Browse Publications Technical Papers 841225
1984-09-01

The GM 4.3 Liter V-6 Gasoline Engine 841225

Two new 4.3 liter engines with 90° V-6 configurations were developed for use in Chevrolet's 1985 light duty trucks and rear wheel drive passenger cars. The new engines were optimized from the standpoint of oil sealing, performance, and fuel economy.
A four-barrel quadrajet carburetor mounted on an open inlet plenum is used for truck applications and a 1×2 throttle body injection system mounted on a similar open inlet plenum is used for passenger car applications. Both engines are designed for optimum engine breathing and cylinder charging, and each requires a specific engine/emission control system.
These engines are configured for even firing, have swirl inlet ports, and fast burn combustion chambers. The results obtained through the extensive engineering development program met and/or exceeded the program goals for performance, oil and coolant sealing, and fuel economy.

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