I would like to know the firing order for a 350 small block Chevey, 1986 pick up truck. Answered in 7 minutes by: Chevy Mechanic: frank. Firing order is 1-8-4-3-6-5-7-2.The rotor turns clock wise.Odd nimber cylinders are on the drivers side and #1 on the cap from the factory is is the terminal that is the drivers side of the 2 front terminals ...The correct spark plug torque for the Chevy 350 is 18-22 ft/lbs. This is a pretty standard range for most engines, so you shouldn’t have any trouble finding the right plugs. Again, keep in mind that the actual torque may vary slightly depending on the manufacturer. However, as long as it’s in the ballpark of 18-22 ft/lbs, you should be good ...V8CHEVROLET FIRING ORDER. Veterinarian's Assistant chat. Customer: V8 (NNN) NNN-NNNNCHEVROLET FIRING ORDER. Answered by Guests in 5 mins 17 years ago. Guests. Pet Specialist. 3 satisfied customers. Specialities include: Dog Veterinary, Cat Veterinary, Bird Veterinary, Large Animal Veterinary, Small Animal Veterinary. Guests, Expert.V8 (all) Counter-. Clockwise. 18436572. Left: 1-3-5-7, Right 2-4-6-8. Note: All American V8s have offset cylinder banks to accommodate side-by-side rod pairing on the crank throws. In the absence of published information, the number one cylinder will almost always be the one that is farthest forward regardless of which bank it is on.The block casting number is stamped on the left front of the engine block, usually above the vibration damper. It consists of 3-8 numbers or letters that indicate the manufacturer, displacement, and date. Common GM block prefixes include: V codes (e.g. VIN code) for small block V8s. Y codes for small straight-6 and inline engines.Reher-Morrison offers racing cams for big blocks custom ground by Erson for a revised firing order of 1-8-7-3-6-5-4-2, a common practice in Pro Stock engines now of days, I've heard. You will note that this firing order is the same as the revised late model GM firing order, except for #3 and #2 cylinders being reversed.chevy misfiring on cyls 3,5,2,8 HELP. I have a 350 chevy with less than 20,000 miles and have had no problems till recently. It's a fairly stock 350 with stock 882 heads, comp 268 H cam, edelbrock performer eps manifold with a universal holley 600, stock points distributor. Turbo 350 trans in a 72 chevelle wagon.The Chevrolet 5.4L firing order is 1-8-4-3-6-5-7-2 and the same goes for other V8 small block engines that Chevy made back in the day. It features a standard small block V8 design and the firing order is dictated by the way in which the spark plugs are wired into the distributor connection ports. So, we also have to discuss the cylinder order ...The most complete Chevrolet Big Block vs. Small Block video. Power capability, weights, dimensions, valvetrain, displacements, model years. Plus, a bunch o...Dec 20, 2023 · How can you correct the firing order on your small block? TDC or “Top DeathCore ” in firing condition for the number one piston is required if you have disassembled the distributor off the motor and need to replace it so that the distribution hammer on the blade is in location at 6:30. The firing order of a Chevy 350 small-block engine is 1-8-4-3-6-5-7-2. In this order, you can tell that cylinder #1 fires off first. After the first one is done, cylinder #8 takes over, then cylinder #4, and so on until cylinder #2 finishes off the ignition pattern.The main reason I'm bench-building this motor is because I want something different in a sea of 350 and 383 small blocks. ... in the small-block Chevy with its firing order 1-8-4-3-6-5-7-2 ...[ February 23, 2024 ] Reviving a 1959 Dodge D-300 Family Farm Truck Builds and Examples [ February 19, 2024 ] Elevate Your Wiring Projects with This Clever Hack! DIY Projects [ February 16, 2024 ] Bolt-In 9-Inch Rear End Swap for 1988-98 Chevy Trucks Builds and Examples [ February 15, 2024 ] Making A Checkered Flag Shift Knob …Firing Order Chevy 350 Distributor Wiring DiagramFiring Order Chevy 350 Distributor Wiring HarnessFiring Order Chevy 350 Distributor Service ManualFiring Ord...The 350 HO engine incorporates modern technology in a package that can be installed in applications where 265-400ci small block Chevrolet V-8's were originally used. ... However, as noted in the following sections, there may be minor differences between a 350 HO engine and an older small block V-8 engine. ... Firing Order: 1-8-4-3-6-5-7 ...Chevrolet 5.0L V8 firing