Firing order for a small block chevy

The 5.7 Chevy firing order is 1-8-4-3-6-5-7-2, which means that the cylinders fire in the following order: Cylinder 1 fires first, followed by cylinder 8. Cylinder 4 fires …

Firing order for a small block chevy. Most engine codes start with the letter L; for example, L31. The firing order for a Chevy 350 small block is 1-8-4-3-6-5-7-2. This sequence indicates that cylinder #1 will ignite first. Cylinder #8 takes over when the first one is finished, and so on until cylinder #2 finishes the ignition pattern.

Firing order of our SBC/BBC BluePrint Engine line. Knowledge Base Go to www.blueprintengines.com ... All of our small block and big block Chevy engines have the following firing order: www.blueprintengines.com Help Center. Go to www.blueprintengines.com ...

In short, The firing order on a 5.3 LS engine is 1-8-7-2-6-5-4-3. This means, the spark plug at number one cylinder (1) fires first, then number eight (8), and so on. The distributor rotates in a clockwise direction, which means that when viewed from above, it rotates counterclockwise. The number one spark plug fires first, followed by the ...GM 5.7L firing order. Talking about the small-block V8 version, the GM 5.7L firing order is 1-8-7-2-6-5-4-3, just like for the previous and successor engines of the same type. This makes things more convenient for DIY mechanics since you won’t have to bother about using the wrong firing order of another small block V8.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, and improved main bearing performance. Cathedral-port cylinder headder to the firing position at which time the following valves may be adjusted: Exhaust 2-5-6-7 Intake 3-4-6-8 The following procedure performed with the engine running should be done only in case readjustment is required: 1. After engine has been warmed up to operating temperatures, remove valve cover

The normal small-block Chevy has a firing order of 1-8-4-3-6-5-7-2. By swapping 4 and 7 to create a new firing order of 1-8-7-3-6-5-4-2, some builders claim to gain an additional 5 to 10 hp. To achieve a special firing order, a specially designed camshaft is required. Thanks to the use of computer design and CNC machining capabilities, cam ...Spark 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 ... Firing Order Chevy Small & Big Block 1-800-345-4545 jegs.com Chevy Small & Big Block (Non-LS Engine) 2 1 FRONT 1 - 8 - 4 - 3 - 6 - 5 - 7 - 2 4 3 8 7 Firing Order Chevy Small & Big Block 1-800-345-4545 jegs.com Chevy Small & Big Block (Non-LS Engine) 2 1 FRONT 1 - 8 - 4 - 3 - 6 - 5 - 7 - 2 4 3 8 7 6 5. Title: Instruction Sheet 60800-60802 Rear Leaf Spr Author: Jeg's …follow the diagram when changing your spark plug wires over. It is always good to replace each new wire one for one with the old wire, rather than to take th...Firing order of our SBC/BBC BluePrint Engine line. Knowledge Base Go to www.blueprintengines.com ... All of our small block and big block Chevy engines have the following firing order: www.blueprintengines.com Help Center. Go to www.blueprintengines.com ...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 4.3 Vortec firing order is 1-6-5-4-3-2 and this has a clockwise rotation. Being a V6 engine it has 6 cylinders thus a firing order of a number of sequences 6. First Cylinder Number 1 is on the driver’s side, ahead of Cylinder Number 2. Next up are numbers 3 and 5. Passenger side is #2, #4, #6.You will find dozens of materials on adjusting valves on a small block Chevy. We are going to share something more straightforward. We will try to make it as simple as possible. Firing order 1-8-4-3-6-5-7-2; The distributor rotates clockwise by 90 degrees; The valves need to go EIIEEIIE; Using the Exhaust Opening/Intake closing method; Remove ...Reduced crankshaft torsional vibration was the main reason GM adopted the LS engine’s 1-8-7-2-6-5-4-3 firing order (4-7/2-3 swap for SBC). According to GM engineers, computer modeling showed that the …Jan 6, 2023 ... 350 SBC Chevy $1600 budget build How much HP will it make on the dyno?? ... Replace Your SBC ... How to install 350 small block spark plug wires...Chevy 350 small block firing order along with cylinder locations.Distributor Rotation: Clockwisewww.backyardmechanic.org By using this information user assum...

