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Car Industry Information and Gossip + Racing + Automotive History + tech + Shop Lore + Hot Rods + Collector Cars + regular

Cammer: the Story that is real of Legendary Ford 427 SOHC V8

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Into the 1960s, Ford’s overhead-cam 427 V8, popularly referred to as Cammer, became the material of misconception and legend. Here’s the story behind the storyline.

Right right right Here in 2014, overhead-cam, multi-valve machines would be the industry standard. Anything less is known as retrograde. But from the United states scene that is automotive of 1960s, pushrod V8s had been the up to date. Into this easier, more innocent world stepped Ford’s 427 CID SOHC V8, which quickly became referred to as Cammer. Right now, a effective mystique surrounds the motor. Let’s dig set for a better appearance.

The very first mention that is public of Cammer V8 appeared in the Daytona Beach Morning Journal on Feb. 23, 1964.

Beaten up at Daytona all month by the brand new 426 Hemi machines from the Dodge/Plymouth camp, Ford officials asked NASCAR to approve an overhead-cam V8 the business had when you look at the works. But once the Journal reports right here, NASCAR boss Bill France turned thumbs straight down on Ford’s proposed motor. France regarded overhead cams and such become European exotica, a bad fit along with his down-home vision for Grand National stock vehicle race.

Despite the fact that France barred the SOHC V8 from NASCAR competition, Ford proceeded to anyway develop the engine, hoping to change Big Bill’s head. In May of 1964, a ’64 Galaxie hardtop by having a Cammer V8 installed was parked behind Gasoline Alley in the Indianapolis engine Speedway, in which the assembled press corps might get a good consider it. Here’s Ray Brock, publisher of Hot Rod magazine, eyeballing the setup. Note the spark plug location in the edge that is bottom of valve address about this very very early form of the SOHC V8.

Here’s another very early picture of the Cammer using the spark plug location that is original. Ford designers took great problems to create a perfectly symmetrical combustion that is hemispherical with an optimized spark plug location, and then realize that the spark plug didn’t actually care. The plugs had been then relocated towards the top of the chamber for ease of access. This motor is established for NASCAR usage: Note the cowl induction airbox, the carburetor that is single therefore the cast exhaust manifolds.

The engine was simply a two-valve, single-overhead-cam conversion of Ford’s existing 427 FE V8, and a quick and cheap one at that despite the Cammer’s exotic cachet, in reality. In the business, the Cammer had been referred to as “90 time wonder,” a low-investment synchronous task towards the costly DOHC Indy motor in line with the Ford small-block V8. The heads were cast iron and the cam drive was a roller chain to save time and money on the conversion. The oiling system had been revised also to manage the greater horizontal inertia loads produced by the increased rpm, cross-bolted primary caps had been integrated in to the block casting. These features had been then used on all 427 CID machines throughout the board.

This is simply not a SOHC Ford V8 but a 331 CID early Chrysler Hemi, shown right right here to illustrate a significant attraction of this SOHC design among Ford designers. By putting the camshafts atop the cylinder minds, the pushrods could possibly be eradicated completely, allowing larger, straighter intake take a look at the site here ports.

One Cammer function that will continue to fascinate gearheads today may be the timing chain—it had been almost seven legs very long. Economical and quicker to build up compared to a appropriate gear drive however almost as effective, the string introduced a number of dilemmas. For instance, racers within the industry soon discovered that it had been essential to stagger the cam timing four to eight levels between banking institutions to pay for slack within the links.

This closeup illustrates the revised spark plug location and another problem developed by the string drive. The cam rotates toward the intake follower, and away from the follower on the opposite bank since the chain drives both cams in the same direction, on one bank. This in turn necessitated an unique camshaft for each bank, one a mirror associated with other, and so the opening and closing ramps is precisely found.

Here’s a glamour shot associated with the complete Cammer from the community of Automotive Engineers paper (SAE 650497) presented by Norm Faustyn and Joe Eastman, Ford’s two lead designers on the task. Most of the published technical sources regarding the Cammer, including an in-depth feature in the January 1965 problem of Hot Rod Magazine, be seemingly closely on the basis of the SAE paper.

On October 19, 1964, NASCAR relocated to ban all racing that is“special,” in its terms, eliminating both the Cammer Ford plus the Chrysler 426 Hemi from Grand nationwide competition for 1965. Chrysler responded by temporarily withdrawing from NASCAR, while Ford proceeded on featuring its traditional 427 pushrod engine in NASCAR and took the SOHC engine towards the drag strips.

Cammers had been first utilized in the couple of factory-backed ’65 Mustangs and ’65 Mercury Comets race within the NHRA Factory Experimental classes and somewhere else. Shown this can be a installation in Dyno Don Nicholson’s Comet. Within the ’65 period, Nicholson experimented with Weber carbohydrates and Hilborn fuel injection setups, combined with the twin Holley four-barrels pictured. On gas, the engine ended up being considered great for 600 hp.

Despite hefty lobbying from Ford, in December of 1965 NASCAR again banned the Cammer for 1966, with USAC piling on (Spartanburg Herald-Journal, December 18, 1965 above). Nonetheless, in April of 1966 NASCAR finally relented. Type of. Okay, not. The Cammer had been now permitted, technically, but only into the full-size Galaxie model, restricted to one tiny carb that is four-barrel in accordance with a ridiculous, crippling fat handicap: almost 4400 pounds, 430 pounds significantly more than the Dodge and Plymouth hemis. At that point Ford stated no many many thanks and devoted the Cammer to drag race. The motor never ever switched a lap in NASCAR competition.

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