Valvetrain
Selecting the right components to make a rock-solid valvetrain is key to assembling an engine that will last – and win. The pushrods, rockers and valve springs must be able to handle all of the stresses of the camshaft rotating with high spring pressures and with huge lift. Weakness in any part of the system
Matching Pistons And Rings
Whether you are rebuilding a high-mileage engine or building a fresh engine from scratch, matching the pistons and rings to each other and the application is essential for a successful outcome. Rings are a wear component that are usually replaced during a rebuild. The pistons may be reused if they are not damaged, cracked or
Racing Rocker Arm Technology
The rocker arms play a more important role than ever these days in high performance valvetrains. The rockers are the teeter-totters that translate the upward motion of the lifters and pushrods to the downward motion that opens the valves. It seems like a relatively simple task, but it demands the utmost from the design of
Performance Icon Carroll Shelby Dies at 89
In the 1960s, Shelby raised the profile of American racing machines on the international sports-car circuit by packing powerful Ford V-8 engines into lightweight British roadsters, and by developing racing cars for Ford. His Shelby Cobras proved worthy competitors to the likes of Ferrari, Maserati and Jaguar and became prized collector’s items – today they
Choosing Valvetrain Components: Lifters, Pushrods, Springs & Rockers
The type of parts you ultimately choose will depend on the application (street performance, circle track, drag, marine, etc.) and any rules that restrict the type of camshaft, lifters or other valvetrain components that are allowed. But don’t overlook your customer’s budget. Affordability often limits your choices if a customer just doesn’t have the bucks
Engine Balancing: Old School Experience Meets New Technology
The one fact that has held true from the first engine built till today is you must have balance to hold things together and not vibrate apart. I am a Performance Engine Technology Instructor at Daytona State College, therefore I must give you a short applied physics lesson first. The force of a rotating object
Recent Advancements in Racing Oils
The racing oil community has been very busy this past year. This is much more satisfying to an old “oilhead” who has seen years where there were no new racing oil developments. Racers and engine builders traditionally focus more on improvements in hard parts, because that’s what they understand best. However, recent successes in racing
Cam Drives and Timing Components
Cam timing plays a huge role in an engine’s power curve. Advancing cam timing shifts the power curve more toward the lower rpm range, while retarding it moves the power curve higher up the rpm scale. If an engine is being built for a particular application (stock, street/strip, drag race, circle track, you-name-it), how the
Pro Stock Engine Technology
For a gearhead it’s always interesting to look at the upper echelons of motorsports to see what’s ticking under the hood. F1, Sprint Cup, and endurance cars are all fairly engaging from an engine perspective, but nothing tops drag racing for its sheer power, variety and ingenuity. In a single event you have vehicles competing
Performance Lifters, Pushrods and Valve Springs
Low friction roller lifters replaced flat tappet lifters many years ago in stock production engines, but there are still plenty of hot flat tappet cams bumping the valves open in vintage muscle cars, street rods and race cars. Even NASCAR is still using flat tappet cams to actuate the valves. The advantage of flat tappet
Dyno Decisions Depend on Business Model
If you need a dyno only three or four times a year, you’re probably better off renting dyno time from another facility. If you build race engines for a living, an engine dyno is an essential part of how you do your job and ultimately the value you provide to your customer. So what are
Selecting The Right High Performance Rocker Arms
The rocker arms in a pushrod engine serve two purposes. The rockers serve as fulcrums to redirect the upward motion of the lifters and pushrods into downward motion to open the valves. The lift ratio of the rockers also serves to multiply the amount of valve lift generated by the cam lobes. Stock rocker arms
Can Diesel Performance Help Boost Your Business?
Most people associate diesel engines with truck and tractor pulling events, not traditional motorsports. There are no diesel-powered NASCAR races or Indy cars. But diesels are making inroads in other types of racing. Diesel-powered race cars and trucks are setting land speed records at Bonneville, winning endurance races at LeMans, and running over 200 mph
Diesel Performance: Camshafts, Lifters and Valvetrain
Diesel performance is nothing new. What is new is the level of interest in diesels for all kinds of racing; everything from traditional truck and tractor pulling to drag racing, even sports car and endurance racing. Diesel engines are a different type of animal when compared to gasoline engines. While both use the same four-stroke
A Chip Off The Old Block: Aftermarket Blocks Are More Versatile Than Ever
It’s the same economic principle many body shops use on their rodding customers. You can expend good time, money and effort trying to resurrect an old hulk towards the customer’s ultimate goals or you can cut to the chase by starting with an accurate reproduction. In engine building, the same holds true but with a
Boosting Performance – Nitrous, Superchargers and Turbochargers
From the budget six-cylinders that get 300 hp and 28 mpg for less than $25,000 to the 600 hp Viper V10 to the 630 hp Corvette ZR1 for just over $100,000, the performance market is deep and wide. “It’s amazing, the horsepower potential that these cars are coming with off the factory floor,” says Frank
Performance Rocker Arm & Shaft Systems – Time-Tested Technology Provides Proven Performance
The SB Chevy ball and stud stamped steel rocker arms were a revolutionary departure from the shaft mounted rocker arm systems of that era because they allowed it to outrev its competitors. More revs means more airflow and more power. It wasn’t until 1962 that Ford finally dumped their old Y-block 312 rocker shaft engine
Mysterious Processes, Proven Results
While cryogenics – the technology for producing and using cold in a variety of ways – saw significant achievements in technology and applications in the latter half of the twentieth century?(and continuing, of course, today), scientists have been developing ways to make things colder and colder since the late 1800s. The successful process of liquifying
Building to Race, Racing to Win
Building championship-caliber engines isn’t a new concept to Jeff Williams. Since he started building his first stroker 302 Ford at age 14, the West Texas native/Southern California transplant has been looking for ways to go faster than his competition. These days, that’s often a very challenging assignment. But more on THAT in a minute. “I’ve
Engine Part Coatings: Is Beauty Only Skin Deep?
Outside of the engine building community, people think of coatings and think of something dipped in chocolate and rolled in candy. For us it’s a little different, especially with engine coatings – even though it may be candy to your engine parts business. So let’s just clear this up right now: there is no caramel,