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L78 crate engine

With sales at a steady increase, why change anything? This year did see a taillight revision that created larger lenses with the backup-light lens moved to the middle of the lens assembly. The new egg crate-style grille is an easy way to tell the model apart from those of the previous two years. Just like the previous year, Nova Super Sport sales continued to rise. Under the hood of the Nova was a bevy of options.

While the 90 horsepower cubic-inch four cylinder was available, it was too underpowered, and not a popular choice. Once again, the six-cylinder engine options revolved around the cubic-inch Turbo-Thrift engine delivering horsepower and the cubic-inch Turbo-Thrift engine that delivered an increase of power to horsepower. Introduced inthe cubic-inch engine was still the non-SS base V8 offering, and got you a respectable horsepower.

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Next on the small-block V8 list was the cubic-inch engine. This engine came with multiple horsepower ratings, and in non-SS cars, delivered or horsepower, depending on whether the engine was equipped with a two- or four-barrel carburetor. When the cubic-inch V8 was ordered in a Super Sport, it came with a four-barrel carburetor and an extra five horsepower, giving it This was probably the result of the different air filter housing that was used.

On a sour note, it was the end of an era for Nova fans, as was the last year the cubic-inch V8 was available in the Nova. The first big-block offered horsepower, while the L78 version of the cubic-inch engine, delivered horsepower. The L78 actually displaced cubic-inches this year, and sported a new intake manifold. While it still carried a Holley carburetor, the intake was reconfigured to clear the lower hood lines on other Chevrolet models. The final year of the third-generation Nova was also the final year the cubic-inch big-block was available in the car.

So now that you know what engines were available in the Nova, show us your cars. We want to see what Novas our readers are building, driving, and enjoying! Build your own custom newsletter with the content you love from Chevy Hardcore, directly to your inbox, absolutely FREE!

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Corvette Enthusiasts. Street Rods.When the model-year Chevelle was released, there was very little that changed from the previous year. The tail lights also wrapped around the rear corners of the car, and were squarer as opposed to the long rectangular shape of the previous year.

The Chevelle did have better driving characteristics with the addition of more aggressive tires, and front disc-brakes.

A new model was introduced, the Concours, which was merely a station wagon with wood grain sides. The Deluxe did however, offer different interior colors and more expressive trim. Both were offered as two and four-door sedans, while the Deluxe had the added option of a four-door wagon. The AIR system consisted of the air pump, a fuel mixture-control valve, air manifold tubes, and air injection tubes one per cylinder. Filtered air was drawn through the engine, through the PCV valve, and into the intake manifold.

Inthere were seven available engine choices when ordering the Chevelle. However, there was a new choice for those wanting the six cylinder engine, as buyers could now get the ci version with horsepower.

While the four-barrel equipped ci engine was also dropped, a ci engine was still available, but only with the Rochester two barrel carburetor. With horsepower, the was handily choked in the power department. RPO L30 got you a ci engine with horsepower, or by stepping up to an L79 engine, you got a delivered horsepower. The L79 engine featured larger valves, a compression ratio of Be it good or bad, saw some revisions made to the ci engine lineup. The base ci engine RPO L35still boasted horsepower, and still used a cast-iron intake manifold with a single Quadrajet carburetor.

There are rumors that a Holley carburetor did get placed on some horsepower engines. A depressing announcement for Chevelle fans in was the announcment that the L34 ci engine got a reduction in power output.

To add insult to injury, GM deleted the L78 ci engine from the Chevelle lineup.

l78 crate engine

Both of these changes were a result of a new GM rule governing the horsepower guidelines for all cars except the Corvette. That being said, it has been reported that approximately cars did receive the L78 engine as a dealer-installed option.

In an attempt to meet ever-increasing emissions standards, would also be the first year that the Air Injection Reactor RPO K19 was used on the L78 engine.Chevelle spotting in the s involved a lot of guesswork and speculation. Though the fender emblems read "," the actual, canted-valve Turbo Jet beast under the hood could have been one of three very distinct versions with anywhere between and "rated" horsepower.

This made things risky for would-be stoplight challengers sizing up the SS in the next lane. Though every SS Chevelle featured a power dome hood, rode on an extra-beefy bolt rear axle, and had dual exhaust, those visual tips were of no use in determining if, say, your Magnum, GT, or Tri-power was up to the particular job at hand.

l78 crate engine

Successful contenders learned to close their eyes and. By their distinctive clatter the solid lifters fitted to the top-tier L78 would make themselves known. Lesser and hp s didn't "make the click" since GM fitted them with low-maintenance hydraulic lifters—and lower compression, milder cam timing, Here, a Road Runner or Firebird stood a good chance of victory.

As for the top dog L78, every one came with a hot solid-lifter cam, A virtual twin to the first big-block engine offering in Corvette, where advertising forces nudged output up to hp, the L78 would later share cylinder heads and camshaft with solid-lifter Corvette s and the mighty LS6 Chevelle engine of Lesser muscle simply wasn't in the same league. But looking back, how much power did a stock L78 really make?

All too often, day-two aftermarket bolt-ons obscured their true potency, and plenty of folks credit second timeslips to L78s they'd forgotten were bolstered with such go-faster add-ons as headers, nonstock intake manifolds, and cam swaps. For this story we hooked up with R. Auto Machine in Ludlow, Massachusetts, where a customer's L78 Chevelle engine was being refurbished and then dyno validated.

