What’s Rockin’ In Performance Rocker Arms and Valve Springs
Horsepower is in the heads. But for a cylinder head to breathe efficiently, the valvetrain must be rigid and strong to minimize flex, but also lightweight. For most performance applications, that means replacing the stock rocker arms, valve springs and pushrods with some type of aftermarket roller rocker arms, stiffer valve springs and stronger pushrods.
Manufacturer Tech Tip: How Do You Clean Your Aluminum Intake Manifold?
Edelbrock intake manifolds are manufactured from a sand cast process utilizing 808 aluminum alloy and have an as-cast wheel-a-brated finish. As-cast is defined as a raw aluminum finish without any protective coating. As-cast aluminum is porous and can absorb under-hood chemicals such as dirt, grease and fuel, resulting in discoloration, rust, or staining. All Edelbrock
Fueling the Need for Performance Fuel Systems
Consider this – a high 10 second drag car will burn up one gallon of gasoline in 25 seconds or less, but a car that can run a 7 second E.T. will burn the same amount of fuel in half the time. The physics involved with fuel flow to create horsepower is difficult for even
Carburetor Tuning: A/F Mixture, Air/Fuel Equation
Now that the ignition spark timing advance curves are optimized for the blend of reformulated and/or oxygenated gasoline your customers are using we will now show you how we use tools such as a 5-gas exhaust analyzer and wideband Lambda air/fuel (A/F) meter to tune the mixture. The Air/Fuel Mixture A lean fuel mixture can
Alex Xydias Presented Robert E. Petersen Lifetime Achievement Award
Alex Xydias, founder of the So-Cal Speed Shop, was given the Robert E. Petersen Lifetime Achievement Award at the recent Hot Rod & Restoration Trade Show held in the Indiana Convention Center. The annual award recognizes contributions to the business and hobby of hot rodding and restoration, Xydias is the seventh person to receive the
Intake Manifolds, Fuel Injected Engines, Carburetors
An intake manifold is more than the plumbing that connects the carburetor or throttle body to the ports in the cylinder head. It is an integral part of the induction system that has to match the airflow characteristics of the cylinder head and camshaft, as well as the displacement and rpm range of the engine.
Drag Racing Cylinder Head Selection
Experts say that the key ingredient is high velocity matched with good flow. But the high flow numbers may blind your customers from seeing the whole picture, so it is up to you to explain. Some cylinder head experts compare flow numbers to horsepower numbers on a dyno – but guess what? They’re not all
Stroker Engine Kits
For more than 50 years the old saying “There’s no substitute for cubic inches” has been the credo of nearly every racer and hot rodder. Whoever created this unwritten universal law could never have imagined to what extremes today’s speed enthusiasts would take it. Now, unless you have a 420cid-plus small-block or a 550cid-plus big-block
AETC Review
The 17th Annual Advanced Engine Technology Conference (AETC) was held for the second year in a row at the Orlando Convention Center, Dec. 11-13, just days before the opening of PRI. While the weather wasn’t frightful, there wasn’t quite as much Florida sunshine as the previous year either, but the talk around each morning’s breakfast
Performance Valves
The power that an engine produces depends to a large extent on how much air it flows. The larger the engine’s displacement in cubic inches, the more air it pumps with every stroke and the more horsepower it makes. Rpms also make power. In theory, doubling the engine’s speed doubles its power output. Rev an
High Performance Rocker Arms, Valve Springs, Retainers and Locks
On a small block Chevy, altering the rocker arm geometry without changing the rocker arm lift ratio can add 15 to 20 horsepower at the rear wheels. The stock lift ratio for a small block (SB) Chevy V8 rocker arm is 1.5:1, and for a big block (BB) Chevy V8, the ratio is 1.7:1. Bolt-on
Coretalk: House Approves Bill To Increase Ethanol Fueling Pumps At Gas Stations
At this time, only 800 gas stations have E-85 pumps installed, less than one percent of all gas stations. Automakers incur about $20 million in CAFE fines annually. Supporters hope this money could double the number of pumps available to dispense ethanol or other alternative fuel. The bill would provide grants of between $30,000 and
Performance Drag Racing Heads
A quarter-mile strip of asphalt is not a great distance. But drag racing isn’t about distance. It’s about time. The car that reaches the finish line first wins the race. But the car that wins isn’t always the fastest car or the quickest car. It’s usually the car that runs with the most consistent elapsed
Performance Notes, How To Compete With The Crate Motor Business
If you are a regular reader of the performance automotive consumer magazines you may have spotted a trend – many of the feature cars and tech articles are focused on crate motors. To an engine builder specializing in custom high performance engines, and for engine builders looking to get into the performance arena, this could
Coretalk: Cummins, Scania Joint Venture To Produce Next-Generation Fuel Systems
Cummins-Scania XPI Manufacturing LLP is a 50/50 joint venture, which builds on Cummins-Scania partnerships in fuel systems development and manufacturing that date to January 1992. The two companies currently produce the HPI fuel system, which eventually will be replaced by the XPI (Xtra-High Pressure Injection) system. The XPI common rail fuel system is expected to
Coretalk: AERA EXPO 2005 Set For Las Vegas Hilton In April
The EXPO will showcase leading edge technology with live, operating demonstrations of equipment, tools, supplies, parts and services. Exhibits will be open on Thursday, April 28, from 10:30 am-6 pm; Friday, April 29, from 10:30 am- 6:30 pm; and Saturday, April 30, from 10:30 am- 2:30 pm. EXPO will include a keynote address from NASCAR
Big-Inch Cadillac’s
While some engines are relatively rare in machine shops, the big Cadillacs have remained a consistent source of income. These engines are Cadillac’s last big hurrah at traditional big-cube, flagship GM engines. Surprisingly, they are also a scaled-down version of a V-12 engine that made it through early production and road-testing before being scrapped as
Performance Marine Engines – Meeting Customer Expectations
Life is a series of compromises. Human relations almost alwaysinvolves compromises of some sort. You want Chinese for dinner,she wants Italian; something has to give. Even if you go yourseparate ways, it’s a compromise and a decision to not dine together. Believe it or not, it’s the same with machinery. Any exercisein design is a
Making A Big Splash In The Marine Market
The average individual that would have owned a performance car in the 1960s, and the baby boomers that did, in many cases no longer have a modern affordable toy they can tweak to their own satisfaction. Serious performance today is often available to only a few with large checking accounts or extra good credit, and