Flat-plane crank - Wikipedia Ive only had the opportunity to build one Cleveland. Once the forging is trimmed and machined, it gets nitrided for good surface hardening. Cast iron production Cleveland heads can be used but finding a good pair and having them machined for an adjustable valve train can get expensive. Were working with the late Marvin McAfee of MCE Engines in Los Angeles on a 351C he was building back in 2008. I thought one or two of you guys might enjoy reading my ramblings about building 351C 4V street performance motors in the 1970s. A cast-iron crank rings, but not with the clarity and crispness of a forged crank. Is it just a repurposed small block Chevy part? I would love to build this motor for my 66 Mustang I have a Heidts pro-G IFS suspension so no fitment issues .
The Basic Flat Plane Crankshaft - YouTube The answer lies in the massive head flow offered by the 4V heads.
The cross-plane design has one throw every 90 degrees at north, east, south, and west positions. With 526 horsepower and a soundtrack like this, it's easy to see why it has been attracting attention. 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. Ford's 351ci Cleveland middle block entered production more than three decades ago in the fall of 1969. if ordered today, Crankshaft, Ford 351C 4340 Forged Steel Crankshaft ST-4.170 M-2.749 MRL- 6.0 Bal-Ext. Cant wait. 302 351 Cleveland 4 barrel 2v manifold in good condition.
DONT CHIME IN ON CONVERSATION YOU OBVIOUSLY need to do some of your own proof reading Mr negatively. This 351C was shipped to Marvin from the Midwest with its share of issues. Although it is widely believed you shouldnt race with a cast (nodular) iron crankshaft, you can race on weekends with a cast crank without consequence if you prepare accordingly. The billet crank begins life as a cylindrical steel ingot, which enters a labor-intensive process of many machiningsteps before it looks like a crankshaft. There are three factory nodular iron crankshafts identifiable by markings, stroke (throw), and main journal dimensions. BTW the M has a 351 Windor crank in it. Stroke, External Balance, Ford, 351C, Each, Crankshaft, 2-Piece Seal, Internal Balance, Forged 4340 Steel, Custom Order, Ford, 351C, Crankshaft, Internal Balance, Forged 4340 Steel, 3.500 in. Was a 71 cj. Demonstrating that the stock 4V heads had much more power to offer, the cam and intake upgrade increased the power output by nearly 100 horsepower, pushing the peaks to 452 horsepower and 412 ft.-lbs. Both designs attach two connecting rods to each throw and their blocks have 90 degrees between cylinder banks. It reduces crankshaft endplay by supplying a flange on the high side of the tolerance to compensate for excessive crankshaft thrust wear. Also mill the cylinders heads down to make combustion chambers smaller.
The 351C, 400, and 351M crankshaft identification is 4M for the 351C and 5M for the 400.
GM puts upcoming Z06 Corvette V8 on a different plane - SAE International Ford 351 Cleveland HP1 Engines - Port City Engines
Flat-Plane and Cross-Plane Crankshafts | CJ Pony Parts Trick Flow has the broadest selection of heads in the marketplace engineered specifically for the 335 Series Ford middle-blocks. The 351C 4V motors, and even the smaller 1969 & 1970 Boss 302, offered head flow unmatched by any (regular) production small block Ford, Chevy, or Dodge heads of the period.
I have to admit, although I am telling you how to treat a Clevelands factory internals, it makes more sense these days to pump up the displacement and get more durable components in the process with a good aftermarket stroker package. [] erecting one from scratch, which you can do with a Ford Performance BOSS block (M-6010-BOSS302) and Cleveland heads.
May 8, 2023
See the corner on a 4bbl Cleveland head it has a 4 cast in it , 2bbl has a 2 ,never had a V on either head !!! 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. For this test, we wanted to illustrate just how much power was lurking in the massive 4V Cleveland heads, so we put together a near-stock displacement test motor. Theres steel billet on the high end, plus forged steel, malleable steel, and nodular iron (cast iron). if ordered today, Engine Rotating Assembly, Forged Crank, Forged Pistons, I-Beam Rods, Ford, Cleveland, Kit, Engine Rotating Kit, Outlaw Series, Forged 4340 Steel Crank, Forged Aluminum Flat Top Pistons, H-Beam Rods, 2-Piece Seal, Ford, Cleveland, Kit, Estimated USA Ship Date:
Crankshafts and camshafts are ductile or nodular iron (ASTM A339) at 310 on the Brinell hardness scale. You also want to crossdrill where necessary and chamfer oil holes to improve oil fl ow at the journals.
Stroke, Ford, 351W, Cleveland Mains, Each, Estimated USA Ship Date:
For example, Scat Enterprises forging process uses a pressure technique instead of a traditional slambam hammer approach to make its forged steel cranks. Part number 31-1000 from Comp (https://www.compcams.com/retro-fit-hydraulic-roller-installation-kit-for-ford-289-351w-351c-351-400m.html?gclid=Cj0KCQjwvZCZBhCiARIsAPXbajsvolWJmoEhQ8__w_3jfoTRrAo75vLwzIpJOBdHgEcxojFcEnFXzB8aAsYlEALw_wcB).
Read this: Whats the Difference Between a Ford 351 Windsor, Cleveland, or Modified Engine?