Let's zoom in and see what made the L78 go tick, tick, tick. Chevrolet Lied! Steve Magnante Author and Photographer. Dyno Results Torque lb-ft HP 2, Share on Facebook Share on Twitter.The Chevrolet big-block engine has undergone a myriad of developmental changes throughout its long life; the cubic-inch version was introduced in the Corvette as the L78 option, along with an appearance in the Z16 Chevelle as the L37 option.

From the factory the engine used a 4. The stock block and crankshaft were machined to Borowski's specs and re-used in this build.

Carter has a numbers-matching Chevelle SS that the engine came from; it will find a home back in that vehicle when its restoration is complete. The story behind the Chevelle, however, is an interesting one. It sat there for almost nineteen years while he was going through this divorce before he sold it to me.

When the car was parked, the engine had been hurt and was out of the car sitting in storage, and when Carter acquired the works, he needed to go through the entire package to return the engine to its former glory. The hydraulic roller camshaft, timing set, and aluminum roller rocker arms are among the valvetrain pieces supplied by Howards Cams.

The camshaft grind used in Calvin Carter's big-block is just one of many that Borowski keeps on the shelf. Borowski's Ken McCaul raves about the performance of the company's camshafts and says they are a big reason why Borowski's engines perform as well as they do. A combination of Clevite main bearings and King connecting rod bearings are used, as in this particular application the Borowski team has found them to perform best.

The stock connecting rods were reconditioned and should provide years of service in this application. A full complement of Howards Cams valvetrain gear is used from the cam to the roller rocker arms and everything in between. Howards 1. Fel-Pro intake gaskets and stock-replacement. The retired Chicago Park District employee and musician he plays drums has started a new endeavor — opening a shop in Blue Island, Illinois, called Mach One Mentoring, to teach youngsters the finer points of vehicle restoration.

Factory cylinder heads are used and have been treated to some mild portwork. Here you can see the Howards roller-rockers in all their glory. On top, an electric-choke Quick Fuel carburetor supplies the octane pump fuel.

The target is not just inner-city kids; Carter tells us that anyone who wants to learn how to restore cars from bumper to bumper will be able to find a home at the mentoring program. Doing something positive for the community—especially one as hard-pressed to find positive role models as Chicago is—shows that Carter and his colleagues are resourceful and have a solid plan.

We can always use more automotive enthusiasts—especially ones that are willing and able to take on the challenging task of restoration. We will safeguard your e-mail and only send content you request. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network.Display Options. Already know the part number you need?

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Vertical Navigation Horizontal Navigation. Remove All Selections. Search Within Results.The standard Chevelle engine RPO L35 was rated at horsepower at rpm and lb-ft of torque at rpm.

The RPO L34 was rated at horsepower at rpm, and lb-ft of torque at rpm.

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Ready for the top-of-the-line? It was an RPO L78, rated horsepower and lb-ft of torque at rpm. ChevelleGuru answered 12 years ago. The L78 was usually rated at HP There were "supposedly" some "listed" as " HP" Only the "rating" on paper changed John answered 11 years ago.

It was possible to get the hp motor option but few were made. The hp motor was "underrated" in chevelles for insurance purposes! The likely output of the L78 motor was in the neighborhood of hp. The car reported mph at 6. Robbie answered 11 years ago.

l78 crate engine

Travis answered 11 years ago. Stephen answered 10 years ago. There were four engine options offered in This was also teamed up with the 3 speed transmission as standard issue, the four speed and automatic were an option. The original '69 brochure for the Chevelle did not list the L78, but the El Camino brochure did. If you had a knowledgeable sales person, he would have been able to order the L78 engine for you in a Chevelle SS.

The other 4th option was the L78 with Aluminum Heads. This was the rarest option. The HP was not rated higher, but the weight was a considerable improvement over the cast iron heads. Both versions of the heads on the L78 were big rect port heads and both the HP and two HP versions had an aluminum intake, which the HP version did not come with. Later in the production year the bore of the changed to ahowever, the car was still called an SSthen the arrived in The Corvette did offer the engine for one year only and it was rated at HP.

This might be the engine that you were refering to, but it was not offered in a Chevelle. NO WAY!! I MEAN Denis answered 7 years ago.The big block Chevy engine is a family of large displacement motors manufactured by General motors beginning in the 's.

Car enthusiasts usually refer to this type of engine as simply "big block" which is meant to differentiate the engine from its smaller cousin, the Chevy small block. Big blocks came in what are known as generation one which included the, and cubic inch versions and generation 2 which contain the,and engines. The Chevy big block engine is popular with hot rodders and street car enthusiasts because of among other reasons one time plentiful availability and the ease of locating aftermarket parts.

Recent listings include: Brand new high volume and pressure oil pump kit from Elgin Industries - Kit includes pump, pickup screen, and hardened intermediate drive shaft. This is a big block Chevy style pump that is designed to fit on big block Chevy engines and provides more pressure than a regular high volume or high pressure pump. May require modifications to the oil pan baffles to fit and longer mounting bolt. Product Features: Quality components made in the U.

Two standard size cranks are included, one is forged steel and the other is cast. The engine block is a standard bore and has been magnafluxed for cracks. The 7 cylinder has some rust pits so block will need to be bored or sleeved. The heads are casting number They have also been cleaned and magnafluxed for cracks. Two intake manifolds are included, one is a factory intake casting with a cast date number B and the other is a Edelbrock Performer aluminum intake.

This set includes eight guide plates for one pair of heads. Big Block Chevy Engine Listings. About the Big Block Chevy Engine Blown Crate Engine.

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