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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 ...All odd-numbered cylinders 1, 3, 5, and 7 are on the driver’s side. While even-numbered 2, 4, 6, and 8 are on the passenger side from front to back of the engine. Chevy 5.3 has firing order 1-8-7-2-6-5-4-3 starting from cylinder #1. It is different from the older small block and big block Chevy parts.der to the firing position at which time the following valves may be adjusted: Exhaust 2-5-6-7 Intake 3-4-6-8 The following procedure performed with the engine running should be done only in case readjustment is required: 1. After engine has been warmed up to operating temperatures, remove valve cover287-92R SBC Solid Roller Camshaft. RPM Range: 3200-7100. T297R SBC Solid Roller. Your Price: Call for Pricing & Availability. T297R SBC Solid Roller Camshaft. RPM Range: 3500-7500. 290-0R SBC Solid Roller. Your Price: Call for Pricing & Availability. 290-0R SBC Solid Roller Camshaft.

Pwrtrip75. 2114 posts · Joined 2006. #8 · Dec 17, 2006. The LS1 has a firing order of 1-8-7-2-6-5-4-3. They do sound different than a SBC. Besides the overall design of the heads, that was also a change on these engines from the old SBC. Obviously it works because an LS1 engine in its stock form is pretty potent.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. The normal small-block Chevy has a firing order of 1-8-4-3-6-5-7-2. By swapping 4 and 7 to create a new firing order of 1-8-7-3-6-5-4-2, some builders claim to gain an additional 5 to 10 hp. To achieve a special firing order, a specially designed camshaft is required. 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.(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 …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 firing order of a 454 Chevy Big Block is a precise sequence that dictates when each cylinder receives a spark to ignite the air-fuel mixture. Using the cylinder numbering of the engine, the firing pattern is 1-8-4-3-6-5-7-2. It means that ignition starts in cylinder #1, then cylinder #8 on the 2nd bank, followed by cylinder #4 on the 1st ...Dec 18, 2023 · 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. 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 “. There is a ton of information out there for adjusting valves, and it can be very confusing at times. Everyone thinks their way is the right way, which it ver...Apr 21, 2024 · Decoding the Chevy 350 Firing Order. Your Chevy 350 is like a bunch of partygoers firing spark plugs (instead of confetti). The firing order is the order they take turns lighting up. In a 350 V8, it goes 1-8-4-3-6-5-7-2. This order keeps the engine running smooth, like a well-choreographed spark plug lighting show! Mess it up and things can get ...

Jun 20, 2012 · But in a race application, there are various firing orders that can effectively improve power and reliability in an engine. Typically, there are seven other firing order arrangements which can be used without changing the crankshaft layout on a Chevrolet V8. These firing orders include the following: 1-8-4-2-6-5-7-3 1-8-7-2-6-5-4-3 1-8-7-3-6-5-4-2

350 Chevy Small Block Firing Order. The 350 Chevy Small Block engine has a firing order of 1-8-4-3-6-5-7-2. The firing order is the sequence in which the spark plugs fire, starting with cylinder number one and ending with cylinder number eight. The firing order is important because it ensures that the spark plugs fire in the correct sequence.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 …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... So, if you’re a proud owner of a Chevy 350, or simply interested in learning more about engines and their inner workings, keep reading! The firing order for a Chevy 350 V8 small block is 1-8-4-3-6-5-7-2, while the firing order for a Chevy 350 V8 big block is 1-8-4-3-6-5-7-2 as well. When it comes to the firing order for a Chevy 350 V8 engine ... 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 ...Firing order of our SBC/BBC BluePrint Engine line. Knowledge Base Go to www.blueprintengines.com ... All of our small block and big block Chevy engines have the following firing order: www.blueprintengines.com Help Center. Go to www.blueprintengines.com ...A typical Chevy firing order is 1-8-4-3-6-5-7-2. For the vast majority of applications, this firing order works nicely and there s probably no need to change it. But in a race application, there are various firing orders that can effectively improve power and reliability in an engine. ... I run an LT1 engine which is a newish small-block from ...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.