order. To cut straight to the point – the Chevrolet 5.0L V8 firing order is 1-8-4-3-6-5-7-2 and it’s the same firing order used in the 350 cu in engine. in fact, these two share quite a lot in common, including the engine block and cylinder head design, as well as the majority of the inner engine components.I would like to know the firing order for a 350 small block Chevey, 1986 pick up truck. Answered in 7 minutes by: Chevy Mechanic: frank. Firing order is 1-8-4-3-6-5-7-2.The rotor turns clock wise.Odd nimber cylinders are on the drivers side and #1 on the cap from the factory is is the terminal that is the drivers side of the 2 front terminals ...To cut straight to the point – the Chevrolet 5.0L V8 firing order is 1-8-4-3-6-5-7-2 and it’s the same firing order used in the 350 cu in engine. in fact, these two share quite a lot in common, including the engine block and cylinder head design, as well as the majority of the inner engine components. However, the 305 was fairly less ...Revised firing order. The Gen III did away with the familiar 1-8-4-3-6-5-7-2 firing order of previous small-block engines. The new firing order (1-8-7-2-6-5-4-3) reduced crank arm stresses, quelled vibration, …Apr 6, 2024 · The Chevy 350, SBC, and BBC engines all use the same firing order. This firing order is -1 (first spark), 0 (second spark), +2 (third spark), +1 (fourth spark), -2 (fifth spark), -1 (sixth spark). The firing order of the distributor cap is the same, except that it’s set up so that it fires in the opposite direction. The following is a diagram of the SBC (Small Block Chevy) distributor firing order: The distributor cap is numbered clockwise, with position one being at the fifth hour. A normal SBC V8 engine fires in the following order: 1-8-4-3-6-5-7-2. This firing order dictates the routing of the spark plug wires, starting with the first spark plug wire ...The firing order for a small block Chevy engine is 1-8-4-3-6-5-7-2, whereas the order for a large block Chevy engine is 1-8-4-3-6-5-7-2. The most obvious distinction between the small block Chevy firing order and the large block Chevy firing order is, of course, the size disparity between the two engines.. The dimensions of a small block …Mar 1, 2014 ... Found the correct firing sequence of a Chevy 350 V8 on the internet and it helped me get my plug wires where they should be.The firing order applies to. The 1-8-4-3-6-5-7-2 firing order applies to all small block engines, such as: 262 Chevy; 267 Chevy; 265 Chevy; 283 Chevy; 302 Chevy; 305 Chevy; 307 Chevy; 327 Chevy; 350 Chevy (5.7 vortec) 400 Chevy; Check Ford 390 Firing Order. Torque SpecificationsSpark plug ignition for the Chevy 350 Small Block V8 engine utilizes a clockwise rotation and an order of 1-8-4-3-6-5-7-2. For the 5.3L V8, you should use a similar setup with the firing order being 1 – 8 – 7 – 2 – 6 – 5 – 4 – 3 in a clockwise direction. As for the Chevy 5.7 engine, it follows suit with its own combination of ...The firing order, which should be cast into the intake manifold, for the chevy small block V8 is 1-8-4-3-6-5-7-2. The firing order is the numerical sequence in which the spark plugs are fired. The insertion position of each spark plug wire around the circumference of the distributor cap can be found according to a clock face.Reher-Morrison offers racing cams for big blocks custom ground by Erson for a revised firing order of 1-8-7-3-6-5-4-2, a common practice in Pro Stock engines now of days, I've heard. You will note that this firing order is the same as the revised late model GM firing order, except for #3 and #2 cylinders being reversed.I made this video of the correct firing order of my Small Block Chevy before I messed with the wires... Hope this helps someone who might be stuck on the cor...The firing order is 1-8-4-3-6-5-7-2. The distributor rotates in a clockwise direction. The engine must be on the compression stroke on the #1 cylinder. Line up the timing marks. Remove the cap and the rotor should be pointing to …The Chevy 350 engine is a 350 cubic inch (5.7-liter) small block V8 with a 4.00 and 3.48 inch bore and stroke. Depending on the year, make and model of a car, horsepower ranges from approximately 145 to more than 370. Rated at up to 380 pound-feet of torque, this engine is great for towing; however, fuel economy is low and -- depending on the ...With its 1950s styling, the 1957 Chevy is a timeless car. This article will show you how to draw this cool classic car in just five simple steps. Advertisement The 1957 Chevy is on...Firing Order. The routing of the spark plug wires from the distributor cap on the engine to the individual spark plugs in each cylinder determines the sequence in which the spark plugs fire. Each of the eight cylinders on the 350 engine requires a spark at the correct time. The firing order on the 350 small block engine is 1-8-4-3-6-5-7-2. Small Block Chevy V8. 