~351C 4V Street Motors in the 1970s - Cleveland's Forever 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 Instead of hammering molten 2,600-degree F metal into shape, it applies tremendous pressure to the nearly liquid metal. 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 . The 12.5:1 compression ratio is abetted by forged-aluminum pistons which have startlingly short skirts and are . Codes 4M, 4MA, or 4MAB indicates a 351C or 351M crankshaft with a 1.750-inch throw or 3.500-inch stroke.
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Igor a 1970 Mach 1 with shaker hood. 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?
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However, I will never understand Ford for its port sizing. Here's a 351C-2V combination that will run on premium 91 pump gas (9.2 compression) I developed over 20 years ago but looking back, it was a superbly balanced street performance set-up and a real blast to drive in the 73 Mustang I had at the time.
It mentions 4v and says 4 VALVE.. Lol cast heads have a tiny 4v on the corner of the head. 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. The LT6 is comprised of a two-piece aluminum block mated at the crankshaft centerline and topped by aluminum cylinder heads. May 1, 2023
We have rebuilt tons of customer engines over the years that were all wrong and had parts that didn't work together. A crankshafts primary job is to convert heat energy into rotary motionand power. I love my 351 Cleveland. The referal to 4 Valve only confuses you and others less versed in the Ford world. A steel crank has smoother surfaces and wide parting lines due to the violent forging process. .
Forged steel crankshafts come from a more involved process. And that unique sound! Time was when you mentioned 4V, people [] Read full article at http://www.onallcylinders.com []. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Mar 29, 2023
For many, particularly the boys down under, 4V means ONE thing, Cleveland performance. It still runs to this day. The flat-plane crankshaft in the Ford Shelby GT350 Mustang's 5.2-liter V8. These cranks can be used in a 351W block by using the appropriate bearing spacers. Cast is good for anything up to 450 hp.
Stay Updated with Emails from Summit Racing. The aftermarket has followed suit in the years since with a great selection of cast, steel, and steel-billet Cleveland cranks.
We finished up the short block with a reproduction (hydraulic flat-tappet) 351 Cobra Jet cam profile courtesy of Elgin cams. You can use the social sharing buttons to the left, or copy and paste the website link: https://www.diyford.com/ford-351-cleveland-engines-crankshaft-guide/. I get nervous about turning a crankshaft beyond .010-inch undersize; however, crankshafts are stronger than you think. If I am missing something please let me know. The strength of a steel billet crank comes from its onepiece nature and alloy makeup, which has been machined into a crankshaft.
Good Vibrations - Curbside Classic of torque.
May 8, 2023
Notice the huge counterweights and crank snout, which have more machining phases to go.
Very impressed. Estimated International Ship Date:
if ordered today, Engine Rotating Assembly, Cast Crank, Forged Pistons, I-Beam Rods, Ford, Cleveland, Kit, Estimated USA Ship Date:
Hey Frank, I cant speak for Richard Holdener but Clevelands are still my favorite engine to build and your question is a good one. . The 90 degree V8 is made with two different type of crankshaft, the flat-plane and cross-plane: . Stroke, External Balance, Ford, 351C, Each, Crankshaft, 2-Piece Seal, Internal Balance, Forged 4340 Steel, Custom Order, Ford, 351C, Each, Estimated USA Ship Date:
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 .
Run first with the stock 4V intake and mild CJ cam, the Cleveland produced 359 horsepower at 5,700 rpm and 372 ft.-lbs.
Here's why the 2023 Chevrolet Corvette Z06's flat-plane crank V8 is a if ordered today, Crankshafts, Forged-43, 2-piece Seal, Forged 4340 Steel, 3.850 in. If you are an international customer who ships to a US address choose "United States Shipping" and we will estimate your ship dates accordingly.
Also present during testing on the Cleveland was a Meziere electric water pump, MSD distributor and amplifier and a set of 1 7/8-inch Hooker Super Comp headers. 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. Ive seen hundreds of 351C engines raced over the past 40 years without consequence. 4V Ford Cleveland heads NEVER had 4 valves. Stroke, Internal Engine Balance, Forged 4340 Steel, Ford, 351C, Each, Estimated USA Ship Date:
(Photo Courtesy Richard Holdener). When you have significant differences in weight, an engine balancer may have to add Mallory metal, which adds weight to counterweights where necessary. By the way, the 400 was never called the 400M by Ford.
Actually I much prefer the 4V on the street and for great responsive low end power. I believe Marvin used a small-block Ford spider. His specialties is Panteras. Thursday 3/2/2023
If youre rebuilding a Cleveland that already has a steel crank from a prior rebuild, your crank should be nitrided once all machine work and balancing is completed. These stroker cranks are an excellent choice for use in building a high output, light and compact Ford V8 engine powered vehicle. Theres also the harmonic balancer, which acts as a shock absorber for crankshaft twist. I get asked from time to time how to tell the different between a cast and forged crankshaft. Not sure which Ford 351 youve got? K1 Small Block Ford 3.400 Stroke 302 Forged Crankshaft 011DAI340. Most of the better ones use forged pistons, rods and crankshaft that has smaller 2.750, 351C size main bearing journals for longer bearing life. SHARING SOME GOLD. 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. I would have to agree with that statement , if anyone looked at the valve timing on a stock if ordered today, Crankshaft, Ford 351C 4340 Forged Steel Crankshaft ST-4.100 M-2.749 MRL- 6.0 Bal-Ext, Crankshafts, Cast, 2-piece Seal, Cast Steel, 4.000 in.