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Jun 7, 2013 ... A hot rod engine or a full tilt race engine. It is worth something across the board for every Chevrolet V-8 engine made. Gasoline and Carbs ...Feb 16, 2021 ... Using online manuals (or search engines) to look up and determine firing order, distributor placement and companion cylinders.The illustration on the right is of a small-block Chevy with a cross-plane crankshaft that creates a firing order that fires two cylinders on each bank consecutively – making 180-degree header tuning much more difficult. The curved lines indicate the adjacent firing cylinders on each bank.Sep 25, 2023 · 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 ... Firing cylinder 3 after 1 gives the exhaust gas sufficient time to leave the engine, thus helping you to prevent excessive pressure in the exhaust pipe. If you drive a four-cylinder LT1 engine, the possible firing orders are 1-3-4-2 or 1-2-4-3. However, the 1-3-4-2 firing sequence is the more commonly used.Any top quality engine you look at will have shaft type rocker arms on it, whether its NASCAR, NHRA or Bonneville racing. The reason is they are the strongest, most reliable rocker arm money can buy. These include fully machined aluminum rockers, premium centerless ground shafts and needle bearings, alloy fasteners and tool steel lash …The stroker 305 is popular because the 305 small-block is probably the most easily accessible small block Chevy engine on the planet. ... in the small-block Chevy with its firing order 1-8-4-3-6-5 ...This tri power kit uses the Edelbrock C-357-B S/B Chevy 3x2 intake with Speedway's 9 Super 7® carbs. It has progressive linkage to give you …Engine builders have also experimented with these firing orders on existing engines, in particular on the Chevrolet small-block. A camshaft swap is required, as it controls the cylinder firing sequence. Obviously this requires a custom ground camshaft, although some are available off the shelf for popular engines like the Chevrolet small …The Chevy big/small-block engine VIN (vehicle identification number) is a combination of digits that indicate the type of vehicle the engine is installed in, the model year, and the assembly plant. The engine VIN also contains six digits that are used to denote the last six digits of the vehicle’s VIN. The engine’s VIN is important to some ...Learn the firing order sequence for the Small and Big Block Chevrolet engines, including the 283, 302, 305, 307, 327, 350, 400 and 5.7L. The firing order works for both HEI and old …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 utilizes a distributor. For the spark plugs to fire correctly, the Chevy 350 must be wired this way. ….