267, 305, 327, 350, 400 cid. Generation I (1955-1980) Firing Order Flat plane 180 Crank Barn Find SB Chevy from 1959. Watch on. Technology has come a long way in the last few years, but this engine shows that ingenuity is not a new thing when it comes to making power. The folks at Johnson’s Machine in Olympia, Washington posted this video on YouTube featuring a small-block they purchased on Ebay about 20 ...Mar 1, 2014 ... Found the correct firing sequence of a Chevy 350 V8 on the internet and it helped me get my plug wires where they should be.A 350 Vortec engine fires in the following order: 1-8-4-3-6-5-7-2. This firing order denotes the order in which the combustion process’s cylinders ignite. The firing order goes from cylinder 1 to cylinders 8, 4, 3, 6, 5, 7, and then cylinder 2 before ending with cylinder 1. For good engine performance, it’s crucial to adhere to this firing ...Small block Chevys, such as the 302, 305, and 307, have a similar firing order but are more compact and fuel-efficient. Big block Chevys, like the 366, 396, and 502, provide more power but consume more fuel. The firing sequence can be modified for increased ride comfort. The 4/7 cam swap changes the firing order to 1-8-7-3-6-5-4-2, …Chevrolet's small-block V-8 engine timing specifications depend on the cubic-inch displacement and whether a manual or automatic transmission matches the engine. Small-blocks have ...Oct 28, 2019 ... Many Chevy firing orders My IG: 13b_dorito Here is some useful links for tools that you need to get this job done and that you will need on ...Apr 25, 2023 · The firing order for Chevy 350 has been stated above to be 1-8-7-2-6-5-4-3; this means that the fuel goes in, sparks, and is ignited first in cylinder 1, then cylinder 8, and so on and so forth, The 350 is typically a V8 engine, meaning it has four cylinders per bank, making it a host of eight. This means it will be harder for an ignition system to fire the plugs in the test rig than in an engine. As a result, an ignition system starts drop- ping sparks in the test rig at about 15- to 20-percent sooner than it does in a running engine. The results you see here have been corrected for this.June 5, 2023. The chevy small block firing order is 1-8-4-3-6-5-7-2. This firing order is a sequence in which the engine’s spark plug wires are connected to the distributor cap, …SBC Chevy V8 engine from our Hot Rod Plow Truck gets hydraulic lifter valves set and we prime the V8 oil pump system with a screw driver + socket. We also sh...Sep 15, 2022 ... Change Your SBC Engine's Firing Order for Better Performance with a Summit Racing Pro 4-7 Swap Cam · Comments19.Chevy 350 firing order is the same across all its small-block V8 engines, which means that the SBC firing order is 1-8-4-3-6-5-7-2. The small-block motor includes the 262, 265, 267, 283, 302, 327, 350, and 400. The SBC firing order means that cylinder number 1 fires first, followed by cylinder number 8, cylinder number 4, and so on. The firing order works for the following Small Block Chevy Engines - 283 Chevy 302 Chevy 305 Chevy 307 Chevy 327 Chevy 350 Chevy (yes the 5.7L) 400 Chevy The firing order works for the following Big Block Chevy Engines - 366 Chevy 396 Chevy 402 Chevy (Sometimes referred to as a 396) 427 Chevy 454 Chevy 502 Chevy The firing order of all small-block Chevy engines, including the 350, is 1-8-4-3-6-5-7-2. The rotor under the distributor turns in a clockwise direction. Chevy small-block engines ...Apr 27, 2024 · All stock LS Engines have the 1-8-7-2-6-5-4-3 firing order. It’s an upgrade on the 1-8-4-3-6-5-7-2 firing order of the traditional Chevy Small/Big Block Engines. 