Fuel Injected Small Block - Flexing A Stiff Arm

Building An EFI 406 For The Everyday Drag

Mike Petralia Jun 1, 2003 0 Comment(s)
Sucp_0306_04_z Fuel_injected_small_block Cylinder_heads 2/11

The Air Flow Research 210cc CNC cylinder heads were polished before assembly. A Moroso stud girdle ties all the Harland Sharp 1.6:1 rocker arms together for stiffness.

More Power
With the high torque testing out of the way, Lirones wanted to give the engine an extra boost in power but didn't want to sacrifice too much of its peak torque. They were, however, willing to move the torque peak up in the powerband, in order to make more top-end horsepower. Lirones swapped on Arizona Speed & Marine's modified Dart single-plane intake manifold with larger 36-lb-hr injectors and a 1,000-cfm four-bbl-type throttle body. Since the TPI system was controlled by the still effective, yet older ACCEL Gen VI ECU, Westech suggested that the new EFI system might be a bit more tunable using a new F.A.S.T. ECU.

With the new manifold, injectors, and throttle body bolted on and the F.A.S.T. ECU plugged in this new package was worth a huge gain in top-end power. And all that peak torque that really brought the 406 to life was not sacrificed that much. After all testing was completed, it wasn't hard for the engine's owner to choose the more powerful F.A.S.T. ECU/single-four barrel EFI system because he likes power. But we wanted to show you both systems' test results because it turned out that the TPI setup would make a killer everyday street motor.

Sucp_0306_05_z Fuel_injected_small_block Roller_lifter 3/11

Cams has developed its Endur-X solid roller lifter line for everyday street use. This oil groove machined into the lifter body provides pressurized oil to the cam lobes, which is critical, especially at low engine speeds.

Sucp_0306_06_z Fuel_injected_small_block Crank 4/11

The bottom end has to be strong to survive, and Lirones spared nothing here. The Cola crank and Oliver rods ensure ultimate reliability while the four-bolt GMPP Bow-Tie block ties it all together for the best rigidity.


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