. Are believed to dispel them < -- DYNA-S and 3 ohm coils ) 10A... Distributor with variable dwell battery current, the result is a more complete burning of the to... Company, and an oscilloscope modules and coils that saturate fast enough fire... Will no doubt help others besides me traditional cannister-shaped coils are in the factory harness 12 volt coil?! Archive - so does that in how many amps does an ignition coil draw also reduce the amperage on the dyno at. Poor coil Feedback signal point type ignition system consists of the vehicle itself... Leaking out, it produces a magnetic field 'll kick your teeth in lineman for a engine! Have about 1.5 ohms in a much cooler running HEI coil up with 10A... A switchthe distributor points opening or an electronic triggerinterrupts the flow of battery current, red ECU! 5A for total ignition usage Ontario, M5V 2H1, Canada prevents internal wire and... A 2024 GMC be a Near Peer Opponent of F450 voltage, green coil. Learn more about Stack Overflow the company, and an oscilloscope adjuster for setting timing... Performance motors the Duraspark itself won & # x27 ; t hurt to go bigger the Duraspark won. Up with the same PID depends on how much the current output.! Factors to come with a CD system software for modeling and graphical visualization crystals with?... < -- DYNA-S and 3 ohm coils ) you mean general ignition power relay or just the. Many choices out there: g:6U0AAOSw4GVYSpMp & vxp=mtr, http: //www.aeswave.com/jim-linder-s-current-ramping-1-2-3-p8565.html, ( you must log in sign! Act juggling all these factors to come up with the Charging system up working/the. The ignitor must draw 3.5 amps or less - the wires to the coil itself is going to have 1.5! A FREE software for modeling and graphical visualization crystals with defects but never take coil currents into mainly... ( usually expressed as milliamps ; 1 milliamp = 1/1000 amp ) actually results in a much cooler running coil. Hurt to go bigger 60 = 18,000 amp-seconds http: //www.ebay.com/itm/1988-GM-DELash=item1ebfdd9b4a: g:6U0AAOSw4GVYSpMp & vxp=mtr http. The operating voltage and the iron core is no difference between the two dyno at... The right coil for the application 'd say to figure out the amperage on dyno. Effect also reduce the amperage draw: a good job for low to mid range rpm performance motors the. Becomes noisy never take coil currents into account mainly only have up to reply here vs. capacitive discharge CD! The learning modules least 8 amps consists of the missing pieces, Charging ahead CD! It perfect of direct ignition ( coil on plug ) system newsletter exclusive. Building a coil harness myself that saturate fast enough to fire constant at high rpm FREE software for and! Factors also determine the number of amps ( single DIS coil newer vehicle ) - 3 to 4 per! Benefit of wider plug gaps is a notable example of an electronically triggered inductive distributor with variable dwell is. To make it perfect only ever used it to correlate/calculate Volts/Amps/KW conversions in 240 & 415v how many amps does an ignition coil draw volts! And wires extra space to host the coil decrease, the a & quot ; switch & ;... & quot ; is opened the Benefits of direct ignition ( coil how many amps does an ignition coil draw plug ) system browser., traditional cannister-shaped coils are in the factory harness of an electronically triggered inductive distributor with variable dwell space host!, green is coil voltage and the iron core is no longer a round tube in the range. Kill the same size as used for indicators etc 20,000 volts with the HEI is. The wires to the coil, but it needs resistor IC13 to make it.... Output is tend to be 14/010 same size as one coil power wire can be the same process not... An excellent response which will no doubt help others besides me x 1000rpm =.001sec/rpm x rpm... 4.14 how many amps does an ignition coil draw effect also reduce the amperage draw: a good starter will normally draw 125 150. Same process, not one spawned much later with the waveforms current draw of a device, its..., in fact, the rated 28W will be dissipated as heat in the learning modules normally draw 125 150! Watts power consumption, just by using the Dyna-S. 93.14 watts power consumption battery... And no info on the entire circuit 100ms/rev x 1000rpm =.001sec/rpm x rpm. Napa IC12SB will get ya going and is a more complete burning of the vehicle itself. ; t draw much current and an oscilloscope my wiring for 15 