4/7 Swap Firing Order. Changing your engine’s firing order from the traditional version to the improved LS order is possible. The procedure is called “The 4/7 Swap.” You should ... First off, let’s cut the wait – the Chevrolet 5.7L 350 cu in firing order is 1-8-4-3-6-5-7-2 and this firing order has stuck with most of Chevy’s small block V8s of that time. However, there are a few particularly interesting facts about this engine. Most notably, Chevy’s small block V8 cylinder arrangement is pretty different than ...AUBURN HILLS, Mich., March 27, 2023 /PRNewswire/ --2023 Dodge Challenger SRT Demon 170, the fastest, quickest, most powerful factory muscle car in... AUBURN HILLS, Mich., March 27,...The first block could be used on the street, with a max bore size of 4.350 inches. Even with a mild 4.250-inch stroke, that's 505 ci. ... As to your question about the different-firing-order small ...The Parental Controls feature on the Kindle Fire blocks access to certain functions of the device unless the correct passcode is entered. As the name implies, this feature is desig...The LS engines’ firing order is 1-8-7-2-6-5-4-3. This was orchestrated to upgrade the traditional Chevrolet small block/big block engines’ 1-8-4-3-6-5-7-2 old firing order. However, upgrading your Chevy’s old engine’s firing order is possible if you can access an expert auto technician who’s trained for such operations.Small Block Chevy V8. 267, 305, 327, 350, 400 cid. Generation I (1955-1980) Firing OrderJul 6, 2021 · Listed above we have a diagram of the distributor rotation, cylinder order, and firing order. Listed below are some of the most important torque specifications and torque sequences that are helpful to anyone building a small block Chevy. Small Block Chevrolet Torque Specifications. The Chevy LS firing order is 1-8-7-2-6-5-4-3. This is for a standard firing order camshaft and a standard cross-plane crankshaft in which the throws are spaced 90 degrees apart. It is an upgrade on the firing order of Chevy vehicles’ traditional Small/Big Block engines. The firing order 1-8-7-2-6-5-4-3 does a decent job of firing alternately ...The firing order, which should be cast into the intake manifold, for the chevy small block V8 is 1-8-4-3-6-5-7-2. The firing order is the numerical sequence in which the spark plugs are fired. The insertion position of each spark plug wire around the circumference of the distributor cap can be found according to a clock face.Correct. Doesn't matter if it's HEI or reg (i converted my Cutlass there to HEI from points) firing order will remain the same. Ask Your Own Chevy Question. I know the firing order doesnt change it is 18436572. I need to know exactly the terminal on the cap for #1 wire. I have conflicting diagrams.A detached concrete block garage built with the insulated concrete block forms is wind and fire resistant. Expert Advice On Improving Your Home Videos Latest View All Guides Latest...Part TwoSetting the initial timing on a Chevy small block. I have set the timing on over a hundred small blocks, and rebuilt many a classic chevy, for a time...The Chevrolet small-block engine is a series of gasoline -powered V8 automobile engines, produced by the Chevrolet division of General Motors between 1954 and 2003, using the same basic engine block. Referred to as a "small-block" for its size relative to the physically much larger Chevrolet big-block engines, the small-block family spanned ...Aug 8, 2011 · TPIS baselined the small block Chevy engine in its LT1 configuration: a GM factory TPI computer, a new MSD Opti-Spark distributor, and a 6AL box to light the fire. The rest of the engine was built ... Most Chevy small block and big block V-8 engines use the firing order 1-8-4-3-6-5-7-2. The LS family of V-8 engines has a 1-8-7-2-6-5-4-3 firing order, according to Reference.com. ...Oct 20, 2022 · The correct spark plug torque for the Chevy 350 is 18-22 ft/lbs. This is a pretty standard range for most engines, so you shouldn’t have any trouble finding the right plugs. Again, keep in mind that the actual torque may vary slightly depending on the manufacturer. However, as long as it’s in the ballpark of 18-22 ft/lbs, you should be good ... May 25, 2022 ... The SBC 4/7 Swap — 1-8-7-3-6-5-4-2 · Comments12.Nov 16, 2023 · Chevy 350 Small Block (SBC) Firing Order. The Chevy 350 Small Block is one of the most popular and widely used V8 engines in automotive history. Its firing order is a well-known and critical piece of information for anyone working with this engine. The firing order for the SBC Chevy 350 is 1-8-4-3-6-5-7-2. Duramax 6.6 Firing Order – With Diagrams! When it comes to diesel engines, the Duramax 6.6 is a popular choice for truck enthusiasts. One important aspect of this engine is its firing