Articles written by: Stephen Kim

According to Comp Cams, although variable valve timing systems in OHV motors work extremely well, a DOHC motor offers hp and torque gains that are 25-50 percent greater than in a pushrod motor. The ability to phase the intake and exhaust lobes independently is a great calibration tool that’s only limited by a calibrator’s knowledge of how valve events impact airflow dynamics. (Image/Stephen Kim)
Tech Articles

Calibrating for the Future: Conquering the New Frontier of EFI Tuning with SAM Tech’s Jason Haynes

EFI tuning, as we know it, is over. Stick a multimeter probe in it. Gone are the days of simply setting the fuel and timing maps, then calling it good. […]

Pump Guide: A Look at Quick Fuel’s Mechanical and Electric Fuel Pumps — and Which is Right for You
Tech / Tech Articles

Pump Guide: A Look at Quick Fuel’s Mechanical and Electric Fuel Pumps — and Which is Right for You

In simpler times, carburetors relied on mechanical fuel pumps, and EFI engines required high-pressure electric pumps. Things aren’t so simple anymore because times have definitely changed. Even the most beastly […]

Cast System: An Inside Look at Edelbrock’s Foundry and Casting Techniques
Tech / Tech Articles

Cast System: An Inside Look at Edelbrock’s Foundry and Casting Techniques

  Running 6.80s at nearly 210 miles-per-hour, today’s 275mm drag radial door-slammers incinerate the quarter-mile thanks to obscene levels of airflow and grip. Producing close to six horsepower per cubic-inch […]

With a stream of Renegade 116-octane fuel running through the rails, the COPO LS7 performs best on 31 degrees of timing. SAM Tech varies the air/fuel ratio between 12.7:1 and 13.2:1 depending on the level of competition on a given race weekend. A Holley Dominator EFI system is tasked with engine management duties.
Tech / Tech Articles / Tech Projects

Stock Eliminator LS7: How SAM Tech Got 825 Horses from a Naturally Aspirated, NHRA-Legal LS7

Anyone can slap a supercharger on a stock 505-horse LS7 and pick up an extra 200 horsepower. And thanks to the incredible untapped potential of GM’s factory LS7 cylinder heads, gaining huge […]