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Pontiac 326 V8 Engine

In 1963 Pontiac continued with its tradition of making new engines out of old engines and decided to reduce the bore of the popular 389 motor in order to make the 326. The Pontiac 326 was produced as a replacement engine for the Tempest since these earlier cars had the all aluminum Pontiac 215 engines in them that were produced by Buick. The stroke in the 326 was not changed at all and the compression was kept much higher than many of the lower end 2 barrel 389 motors. This gave the standard Pontiac 326 up to 50 more horsepower than many of the low compression 389 engines coming off the assembly line.

By 1964 a high output 326 was introduced that included a 4 barrel carburetor and gave the engine a respectable 280 horsepower rating. The Pontiac 326 also had the special honor of being installed in some of the first Firebirds for 1967. After 1967 this engine was taken out of production. It is still possible to find parts for the 326 engine but donít expect an ample amount due to the fact that this engine never really caught on with performance enthusiast.

 

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Engine Specifications

1963 with 2 Barrel Carb
Max Brake Horsepower - 260 @ 4800 rpm
Max Torque - 352 @ 2800 rpm
Stroke - 3.750
Bore - 3.71875
Compression - 10.25
Firing Order - 18436572

1964 with 2 Barrel Carb
Engine Code - 92x,96-0

Max Brake Horsepower - 250 @ 4600 rpm
Max Torque - 333 @ 2800 rpm
Stroke - 3.750
Bore - 3.71875
Compression - 8.6
Firing Order - 18436572

1964 with 4 Barrel Carb
(High Output Model)
Engine Code - 94x,97-0

Max Brake Horsepower - 280 @ 4800 rpm
Max Torque - 355 @ 3200 rpm
Stroke - 3.750
Bore - 3.71875
Compression - 10.5
Firing Order - 18436572

1965 - 1967 with 2 Barrel Carb
Engine Code - WP,ZN(1965) - WP,WX,YN,XF(1966)
- WP,WX,WC,WH,YO,YN,XF,YJ,XI (1967)

Max Brake Horsepower - 250 @ 4600 rpm
Max Torque - 333 @ 2800 rpm
Stroke - 3.750
Bore - 3.71875
Compression - 9.2
Firing Order - 18436572

1965 - 1967 with 4 Barrel Carb
(High Output Model)
Engine Code - WR,YP(1965) - WR,YP,XG(1966)
- WR,XR,WK,WD,YP,XG,YM,XO (1967)

Max Brake Horsepower - 285 @ 5000 rpm
Max Torque - 359 @ 3200 rpm
Stroke - 3.750
Bore - 3.71875
Compression - 10.5
Firing Order - 18436572