order, which refers to the sequence in which the cylinders fire. Getting the firing order right is critical for the engine to function properly and efficiently.June 5, 2023. The chevy small block firing order is 1-8-4-3-6-5-7-2. This firing order is a sequence in which the engine’s spark plug wires are connected to the distributor cap, and it is critical to getting the engine to run smoothly and efficiently. The chevy small block is a classic engine that has been used in countless vehicles and ...Chevy 350 firing order is the same across all its small-block V8 engines, which means that the SBC firing order is 1-8-4-3-6-5-7-2. The small-block motor includes the 262, 265, 267, 283, 302, 327, 350, and 400. The SBC firing order means that cylinder number 1 fires first, followed by cylinder number 8, cylinder … See moreThe Chevy 350 is a Chevy small-block engine used in almost any vehicle model and size. Whether you own a sedan, a sports car, a truck, or any other type of vehicle, you can still buy and fix this engine in your vehicle to take you through any journey. ... LS Firing Order & Cylinder Numbers. 1999-2022 Chevy 5.3 Oil Capacity Free Lookup. GM/Chevy ...The Chevy 350 has a firing order of 1-8-4-3-6-5-7-2. The majority of Chevy old-school motors contain this firing order. This firing order reflects the firing sequence of the spark plugs and wires if the engine …304. 31K views 3 years ago. Small block Chevy firing order explained how the old timers taught me. You should always be able to remember or figure out timing on …The firing order, which should be cast into the intake manifold, for the chevy small block V8 is 1-8-4-3-6-5-7-2. The firing order is the numerical sequence in which the spark plugs are fired. The insertion position of each spark plug wire around the circumference of the distributor cap can be found according to a clock face.Dec 21, 2008 · I would like to know the firing order for a 350 small block Chevey, 1986 pick up truck. Answered in 7 minutes by: Chevy Mechanic: frank. Firing order is 1-8-4-3-6-5-7-2.The rotor turns clock wise.Odd nimber cylinders are on the drivers side and #1 on the cap from the factory is is the terminal that is the drivers side of the 2 front terminals ... Chevrolet's small-block V-8 engine timing specifications depend on the cubic-inch displacement and whether a manual or automatic transmission matches the engine. Small-blocks have ...Chevrolet's small-block V-8 engine timing specifications depend on the cubic-inch displacement and whether a manual or automatic transmission matches the engine. Small-blocks have ...Here's a clip from our How To adjust Valves on your Small Block Chevy DVD. This short clip describes the firing order on a Small or Big Block Chevy engine. F...Dec 17, 2023 · The firing order of a Chevy 350 engine is a fundamental aspect that harmonizes the combustion process for both Small Block Chevy (SBC) and Big Block Chevy (BBC) V8 engines. This sequence is not only crucial for the efficient operation of the engine but also serves as a mnemonic for Chevrolet aficionados and mechanics alike, aiding in quick ... (Image/OnAllCylinders) Our small-block Chevy firing order is 1-8-4-3-6-5-7-2, so that’s the order in which we will install the plug wires. We started with Number One and worked our way around the distributor cap clockwise using a set of Summit spark plug wires.The best way to do this so you don’t get confused is to just follow the firing order …
Setting the ignition timing on a 350 engine means you synchronize the rotation of the distributor with the rotation of the crankshaft. This ensures that the spark plug at each cyli.... Kenmore elite washer won't spin
By comparison, this is identical to the firing order for the original small-block Ford (260-289-302) as well as the FE and 385 series of engines when the two platforms are overlapped. ... Here’s a set of Tri-Y headers for a big-block Chevy that sports the traditional 1-8-4-3-6-5-7-2 firing order. Note that the #5 and #7 exhaust header …When GM introduced the LS engine in 1997, it featured many design changes from the Gen 1 Small Block Chevy (SBC) engine that improved engine durability and efficiency. One of those changes was the evolution of the cylinder firing order from the well-known 1-8-4-3-6-5-7-2 to 1-8-7-2-6-5-4-3. In a four-stroke engine, the crankshaft spins twice ...The Chevy 350 firing order is 1-8-4-3-6-5-7-2. This basically means that besides the number 1 spark plug wire is the number 8 spark plug wire. Next to it is the number 4 spark plug wire and so on. This is read in a …So what is the correct firing order for a Chevy 350? In every case, it is 1-8-4-3-6-5-7-2. Most old-school Chevies have this firing order. Table of Contents. 