Bolt-on Horsepower: Choosing An Induction System
The induction system feeds the engine air and fuel. So to increase the torque and horsepower output of an engine, the induction system has to provide more air and fuel. That usually means adding an aftermarket performance intake manifold with taller, larger and/or longer runners to increase air flow into the cylinder head ports, bolting
Understanding Port Swirl In Diesel Engines
What is port swirl? Actually this is a little contradictive. The port doesn’t actually swirl, it is the design of the port that causes air to swirl! Swirl is what is taking place when the intake charge exits the intake valve and enters the combustion chamber. As the air enters the combustion chamber and the
Building a Late Model Hemi Stroker
What is the purpose of stroking a motor? The answer is simple: to obtain more cubic inches. And in today’s economic times, it’s always best to achieve “more” with less – as in less money. The key word to many stroker enthusiasts today is “budget”. However, the word “budget” has a way of being interpreted
Selling Vintage Speed Can Help Business Until Business Gets Better
Due to these hard times, fewer customers are looking for your services, and they’re looking to spend as little money as possible. A small shop can survive on low-margin jobs for only so long before the overhead simply eats you alive. One alternative plan is to add a line of vintage performance engines that command
Pre-War Engines: Vintage Technology, Modern Products
How have the changes in the market and the changes in vehicles affected shops specializing in vintage engines as well as those shops thinking about adding vintage to their list of services? The automotive enthusiast and collector market is a funny creature. While the actual mechanical evolution may sometimes run in opposite directions, the eras
Street Performance Cylinder Heads
Where I grew up in Connecticut wasn’t the hotbed of street racing like Woodward was in Detroit, but we had the Berlin Turnpike, River Road in Middletown, plus a few local small-town hotspots. It was during this period that I got my first education about the importance of cylinder heads. A local rich kid got
Scoping Out the Sport Compact Market
At first it was known as the Import Tuner Market which later morphed into what is currently known as Sport Compact. However, the market could be changing again and may soon be called something else. Last year, the Specialty Equipment Market Association (SEMA) changed the name of its Sport Compact Council to Street Performance Council
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
SSSSSnake Bit!
In 1974, America watched 93 cars get destroyed in a 34-minute car chase. “Gone In 60 Seconds,” an independent film written, produced and directed by and starring Toby Halicki was an otherwise forgettable ’70s movie. The plot revolved around Mandrian Pace (Halicki) and his car thief cronies and 48 cars that they needed to steal
Performance Carburetors
Carburetors persist because they are relatively simple and inexpensive compared to electronic fuel injection (EFI). Most racers and hot rodders are familiar with carburetors and know something about how to install, tune and adjust a carburetor. They may not always do it right, but all they usually need is a screwdriver and a wrench. They
EFI Introduction 101
EFI has become the tool that has unlocked the next level of engine performance. Nowhere is it more evident than in drag racing, where EFI has taken over where the rules permit. Take Joe Dunn’s Pat Musi-powered ’68 Camaro that just rocked the competition with a 6.38 @ 218 mph pass. Its 755 cid big-block
Crankshaft Balancing
The first step in understanding crankshaft balancing is to understand the purpose of the counterweights. The counterweights are designed to offset the weight of the rod and pistons. You have the weight of the crankshaft and the pistons and rods. At any point in the assembly’s rotation, the sum of all of the forces are
Flat or Tapered Cams and Flat or Crowned Lifters
It never occurred to me to even ASK whether the cam I recently had re-ground for a Buick Nailhead engine was ground with flat or tapered lobes. Like a great many others, I’d forgotten that some vintage engines had flat lobe surfaces because I’d gotten so used to everything having tapered lobes. This, unfortunately, can
Survival Motorsports Shop Profile
When he first started Survival Motorsports, Barry Rabotnick hoped tosell parts, primarily for Ford FE motors. “My goal was to become thesingle-point supplier for the FE Ford enthusiast.” TheFE, says Rabotnick, offers significant advantages to the right user.“The builds I’m doing on the FE might not be the same as people aredoing with another engine
Piston Options and Opportunities
The sport compact market, it was thought, was going to breathe new life into the performance engine market, and for many years, the rapid growth of the market seemed to indicate that there was no limit to how big those little engines could get. Then something happened: to quote Engine Builder columnist and performance expert
Engine Builder Shop Solutions: January 2009
Top 10 Machine Shop Business Tips Engine Pro recently held a series of 8 focus-group meetings in the Midwest. Each meeting consisted of 8 to 10 machine shop owners and a moderator. Three questions were asked during the meeting. “What’s working? What’s not working? What do you need most to help you ‘make it’ for
Up-Selling in a Down Market
Do you ever wonder what’s next? First gas prices climb to more than $4.50 per gallon and everyone is dumping their gas-guzzlers. A couple of months later gas free-falls to $1.50 a gallon, but no one cares because people are being laid off in record numbers. Our major investment banks go bust, the credit system
Takin’ it to the Streets: Performance Valvetrains for [almost] Everyday Use
Even though the valvetain plays a supporting role in the overall performance potential of an engine it can still be a make or – frequently – break proposition for engine builders. In a street performance application in particular your customers are usually quite proud of their vehicles and spend a lot of money on appearance.
Kicking Asphalt
In this election year it somehow seems appropriate to talk about a movement that reaches the common citizen…the working man…the small-business person. Political rhetoric aside, it has the potential to gain traction in the industry and showcase what’s great about America – grassroots road racing. There are no multi-million dollar sponsorships (multi-million dollar wallets not
Get Ready For The Perfect Storm
Prior to $5 per gallon gas many of us wouldn’t have given the sport compact market a second thought. After 13 years of meteoric growth, the high performance sport compact market stalled, nosed over, and settled into a holding pattern. The Fast & Furious crowd just lost interest. The huge sport compact enthusiast books suffered