Post Tagged with: "EFI"

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. […]

This is the business end of the Holley HP ECU. The main harness assemblies plug into the two ports on the left (they’re designated J1A and J1B). The main power harness hooks up to the port on the right. The little blue port just left of J1B is the barometric pressure sensor (no hook up is required). (Image/Wayne Scraba)
Product Profiles

Holley HP EFI System Brings Pro Stock & COPO Performance to the Masses

We’ve taken a good look at many of the Holley (and MSD) fuel-injection systems available. They range from the basic, to over-the-top, in terms of function and capability. … You […]

(Image/Wayne Scraba)
How Tos / Tech

How to Set-Up and Tune Holley’s Dominator EFI System (Part 2)

In part one of this two-part segment, we dug into Holley Performance Product’s top-of-the-heap Dominator EFI system. If you recall, we noted how sophisticated this system is and how user friendly […]

The disassembled fuel pressure regulator illustrates its simplicity. The spring can be adjusted externally with a screw and lock nut. Note the small nipple connection on the dome on both the small red version and the larger black Aeromotive regulator. (Image/Jeff Smith)

Ask Away! with Jeff Smith: How to Install a Bypass Fuel Pressure Regulator on an EFI System

I’m building an LS engine to put into an early Chevy pickup and I’ve got a fuel delivery system question. I’m running one of those new Holley Sniper aluminum fabricated […]

(Image/Wayne Scraba)
Tech Articles

How to Set-Up and Tune Holley’s Dominator EFI System (Part 1)

It’s no secret that aftermarket electronic fuel injection (EFI) systems are becoming more and more commonplace. It should come as no surprise however, that some of the early systems were […]

Since fitting an air intake tube and MAF sensor in a retorfitted engine bay is often difficult, many aftermarket EFI conversion kits rely on Speed Density systems. (Image/FiTech)
Tech Articles

EFI 101: Mass Air vs. Speed Density — What They Are & Which is Best for Your Ride

If you’re researching electronic fuel injection (EFI) systems, you’ve probably come across the terms speed density and mass air flow (MAF). These are the two most prevalent types of fuel […]

This is a pre-assembly photo of Holley’s Ultra-Pro fuel line and its specific 90-degre hose end. Note that we’ve already installed the ferrule over the PTFE liner. The instructions say to use a sharp razor knife to trim a small portion of the liner flush with the ferrule and then install the fitting into the socket and tighten. (Image/Jeff Smith)
How Tos

Ask Away! with Jeff Smith: How to Build a Custom Fuel Line for EFI

I’m building an in-tank fuel pump for a fuel injection conversion in a ’69 Nova with a small-block. I have no experience running lines for relatively high pressure injection stuff. […]

There are three vacuum ports on the Sniper throttle body: The large one is for power brakes while the other two are for manifold vacuum or ported vacuum. (Image/Wayne Scraba)
Product Profiles

Holley Sniper EFI System is Easy, Budget-Friendly Path to Fuel Injection

Converting from a carburetor to electronic fuel injection can be both easier and less expensive than some believe, and the Holley EFI unit we’re exploring today is a shining example […]

Here's the photo of D.W.'s in-progress engine build. (Image courtesy of Jeff Smith)
Q&A / Tech Articles

Ask Away! with Jeff Smith: Setup Recommendations for a Supercharged EFI & Nitrous Combo

I am building a 355 cubic inch small-block Chevy with AFR 1065 220cc Race Ready AFR heads, an Erson roller cam, and FiTech fuel injection. Can I use a wet […]

Installing an Edelbrock E-Street EFI system is a smart choice if you daily drive a classic car (Image/Edelbrock)
Parts / Product Profiles / Videos & Galleries

Video: Daily Driving with an Edelbrock E-Street EFI System

Installing an Edelbrock E-Street EFI system is a smart choice if you daily drive a classic car. It delivers excellent all-weather, day-in and day-out reliability—something you might not get easily […]