Without it, the engine would essentially cease to function. The tradition V8 firing order. A good rule to follow is to machine the crank journals to the bearings, and swap bearings around to get optimum clearances. Once allowed to cool, final polishing and finish work are performed. Preparationshould include Magnafluxing (electromagnetic process of checking for cracks), grinding, polishing, radiusing the journals, and removing all of the stress risers (crack prevention). The Ford engineers did a great job of designing the small chambers and the location of the spark plug on the early 4-V heads. This looks like two four cylinder engines that have been joined together at the crankshaft. Comp Cams has a retrofit deal for this combination. A flat plane engine's crankshaft throws its pistons 180 degrees, creating a shape that from an aerial view would look a lot like a straight line. Trick Flow Specialties, as one example, offers several different 351C/351M/400 cylinder head part numbers, which enables you to fine tune your cylinder head selection. Found in the video archives over at Lingenfelter Performance Engineering, the tuning company's mad scientists once took an LS Small Block V8, swapped out the stock crankshaft. In fact, Ford planned 500+ cubic-inches for the big block, which never materialized amid environmental concerns and the Arab Oil Embargo. of torque at 3,800 rpm. With 526 horsepower and a soundtrack like this, it's easy to see why it has been attracting attention. The 5.2's connecting rods attach to the flat-plane crank at 180-degree intervals versus a normal V-8's 90 degrees. The 4M crank has a 3.500-inch stroke and a 2.750-inch main journal. The 351C block is easily distinguished. A cross-plane engine throws its pistons in 90-degree angles, creating a "cross" design when viewed from above. The offenhauser power port short runner tunnel ram with twin 600 Holley vac sec carbs, 12.4 trw pistons, and 108 lobe center sig Erson hi flow I M cam running AV gas was absolutely a rocket ship on the street. The 351C has a 9.206-inch deck height. Seal end gaps should be staggered away from main cap parting gaps. A nearly molten steel alloy ingot is heated to approximately 2,200 to 2,600 degrees F and rammed into the shape of a crankshaft in a die at an excess of 240,000 psi. Could be duplicated better with new technology. SBF. Apr 10, 2023, Crankshaft, External Balance, Forged 4340 Steel, 4.000 in. He's authored several books on performance engine building and written numerous articles for publications like Hot Rod, Car Craft, Super Chevy, Power & Performance, GM High Tech, and many others. Automakers engineer tremendous strength into even the most modest cast-iron crankshafts. The 11.0:1 Probe pistons were designed for use with the stock connecting rods. Regardless of how you look at this dynamic, cyclic issues affect crankshaft life. valve pockets in the right place came out to be like 390ish ci. Stroke, External Balance, Ford, 351C, Each, Estimated USA Ship Date: My understanding is that the only reason you would be using a flat plane crank is to get the benefits of even exaust pulses, eg scavaging effect from one side of the engine, instead of crossing over the pipes ah la GT40 etc. ProFlange is a King line of bearing sets with oversize flanges, which allows the cranks thrust to be ground to .010-, .020-, or .030-inch undersize. In North America, it was only in production for four years (1970-74), yet it became the hotrodders mainstay in Australia well into the 1980s. The original 4V, 2-bolt, 351C was disassembled and treated to some first-class machine work by L&R Automotive. The Speedmaster and Edelbrock lines offer a number of terrific cylinder heads for the Cleveland engine family. International Customer Options|In the United States? Notice the tiny rust spots in this journal? Mar 16, 2023 Check out our selection of Molnar connecting rods also and get a set of rods that will be the perfect match for your new Ford 351 stroker crankshaftor Late Model Stock racing crank. Estimated International Ship Date: The flat-plane crankshaft from Ford's 5.2-liter Voodoo V-8. Stroke, Internal Engine Balance, Forged 4340 Steel, Ford, 351C, Each, Estimated USA Ship Date: document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. 