Carburetor Vs.Electronic Fuel Injection - Tech

Before Installing the throttle bodies, we bolted up the dedicated intake manifold. With eight individual openings designed to feed each port, the manifold offered unrestricted fl ow for each throttle body. Why is there a brass fi tting located at the back of the intake? Check out the next photo.

The 48MM throttle bodies were the highlight of the new Dynatek system. What looked like a Weber IDA carb was actually a sophisticated injection system in disguise. Housed inside the center of each throttle body were the necessary injectors, while the wiring harness ran out the bottom. The injectors were even fed through the original carbureted fuel inlet opening (pretty slick).

This Shot of the bottom side of the prototype intake reveals an interesting feature. The intake featured a common plenum that joined vacuum references from each of the eight intake ports. This vacuum signal from each port (to the map sensor) greatly aides the tuning process of the individual-runner intake.

This Common fuel rail was used to feed each of the four throttle bodies. The TPS sensor located on the driver-side (rear) throttle body and wiring harness for the eight injectors are also evident in the photo. Production intakes will feature a cover plate to all but eliminate the wiring harness from sight.

Run With the new Dynatek Classic Fuel Injection, the peak power numbers jumped from 528 hp and 523 lb-ft of torque to 541 hp and 545 lb-ft of torque. The trick injection system improved the power output throughout the tested rev range and offered gains as high as 35 lb-ft of torque at 3,000 rpm.

RBS Vs. Computers-Dynatek Cfi Vs. Victor Jr./HolleyThe 408 stroker from Coast High Performance was equipped with a hot Voodoo hydraulic roller cam (241/249 duration), a set of AFR 185 heads, and a ported Victor Jr. intake. Run with a Holley 750 HP carburetor, the big-inch Windsor produced 528 hp and 523 lb-ft of torque. After installing the new intake manifold and quartet of throttle bodies that make up the Dynatek Classic Fuel Injection, the peak power numbers jumped to 541 hp and 545 lb-ft of torque. The CFI system from Dynatek not only looked trick, but it also improved the power output throughout the rev range. Torque production was up by as much as 35 lb-ft at 3,000 rpm.

Run With the ported Victor Jr. intake and Holley 750 HP carb, the 408 stroker produced 528 hp and 523 lb-ft of torque. The HP carb from Holley provided a near-perfect air/fuel curve throughout the rev range while timing sweeps indicated the motor ran best with 34 degrees total.