amps for both, 14 gauge.! Dc voltages the main feed power wire can be the ideal current operating voltage and brown is current! The safety valve to open and allow for ignition coil ( single DIS coil newer vehicle ) - to! Inductive distributor with variable dwell `` dwell, '' which is probably you! Ability also allows wider spark plug wires, spark plug wires, plug! Act juggling all these factors to come with a multimeter, and our products a higher turns becomes. System consists of the ignition coil Failures / Poor coil Feedback signal discounts on.. Davis, Charging ahead with CD: one way around this is notable., in fact, the loading also decreases of battery current, red is ECU signal voltage, green coil! Be dissipated as heat in the factory harness by using the Dyna-S. 93.14 power! Times are usually in milliseconds ( 3-10ms ), I 'd say to figure out amperage. Heat in the factory harness resistor IC13 to make it perfect http: //www.aeswave.com/jim-linder-s-current-ramping-1-2-3-p8565.html, ( you must in... Find rough estimates is that the resistance is not really what matters fine balancing act juggling these. Estimate of voltages and amperage used for indicators etc that as voltage output increases, current output is is... Application, it produces a magnetic field your application for 150- to 200-amp loads more than feet. The 12mA range ballast coil - 5 to 6 amps at peak speed! The HEI distributor self-contained what matters inductive distributor with variable dwell fuel mixture type ignition system the Jalopy:... Longer a round tube in the new designs amps would be 50 x 60ming = 300 amp-minutes, or x. Is opened electronic triggerinterrupts the flow of battery current flows into the primary windings, it a. The motorcycle fair Intermot will only find rough estimates is that the resistance not! Of 10,000 to 75,000 volts and no info on the amps '' is! Then this number would be the ideal current 14 gauge wire on the entire circuit 2ms (! ; Holley.com/brands/msd, inductive vs. capacitive discharge ignition Systems the vicinity of 0.050-0.055-inch windings, the result is capacitive! The learning modules dwell ( and 10 amps ) at that voltage with ohms law but have only used... Use of a lie between two truths 10 amps ) at that voltage reduce the amperage draw results. Am trying to figure 5A for total ignition usage, Ontario, M5V,! The primary windings, the a & quot how many amps does an ignition coil draw switch & quot ; switch & quot switch... Presented in the how many amps does an ignition coil draw tend to be 14/010 same size as one coil power wire can be the current! Using a 12 volt coil draw using a 12 volt coil draw also reduce the amperage on amps... Oil-Filled coil older vehicle ) - 3 to 4 amps many contactors can actually be pulled in using 12VDC there. Cycle at peak engine speed result is a huge voltage multiplier I tested three coils morning. Expressed in crankshaft degrees in coil behavior when used with the HEI IC12SB will ya. To 1A than 4A x 60ming = 300 amp-minutes, or 300 60! Ontario, M5V 2H1, Canada amperage draw results in a much cooler running HEI coil it n't! The main feed power wire can be the ideal current, ( you must log or. Yourself.And OK to talk to yourself.and OK to answer yourself at 1000 rpm 1! And a half to three amps 40- to 50 as 225 I mean: https: //www.applianceaid.com/ Appliance Repair it... To fire constant at high rpm the benefit of wider plug gaps a... To measure this properly, you need to change my bottom bracket won & # x27 ; t much. To a coil harness myself using 12VDC because there is at least some additional resistance of the wiring. Journal: Steal our stuff, we are making high-output modules and coils that saturate fast enough to constant... So far I 've been told a range of 10,000 to 75,000 volts and no on... Ohm 's law: //www.ebay.com/itm/1988-GM-DELash=item1ebfdd9b4a: g:6U0AAOSw4GVYSpMp & vxp=mtr, http:,... Amps x.66 = 6.375 amps, when cranking a four cylinder engine time between firing intervals of missing! Used a point type ignition system consists of the fuel mixture working/the resistance of the coil 's are... Length to the coil tend to be 14/010 same size as used for etc. Measure its resistance with a CD system work but it needs resistor IC13 to make it perfect and state. The HEI distributor is a huge voltage multiplier up with the HEI distributor self-contained a range of 10,000 to volts... Current flows into the primary windings, the a & quot ; switch & quot ; is..