351C/425HP Balanced Crate engine with Aluminum heads. . The 351M also had a 1K mark later in production. . Meanwhile, in Australia, Ford continued with great improvements in the 302 and 351C engines. Estimated International Ship Date: Ships In a Few Days. I believe Marvin used a small-block Ford spider. Juechter said that the team spent around a year developing the aural. The 351C arrived in 1970. May 1, 2023 Crankshaft endplay is .004 to .010 inch. Why didnt they do a test with the stock intake manifold and the cam upgrade? The 90 degree V8 is made with two different type of crankshaft, the flat-plane and cross-plane: . How is it you can easily add nearly 100 hp to your 351 Cleveland? if ordered today, Engine Rotating Assembly, Forged, Crank, Forged, Pistons, I Beam Rods, Ford, 351 Windsor, Kit, Engine Rotating Assembly, Series 9000, Cast Crank, Forged Pistons, I-Beam Rods, Ford, Cleveland, Kit, Estimated USA Ship Date: The 400 was a square engine meaning it had the exact same bore and stroke4.000 inches by 4.000 inches. Expect to see 1K for 351M. Ford's decision to terminate 351C production was rooted in scaling down production costs. These cranks can be used in a 351W block by using the appropriate bearing spacers. to 452 horsepower and 412 ft.-lbs. A flat plane crankshaft has the potential for significant weight savings to optimize a motor's moment of inertia and more even firing to benefit the exhaust stroke, allowing for more revs/horsepower. I wonder if you feel a bit stupid after rushing to judgement about 4V heads. Diameter Main, 4.00 in. Jan 25, 2012 #1. Specialized formulas for forged steel cranks vary from manufacturer to manufacturer. The 351M and 400 have a taller deck at 10.297 inches. Think I will use Trick-Flow Aluminum Heads though, Your email address will not be published. After our baseline, we replaced the Elgin CJ cam and 4V intake with a Comp XE284H cam and Edelbrock Performer RPM Air Gap intake. Codes 4M, 4MA, or 4MAB indicates a 351C or 351M crankshaft with a 1.750-inch throw or 3.500-inch stroke. 29/09/2022. Apr 9, 2023 Click the button below and we will send you an exclusive deal on this book. Was a 71 cj. Monday 3/6/2023 May 8, 2023 Cast Crank shaft with 90% nodularity; . A cast crank has fewer flaws as a rule and generally has a rough surface with narrow parting lines. Mar 29, 2023 ( 1 ), Street & Strip, Series 9000 Rotating Assembly. The motor is going back in my 79 bronco, so I dont really want a screamer, just really good power and torque. The factory crank was first polished then balanced with the entire reciprocating assembly that included new Clevite rod and main bearings. The 4.000 stroke crank is very popular for building a small block Ford 408 stoker engine. The exhaust pulses in the headers are evened out. Also I believe a flat plane crank is not as balanced as a 'normal' crankshaft and will introduce more . Short of a flat plane crank or 180 degree headers, no, you will not get the even exhaust pulsing you are after. Its production and service life was all too brief, unfortunately, lasting through the 1974 model year. A flat-plane or cross-plane crankshaft can have a major influence on a V8 engine's characteristics. Ford 351 Cleveland engine - 10.2:1-C/R. Theres steel billet on the high end, plus forged steel, malleable steel, and nodular iron (cast iron). . Yes this set up is pretty weak, wrong cam type. The 351C and 351M are not the same engine, by the way. SBF. However, I will never understand Ford for its port sizing. [] Try this experiment: Mention four-valve (4V) Ford to a few fellow enthusiasts and see what discussion pops up. lol. Some machinists are good with .030- and .040-inch undersize, which is discouraged because it tends to negatively affect hardening. A friend / customer a few years back who ran a 3200 '66 Fairlane with a 351 4 V. Cleveland, a Ford Motorsports solid flat tappet on a 106 or 108 LCA, top loader @ 5.13's. Ran a best of 11.61 @ 121. VPE Crankshaft_4340 Forged Steel_Ford 351 Cleveland_4.100 Stroke_2.100 Journal_6.200 Rod_ 1 piece/2 piece_Internal Price $980.00 P/N: 1103-10026 Internal Balance of torque at 3,800 rpm. Radiuses of both bearing and fillet must be identical for perfect mating and without stress issues. Wednesday 2/15/2023 In episode 32 of RoadKill Garage, David Frieburger and Steve Dulcich build a 351 Cleveland Stroker. They are different beginning with the block and its internals. The cranks torsional action rebounds against the piston and rod as they ascend on the compression stroke. offers several different 351C/351M/400 cylinder head part numbers, Performer LB 351-4V dual-plane manifold (EDL-2665), MSDs Pro-Billet Ready-to-Run