1. Chevy …Alternatively, you can make any cap terminal the No. 1 terminal, so long as the cap terminals are still in proper firing-order sequence (for a Chevy, 1-8-4-3-6-5-7-2, clockwise rotation). See All ...The firing order of the small block chevy engine is 1,8,4,3,6,5,7,2. Check out the Chevy 350 Firing Order Diagram below to understand how it works: ... The Chevrolet small block 350 engine is a 6.0 liter, overhead valve V-8 engine that is built for the small Chevy truck models. The 350 engine was made from 1970 until 1990.Firing Order: 1, 8, 4, 3, 6, 5, 7, 2 Illustrated here is the correct position for the spark plug wires on the distributor cap, as well as the correct firing sequence. This Tech Tip is From the Full Book “ SMALL-BLOCK CHEVROLET: STOCK AND HIGH-PERFORMANCE REBUILDS “. SBC Chevy V8 engine from our Hot Rod Plow Truck gets hydraulic lifter valves set and we prime the V8 oil pump system with a screw driver + socket. We also sh... Facebook is firing up its lawyers to try to block EU regulators from forcing it to suspend transatlantic data transfers in the wake of a landmark ruling by Europe’s top court this ...The 350 has a place with the small block motor family. They are classified as small blocks or SBC because they are more modest than big block container engines. Also, the accurate sequence of 350 firing orders is like this 1-8-4-3-6-5-7-2.. This is properly linked and shows that cylinder 1 turns on first, then cylinder 8, then 4, etc until …Dec 26, 2023 · A 350 Vortec engine fires in the following order: 1-8-4-3-6-5-7-2. This firing order denotes the order in which the combustion process’s cylinders ignite. The firing order goes from cylinder 1 to cylinders 8, 4, 3, 6, 5, 7, and then cylinder 2 before ending with cylinder 1. For good engine performance, it’s crucial to adhere to this firing ... Jul 6, 2021 · Listed above we have a diagram of the distributor rotation, cylinder order, and firing order. Listed below are some of the most important torque specifications and torque sequences that are helpful to anyone building a small block Chevy. Small Block Chevrolet Torque Specifications. Firing Order: 1-8-4-3-6-5-7-2. Explanation of small block chevy. Since all of its small-block V8 engines have the same firing order, we may deduce that the order for the Small block Chevy is 1-8-4-3-6-5-7-2.Common Firing Orders for Chevrolet 350 Smallblock Engine. The Chevrolet 350 Smallblock engine, revered for its versatility and performance, offers a range of common firing orders that cater to diverse driving preferences and performance objectives. Each firing order is meticulously designed to optimize the engine's balance, …The following is a diagram of the SBC (Small Block Chevy) distributor firing order: The distributor cap is numbered clockwise, with position one being at the fifth hour. A normal SBC V8 engine fires in the following order: 1-8-4-3-6-5-7-2. This firing order dictates the routing of the spark plug wires, starting with the first spark plug wire ...Firing Order: 1-8-4-3-6-5-7-2. Explanation of SBC firing order diagram. The diagram above shows how Chevy 350 has already a selected sequence of engines getting sparks.Chevy 350 firing order is the same across all its small-block V8 engines, which means that the SBC firing order is 1-8-4-3-6-5-7-2. The small-block motor includes the 262, 265, 267, 283, 302, 327, 350, and 400. The SBC firing order means that cylinder number 1 fires first, followed by cylinder number 8, cylinder … See moreAll stock LS Engines have the 1-8-7-2-6-5-4-3 firing order. It’s an upgrade on the 1-8-4-3-6-5-7-2 firing order of the traditional Chevy Small/Big Block Engines. 4/7 Swap Firing Order. Changing your engine’s firing order from the traditional version to the improved LS order is possible. The procedure is called “The 4/7 Swap.” You should ...A four-seven firing order swap is becoming an increasingly popular upgrade for engine builders looking to squeeze more performance from a Small Block Chevy engine. Never heard of it? Basically, instead of the traditional 1-8-4-3-6-5-7-2 firing order, the four-seven swap makes it 1-8-7-3-6-5-4-2..