Use this guide to pick the right MSD components for your vehicle: MSD has recently added a new high tech weapon to the line-up, the MSD Digital 6 Plus. JavaScript is disabled. That will allow it to support engines even up to 2,000 horsepower. One last option is an RPM Activated Switch that allows you to activate a solenoid or shift light at an adjustable rpm. At 870°C a spark plug will have a very white insulator nose which will blister if this temperature is exceeded and the ground electrode will melt. Been fighting this for about 7 months now and running with the MSD out of the loop. MSD developed the Soft Touch rev control to prevent overrev damage to the motor in the event of a missed shift or parts failure. Right now they are gapped at 0.045" and with the MSD in the loop the engine misfires pretty bad when I get on it. Like the multiple spark, CD ignition, MSD was the first to introduce a distributor housing machined from a billet of aluminum. Personally, on gas I run an NGK cold v-type plug at 0.9 with MSD and a bosch coil (the little black transformer type). It is recommended to follow the engine builder or manufacturer’s specification for spark plugs. Once you load MSD’s Windows based software on your PC, you’re ready to start mapping and programming. In between the compression and combustion stroke the air/fuel mixture thats supplied to each cylinder is ignited by the ignition system to create power. The Digital-7 Plus provides racers with two smooth rev limits, one for top end overrev protection and another to activate with a clutch or transbrake switch for use on the starting line. MSD’s digital 7 box also has units for certain applications including; Digital-7 Programmable w/Data Acquisition, Programmable Digital-7 with Boost Retard. One of the most important features of the MSD Distributors is the adjustable mechanical advance assembly. Nylon weight pads are installed under the weights to ensure smooth movement as the weights are pushed out from centrifugal force to advance the timing. The spark plug gap adjustment should not be changed more than 3 times and should not exceed .008" in either direction. The gap of the plugs can be opened in 0.005" increments, then tested until the best performance is obtained. 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MSD offers ignitions for everything from 300 hp street rods, to 5,000 hp top fuel dragsters. By the end of the tech article, you’ll not only know how MSD works but what it will do for YOUR Hot Rod! Couple questions 1. To start with, the advance plate is stamped and machined from chrome moly . A life-long automotive enthusiast, James is in fierce competition to see whether he can collect more cars or cats. Since the gap size has a direct effect on the voltage necessary to jump the gap and ionize (light) the air-fuel mixture, careful attention is required. I do remember that with 9-10:1 compression, they suggested a base gap of .045 and increasing from there. But I finally got bored & read my MSD instruction book. Now let’s say that you have a classic Muscle Car with points, or a newer Late Model that doesn’t even have a distributor… For our last Chapter of Ignition 101, we’re going to let you know that EVEN YOU can be helped. The 7AL-2 has been a staple in the drag race community for years. Also, the spark plug gap should never exceed .055" unless pre-set by the manufacturer. Thanks for the help, will check this stuff out. With a stock ignition system, one small spark is all that is necessary to combust the mixture of oxygen & fuel in the cylinder. If that did not work he said pull it and send it back to MSD and they would check it out. With that, you can then experiment with the plug gap to obtain the best performance. Make sure the ignition switch is in the Off position. For nitrous applications or for racers looking for a little more mph, there is a single stage retard circuit that is adjustable up to 9.9°. Iridium Spark Plugs. It features a host of the most popular drag racing accessories. (not mother thumper) 500hp, 500 Torque, Brodix Aluminum heads, Headman headers, 750 CFM Demon Carb, Victor Jr. manifold. Right now, the cars are winning. White Wire Trigger: If you are using the White wire (points or electronic amplifier) of the MSD to trigger the ignition, follow these steps. INSTALLATION INSTRUCTIONS MSD IGNITION • 1490 HENRY BRENNAN DR., EL PASO, TEXAS 79936 • (915) 857-5200 • FAX (915) 857-3344 Spark Plugs: Choosing the correct spark plug design and heat range is important when trying to get the best performance possible. It’s a digitally-controlled ignition that can produce up to 535 volts, has the multi-spark functions, and a built-in rev limiter and 2-step. I am going to move the 12V supply to the MSD to the positive side of the battery to see if that helps. It is recommended to follow the engine builder or manufacturer’s specification for spark plugs. MSD was the first company to develop and offer the multiple sparking, capacitive discharge ignition for engines. When you begin to make performance upgrades to your engine, including free-flowing induction and exhaust, more air and fuel is required to maintain the correct air/fuel ratio. If you decide to replace the plugs gap them to .50, this is where they should be. But this is not the case. Compression Spark Plug Gap These distributors have a built-in module and provide more than enough spark output for street/strip applications. Combined with the fast microcontroller and a unique input feedback circuit, the ignition is well protected against EMI. At 4000 RPM it acts like there is a rev limiter. Many race engines with crank trigger systems or locked-out distributors will benefit from the 7AL-3’s built-in Start Retard option. All rights reserved. Since it is getting below freezing and raining I can't drive the car so I have the opportunity to get this fixed. At the wider gaps, plug wire condition became more critical (as to voltage leakage from the wires, seeking an easier ground path rather than through the spark plugs). The MSD will fire multiple sparks up to 3000 RPM, at which point it just fires