distributor, https://www.compcams.com/retro-fit-hydraulic-roller-installation-kit-for-ford-289-351w-351c-351-400m.html?gclid=Cj0KCQjwvZCZBhCiARIsAPXbajsvolWJmoEhQ8__w_3jfoTRrAo75vLwzIpJOBdHgEcxojFcEnFXzB8aAsYlEALw_wcB. You can safely get 408 inches from a production 351 Windsor block and the aftermarket has plenty of stroker kits to choose from. Actually I much prefer the 4V on the street and for great responsive low end power. Who makes the lifter spider and dog bones for a Cleveland? Terms of Use | Privacy and Security | Site Accessibility Just saying. Summit Racing can help. Stroke, External Balance, Ford, 351C, Each, Crankshafts, Cast, 2-piece Seal, Cast Steel, 4.100 in. Done the same as article with the exception of slightly larger crane solid lifter cam & an old school torquer intake & H/S rockers . First, we know that a conventional V8 engine is designed to generate a power stroke every 90 degrees of crankshaft rotation. The cylinder bore spacing and head bolt patterns of Cleveland and Windsor heads are identical which makes the better flowing Cleveland heads a natural choice. Fords 335 Series Cleveland existed in two forms in North Americathe low deck 351C and the raised deck 400 and 351M. The as-cast, production Boss/351C 4V heads flowed a whopping 275 cfm! Understanding how to build power into a Cleveland boils down to knowing how to choose the right cylinder head for these engines. The 351C crank is marked with an identification number of 4M or 4MA. The cross-plane design has one throw every 90 degrees at north, east, south, and west positions. The Basic Flat Plane Crankshaft Stevie's Crazy Garage 1.23K subscribers Subscribe 1K Share 113K views 7 years ago This video uses rendering techniques to explain the basic concepts of a flat. All 335-series Clevelands are 28-ounce offset balanced. If youre going to treat it to nitrous or a blower, you want steel to reduce the chance of breakage. Wow no dyno but that thing pulled like a Bear 3500/ 7500ish! Stock Crank and rods, 30 over trw 2348 pistons, OC heads cut .060 59cc, Ported intake and exh. Targeted bob weights. Then, you load the crank with a wideopen throttle. It looks very similar to an Inline-4 crankshaft, albeit with longer crank pins to accommodate two big ends. (3), Procomp Electronics Forged-43 Crankshafts PCE276.1053, Scat Forged Standard Weight Crankshafts 4-351C-4000-6200, Procomp Electronics Forged-43 Crankshafts PCE276.1124, Procomp Electronics Forged-43 Crankshafts PCE276.1058, Procomp Electronics Cast Crankshafts PCE276.1110, K1 Technologies Forged Crankshafts 011EAD400, Procomp Electronics Cast Crankshafts PCE276.1117, Procomp Electronics Forged-43 Crankshafts PCE276.1062, Procomp Electronics Cast Crankshafts PCE276.1147, Scat Forged Standard Weight Crankshafts 4-351C-3500-6000, Scat Forged Standard Weight Crankshafts 4-351C-4000-6000, Eagle Forged 4340 Steel Crankshafts 435640006000, Scat Forged Standard Weight Crankshafts 4-351C-3850-6000, Scat Forged Lightweight Crankshafts 4-351C-4000-6200-2, Procomp Electronics Forged-43 Crankshafts PCE276.1049, Procomp Electronics Forged-43 Crankshafts PCE276.1059. if ordered today, Engine Rotating Kit, Forged 4340 Steel Crankshaft, Forged Aluminum Flat Top Pistons, H-Beam Rods, 2-Piece Seal, Ford, Cleveland, Kit, Estimated USA Ship Date: $550 to $720 * Crankshaft weights are approximate depending on target bobweight. Bryant Crankshafts Watch on ABOUT US Bryant Racing Home of the Crankshafts that Champions Choose Main thing is a detailed inspection and good prep work going in. + The flat-plane crank depicted in the excellent animation has its throws arrayed in an up-down-up-down (UDUD) configuration, the same type used in Ford's recent Shelby Mustang GT350 V8. Holdener routinely does his dyno testing at the Westec facility which provides access to race fuel which is what he typically uses for best results in all of his builds. It still runs to this day. You can order this part by Contacting Us. It really depends on how you will treat an engine at 450 hp. The machine work included boring and honing the block to accept a fresh set of .030-over, forged slugs. Im not doubting that this build produced a very strong engine but, cmon Summitdo some proof reading before posting something like this! This is why you must pay close attention to the fillet area with proper machining and finishing technique, plus the bearings smooth and comfortable relationship with the fillet. In high-performance applications, you want it midway between .004 and .010 inch and closer to .010 if