I have been tuning port injected EFI systems for many years and during that time I have had to replace several throttle body injection systems. So I was somewhat skeptical about FAST's new EZ-EFI which is not only a throttle body injection system, but it was supposed to learn the engine and self tune itself. Nevertheless, throttle body systems are very appealing because you don't have to remove the intake manifold.
One of my potential customers volunteered their 1969 Camaro with a 383 stroker whose fuel system was already plumbed for EFI, meaning a 43 PSI fuel feed, an EFI regulator, and a fuel return line back to the tank. We bolted on the EZ-EFI, entered the engine parameters via the handheld programmer (no laptop is used), and fired up the engine. It started out on the rich side, but after warming up and driving around, the engine tune got better and better as the EZ-EFI zeroed in on the target air fuel ratio. The target air fuel ratio is user adjustable at various engine load conditions. We were done in about an hour with minimal user interaction. There goes my tuning business!
Richard Nedbal
richnedbal@msn.com www.fastmanefi.com