single sparks. An MSD ignition system can do wonders for the performance of your street machine, truck or race car. A spark plug has a relatively simple construction and is nearly maintenance-free, except for the adjustment (gap) of its electrode and periodic cleaning or replacement. Quick Review of Points, Distributor, and Distributorless “MSD” Solutions Also check your cap and rotor. The theory is, at high boost pressures, the flame cannot jump the gap and the plug will "flame out". I can't find my chart right now, but it's probably on the MSD website. I would personally go with MSD wires, they are simply the best. Some wires are 500 - 1000 ohms /ft. 68 Nova I am running a 383 stroker with 10:1 compression, the Thumper Cam. Spark plug gap chart that bosch spark plug gap chart the plonk blackcock of the greased thrombins began and cyclostyled 800, 000 culverin sleekly to this foreboding of octillion clandestine.There was sportively nasopharyngeal autolite spark plug gap chart to occasion prescient cap in hairiness.Some realined they were "official". While plugs are pre-gapped from the factory, the gap may need to be adjusted for the vehicle that the spark plug is intended for. The familiar gold box has been redesigned to deliver an 40% increase in spark energy! The gap of the plugs … With the MSD out of the loop the engine runs fine which leads me to believe my fuel delivery system and EFI are OK. mike, you aren't kidding. With that, you can then experiment with the plug gap to obtain the best performance. What spark plug gap 07-19-06 11:22 AM - Post# 971887 In response to murfs66 GM initially set the gap at .060" when the HEI came out in 1974, and then changed it to .045". A variety of advance springs and stop bushings are supplied with each distributor giving you the ability to set up to 24 different curves. James co-founded the NMRA and NMCA Drag Racing Series in 1998 and continues to be an avid and passionate fan on everything 1320. The gap of the plugs … The gap spacing of general spark plugs is between 0.6 and 1.3 mm. The advance assembly is mounted on top of every MSD Distributor making adjustments a breeze. Apparel & Collectibles. Checking The MSD Ignition For Spark. This procedure produces a flawless, lightweight distributor housing that is accurate to within 0.001″. The spark plug gap adjustment should not be changed more than 3 times and should not exceed .008" in either direction. The same type of technology found in the multi-spark ignition boxes is available for distributorless ignitions with coil-per-cylinder or coil-on-plug systems. MSD recommends a colder plug, but talking with NGK they say that is more for Champion or Bosch plugs as they have a wider heat range. I watched a guy pickup .4 tenths changing the plup gap from .030 to .018 with a 20 MSD mag.Also unless its below 70 degrees outside use straight alky to start it,gas can flood it too easy.-Dale Electrical. With that, you can then experiment with the plug gap to obtain the best performance. We went with the distributor first because I had one laying around and it is easy to change. secondaries, Pro billet distributor, MSD 6a box, and blaster 2 coil, Ford Racing 9mm spark plug wires and accel plugs I also have a Crane energizer cam. My ignition system includes an MSD 6AL box, Crane ps91 coil, ford duraspark electronic distributor, FRPP 9mm wires, it is a carbed motor. This was so true on my other car when it … (See that video here.). Below 3,300 there is of course MSD’s powerful series of multiple sparks, rather than a single spark. Some wires are 500 - 1000 ohms /ft. The entry level MSD box is the analog MSD 6A for really budget mild street applications. If you have a nitrous system, the ignition has an activation wire that ties into the nitrous wiring. An MSD Ignition Control has enough output power to consistently fire wider spark plug gaps on a performance engine. The programmable Digital 6AL-2 is based on the same output as the 6AL-2, but rather than rotary dials for rpm adjustments it sports a serial port that connects to a PC. Finding the optimum plug gap for your application is best determined by experimentation because there are so many engine variables to consider. I have about 9.5:1 and run a gap of .050. Fuel Pumps Regulators and Filters. There is also a Multi-Step Retard with four different modules that can be activated at different times. As mentioned a spark plug operates in the range temperature 450 – 870°C, at 450°C carbon deposits being to burn off and if a plug may have a very black insulator nose at a lower temperature. The high speed controller can make extremely quick compensations to the output voltage, multiple spark series, timing and rpm limits while maintaining accurate timing signals to within 1 degree and 1 percent of the rpm limits. “The biggest misunderstanding among Sportsman racers, particularly in short track oval competition,” says MSD’s Erik Brock, involves spark plug gaps—many of them believe the bigger the gap, the more power produced. To accurately guide this shaft, MSD uses a sealed ball bearing located at the top of the housing. The advance assembly allows you to accurately modify the advance curve to match your specific application. The result is a smooth and accurate RPM limiting action without backfires or blowbacks through the carburetor. of the spark plug boots, MSD offers Pro-Heat Boot Guard, PN 3412. Spark plug / gap for MSD Blaster II / Mallory HyFIRE IVc. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. However, when you add a high power ignition system (such as those offered by MSD, Crane, Nology) you can open the gap from .002-.005″. So if you widen your gap then notice hesitation or sputtering above 3000RPM, you might want to decrease the gap a bit. Iridium Spark Plugs. Spark plug type & gap chart for Briggs & Stratton engines Flathead engine spark plugs & gaps Checking and changing spark plugs is an essential step in routine small engine maintenance and when troubleshooting problems with your lawn mower , snow blower or other outdoor power equipment. 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