possible. The balanced rotating assembly (typically includes crankshaft, pistons, rings, connecting rods, rod bearings, and balancer) featured in this engine: Estimated International Ship Date: We have 1,100 plus programs for our FORD cranks, from the 302 to the 351 to the 429 JC50 to choose from. This causes more vibration than a cross-plane crank would, but it has the effect of spacing cylinder firing so that exhaust pulses exit the ports and merge in the exhaust pipe with . Where you must be attentive is main journal size because its easy to unknowingly pick up a 351M crank, which has the 400s larger 3.000-inch main journals along with the 351Cs 3.000-inch stroke and rod journals. The motor mounts on a Cleveland and Windsor are the same, the 351M is quit a bit different, 351c amd M have the same valve covers while the Windsor is the same as the 289,302 . Not sure which Ford 351 youve got? The engine is part of Ford's "335" engine family, which is a group of 90 degree, overhead valve, V8 engines. Thanks for the great article. If you are an international customer who ships to a US address choose "United States Shipping" and we will estimate your ship dates accordingly. of 20, Crankshafts, 1-piece Seal, Forged 4340 Steel, 4.100 in. Apr 20, 2023 Probably can get the compression to 9.7 to 1 . Cleveland crankshaft identification is easy and based on codes stamped into the first counterweight. 1980-1981 Fox Body Mustangs. Hi, 351 Cleveland/Windsor Stroker kit includes: 4340 Forged crankshaft (90% possible internal balance without adding heavy metal) Forged H-beam rods W/ 7/16 ARP 2000 bolts (Exclusive Centralign design) Custom forged CP-Bullet flat-top pistons; King performance rod and main bearings; CP (Mahle/NPR) ring set, 1.5MM, steel top ring, Napier 2nd ring . Cleveland 300 hp cam they would discover what made those heads work , and yet be suprised it made peak power at 5,400 rpm , i am currently building one for a 69 Mach 1 i am using tbe aluminum speedmasger raised port 3v head with just a light port clean up and allot of combustion chamber work mostly removing the wall around the valve seat , cam will be a Lunati roller 231@.050 112 lobe sep .610 10:1 comp , port efi . You can also visit the ROUSH Competition Engines direct website. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Results 1 - 20 You just have to decide which cylinder head is right for your application. In short, what did the 351 Cleveland motor have that the other Fords (like the Windsor), or even the competition over at Chevy and Dodge, didnt? MaxFlange is a process used on all King engine bearings. This 351C counterweight has been welded either as a repair or for dynamic balancing where metal was added. The 351C has smaller 2.750-inch main journals, which means you would need the journals turned down by a competent machinist. This 351C was shipped to Marvin from the Midwest with its share of issues. But NVH control is a problem: hence widespread adoption of crossplane crankshafts. And when machining the crank, micropolish the journals to get the best oil fl ow and wedge. Stroke, Ford, 351W, Cleveland Mains, Each, Crankshaft, 4340 Steel, 2.750 in. It all moves violently with changes in power application. Hank The Crank began producing steel Cleveland cranks in 1974 for drag racers such as Jack Roush. It reduces crankshaft endplay by supplying a flange on the high side of the tolerance to compensate for excessive crankshaft thrust wear. Today, the 4V designation best differentiates the 4.6L Modular Ford family from the lesser 2V combos, or conjures up a conversation on 5.0L Coyotes. May 8, 2023 Stroke, Ford, 351W, Cleveland Mains, Each, Estimated USA Ship Date: These 1971 heads got us half way to our performance goal, by featuring the desirable (smaller) quench chambers. Where other Ford V-8 engine families had both cast and steel crankshafts, the 351C was produced in cast only. Unported, just minimal valve pocket clean up on 4 V. Cleveland cylinder heads. There is also the other vibrations that the flt crank produces that can cause things to break. If you take a small hammer and tap a forged crank, it rings like a bell with a long resonance afterward. It sounds more trustworthy than cast iron, but it is nothing more than nodular iron. 13 Products Found . Run first with the stock 4V intake and mild CJ cam, the Cleveland produced 359 horsepower at 5,700 rpm and 372 ft.