Both hydraulic and solid versions are available. The design is essentially an LS cam using a longer core with a rear distributor drive gear. Instead of the stepped cam journal diameters like the LS, all cam journals are 55mm. The nose accepts a small block Chevy cam sprocket. Firing order retains the LS order of 1-8-7-2-6-5-4-3.Reduced crankshaft torsional vibration was the main reason GM adopted the LS engine’s 1-8-7-2-6-5-4-3 firing order (4-7/2-3 swap for SBC). According to GM engineers, computer modeling showed that the …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 utilizes a distributor. For the spark plugs to fire correctly, the Chevy 350 must be wired this way.I know the firing order for a small block Chev. I just don't know the location of number 1 plug wire on the HEI cap. ... The firing order on a SBC 350 V8 is...1-8-4-3-6-5-7-2. If you are planning to replace your ignition wires always do 1 wire at a time. ... This thread contains the pictures you want. number 7 sits just before the BAT/TAC ...Reference material on the firing order and torque specs of a Small Block Chevy. Our guide covers popular SBC V8 Torque specifications so you can be sure you're getting peak performance.Jun 30, 2014 · Originally Posted by 7T1vette. The order is 1-8-4-3-6-5-7-2 in the clockwise direction looking down at the top of the distributor. But, the #1 plug wire can be made to work in ANY one of the available positions. Also, there are some camshafts that are made with a 1-8-7-3-6-5-4-2 order (supposed to run a bit smoother and make a smidgen more power). 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 ...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. Also remember that the position of the spark plug wires does not matter AS LONG AS THE ORDER IS MAINTAINED! If you need to rotate the cap for any reason don't worry about pulling ... Firing order for a small block chevy, Sep 29, 2021 ... What's Up Everybody! Today we are doing a walk around of some of our small block Chevy engines. We have a 327 and 2 350's (one older, ..., The 454 V8 has a firing order of 1-8-4-3-6-5-7-2. This means that the cylinders are numbered starting from the front of the engine on the driver’s side. The firing order of 1-8-4-3-6-5-7-2 means that the spark plugs in the cylinders fire in that sequence, starting with cylinder 1 and then proceeding to cylinder 8, then to cylinder 4, then to ..., The Chevy 350 belongs to the Chevy small-block engine family. They’re called “small-block” or SBC because they’re smaller than big-block crate engines, or BBC (262 to 400cu’s, as compared to the BBC’s 348 to 572cu displacement). However, the firing order for the Chevy V8, both the SBC and BBC variant is the same: 1-8-4-3-6-5-7-2., Yes, this is the firing order for a small-block Chevy, but also for millions of other early V8s from musclecars and beyond. AMC, Mopar, Buick, Olds, Pontiac, and even International and Studebaker also used 1-8-4-3-6-5-7-2, so when you’re wearing this DF hoodie in public I guarantee that other gearheads will come out of hiding and say, "hey, I ..., 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 ..., Jun 30, 2014 · Originally Posted by 7T1vette. The order is 1-8-4-3-6-5-7-2 in the clockwise direction looking down at the top of the distributor. But, the #1 plug wire can be made to work in ANY one of the available positions. Also, there are some camshafts that are made with a 1-8-7-3-6-5-4-2 order (supposed to run a bit smoother and make a smidgen more power). , follow the diagram when changing your spark plug wires over. It is always good to replace each new wire one for one with the old wire, rather than to take th..., 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., May 10, 2022 ... follow the diagram when changing your spark plug wires over. It is always good to replace each new wire one for one with the old wire, ..., 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 …, Firing order of our SBC/BBC BluePrint Engine line. All of our small block and big block Chevy engines have the following firing order: , The 454 V8 has a firing order of 1-8-4-3-6-5-7-2. This means that the cylinders are numbered starting from the front of the engine on the driver’s side. The firing order of 1-8-4-3-6-5-7-2 means that the spark plugs in the cylinders fire in that sequence, starting with cylinder 1 and then proceeding to cylinder 8, then to cylinder 4, then to ..., If it follows the normal big block chevy order, it is: 1-8-4-3-6-5-7-2. Hope helps (remember rated this). Posted on Jul 13, 2010. Kelly. Master. 3,740 Answers. There are 2 versions of this engine with different firing orders. The "ZZ572" crate motors come in two versions: one with 572/620hp has a 9.6-1 CR and runs on pump premium gas., Spark 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 Small and Big Block MOPAR motors have the same firing order but it seems the difference is that the distributor rotates a different direction. The small ..., But in a race application, there are various firing orders that can effectively improve power and reliability in an engine. Typically, there are seven other firing order arrangements which can be used without changing the crankshaft layout on a Chevrolet V8. These firing orders include the following: 1-8-4-2-6-5-7-3 1-8-7-2-6-5-4-3 1-8-7-3-6-5-4-2, 3971 posts · Joined 2003. #5 · Jan 4, 2004. Ford 351W and 5.0s have one firing order. 302 and 289s have another. When you change the cam you change the plug wires to match. I have never heard of any difference in idle quality. Like., 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 ..., 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..., 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., Building a small block Chevy has many, many combinations of cylinder heads, cams, intakes and other parts to totally custom build the engine you want for your purpose. JEGS carries thousands of performance parts for the small block Chevy at everyday low prices! Block: Left rear, top of block just forward of the bellhousing mounting surface., Jun 21, 2023 · Spark 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 ... , In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. Since 2003, Jeff has held various positions at Car Craft (including editor), has written books on small block Chevy performance, and even cultivated an impressive collection of 1965 and 1966 Chevelles., The firing order of an internal combustion engine is the sequence of ignition for the cylinders. In a spark ignition (e.g. gasoline/petrol) engine, the firing order corresponds to the order in which the spark plugs are operated. In a diesel engine, the firing order corresponds to the order in which fuel is injected into each cylinder., Intake 1-2-5-7. Then crank the engine one more complete revolution which will bring Number 6 cylin-der to the firing position at which time the following valves may be …, The firing order for a Chevy small block V8 engine, including the 305 cubic inches model, is 1-8-4-3-6-5-7-2. The firing order represents the numerical sequence in which the spark plugs are fired. To determine the insertion position of each spark plug wire on the distributor cap, visualize a clock face. The insertion sequence around the cap ..., 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,..., Let's explore some of the common firing orders utilized in the Chevrolet 350 Smallblock engine: 1-8-4-3-6-5-7-2 (Standard Firing Order): This firing order represents the traditional sequence employed in many Chevrolet 350 Smallblock engines. It is renowned for its balanced cylinder firing pattern, contributing to smooth operation and …, Let's explore some of the common firing orders utilized in the Chevrolet 350 Smallblock engine: 1-8-4-3-6-5-7-2 (Standard Firing Order): This firing order represents the traditional sequence employed in many Chevrolet 350 Smallblock engines. It is renowned for its balanced cylinder firing pattern, contributing to smooth operation and …, Dec 31, 2023 ... The firing order for the Chevy 350 small block is 1–8–4–3–6–5–7–2. To break it down: Cylinder Numbers: The cylinders on the driver's side (left ..., 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 ..., Am trying to get info on my small block chevy. Casting number is 3970010. Stamped numbers are V0205ZAH and 19S423482. ... LS Firing Order & Cylinder Numbers. 1999-2022 Chevy 5.3 Oil Capacity Free Lookup. GM/Chevy Engine Serial Number Lookup. Small/Big-Block Chevy Engine Code Stamping Numbers. 6 Best Tuners For 5.3 …, The big block firing order swap is done for increased ride comfort. The 4/7 cam is responsible for the modification of the firing sequence of the engine. It does this by moving the power stroke of cylinder 4 to the position formerly occupied by cylinder 7, and vice versa.1-8-7-3-6-5-4-2 is the new firing order for a standard Chevy.