![]() ![]() They can tolerate more compression than iron heads, making the engine more efficient. We also recommend a set of Trick Flow 23-degree aluminum heads. 421/.451 inches of lift, it’s designed to deliver good low-end torque and gas mileage. Keep the compression ratio around 9.0:1.įor a camshaft, we recommend a COMP Cams hydraulic cam. We suggest using hypereutectic pistons because of their tighter piston-to-cylinder-wall clearances. Start by building the bottom end of the engine, paying close attention to assembly tolerances. What would you recommend?Ī: You used the word right there in the question-“efficient.” Efficient engines operate efficiently, so here’s a tried-and-true recipe for building one. I want to keep it carbureted, if possible. I need a recipe for a fuel-efficient drivetrain combination for this car. Q: I have a 1972 Impala with a tired 350 engine, Turbo Hydra-Matic 350 transmission, and 2.73 rear axle gears. ![]() In this week’s Mailbag, we’re recommending a drivetrain combo to breathe more energy and efficiency into a tired old 350 small block V8 engine. We work with the Summit Racing tech department to help you tackle your auto-related conundrums. ![]()
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