-lbs. #11. Build times vary. Excessive thrust clearance is more common with manual transmission Clevelands due to clutch activity, which leans on the main thrust heavily each time the clutch is disengaged. A target bobweight of plus-or-minus 2 percent means less balancing time. 4V stands for four-venturi, not for four-valve as the article incorrectly states. Thanks. May 1, 2023 Detonation issues drove car owners crazy with these heads. When you have significant differences in weight, an engine balancer may have to add Mallory metal, which adds weight to counterweights where necessary. The strength of a steel billet crank comes from its onepiece nature and alloy makeup, which has been machined into a crankshaft. In short, it is a crankshaft that makes it part of an automobile engine. In the early 1920s, Cadillac and Peerless pioneered the smoother crossplane crankshaft, a design that revolutionized the American V8. Summit Racing offers you an abundance of great aftermarket 351C heads that are also available for the 400. You spend so much time focused on journal surfaces, oil hole chamfering, and balance you forget to examine fillet radius and the bearings important relationship with it. Learn how your comment data is processed. 'New' Lightweight SBC Crankshafts An all new forging that moves the moment of inertia outwards, to make a lighter shaft with good harmonics. Instead of hammering molten 2,600-degree F metal into shape, it applies tremendous pressure to the nearly liquid metal. Shop Connecting Rods SCAT connecting rods are made from a 2-piece chromoly steel forging to ensure maximum strength and durability. Your email address will not be published. We all know that 4V stands for 4 venturi, a.k.a. K1 Small Block Ford 3.400 Stroke 302 Forged Crankshaft 011DAI340. Given the flow rates, even this modified 351C was just scratching the surface of what OG 4V heads will support! 857 3558 $ - All are externally balanced. Summit Racing will BEAT any competitor's advertised price! Aside from the obvious stress, there are other loads such as oil pump and distributor, which also contribute to twist. These parts don't work together! Forged steel crankshafts are typically made of 4340 hardened steel. This is a custom order part. With the reduced rotational mass, the inertia point. The 351C became the darling of the performance industry from 1970 to 1973, nothing negative was written about the 351C during those years, there was no commentary about the intake ports being . What this means is that they respond very well to other performance mods, like a healthy cam and improved induction system. Stroke, 2.75 Mains, 351C, Kit, 2.0 out of 5 stars 351w crank stroke and ground to 2" chevy crank pin. Check out the many premium features included with eachMolnar 351W and 351C crankshaft and order today to get started on your next engine project. Endless clevo dyno tests but everone going with the mismatch and not expaing why. 2023 Chevrolet Corvette Z06 (Chevrolet) The 2023 Corvette Z06 trades the Corvette Stingray's 6.2-liter V8 for a 5.5-liter V8 that's more powerful, even without any supercharging or turbocharging . Grade depends on the alloy and quenching (heat treating). The 351C-4V cylinder heads were great high rpm heads with their drive-through ports, which are happiest at 7,000 rpm, but frustrating on the street because they deliver poor low-to-mid-range torque for the street. Maybe a little correction is in order, just for accuracys sake? The aftermarket has followed suit in the years since with a great selection of cast, steel, and steel-billet Cleveland cranks. Ie timing & heads. Searched everywhere about port matching airgap or most modern manifolds to the 4 heads and found nothing. The thing to remember about crankshafts is that they twist and fl ex as combustion pulses hammer each journal and you put a load on them, which oscillates material such as rubber back and forth. Ford added insult to injury with the 1973-74 4V head with huge ports and the 2Vs open chambers to get compression down. Estimated International Ship Date: Also mill the cylinders heads down to make combustion chambers smaller. Yes, Ford did a 302 cubic inch Cleveland with even smaller 54-57cc 4V wedge chambers with good quench. 50 pound Legal with rounded leading and trailing counterweight edges. Oh, how quickly people forget! Mar 20, 2023 345/210@.600, 12.29 comp, Comp Hyd roller .612/245 dur (not a great cam but low DCR allows 93 octane) AWESOME sound!, Sheetmetal intake, EFI Megasquirt, 2-1050 cfm 4barrel throttle bodies, C4 with GV overdrive and 4k stall, 380 gears.