Pontiac Fuel Injection 1957 & 1958

Pontiac fuel injection was a unique, rare option and only ran for two years. Chevrolet and Pontiac were competitive toward meeting the performance demands of the driver. Competition to delivery horsepower was in full throttle.  Though each company had a team of engineers working to design a better mouse trap, the fuel injection system delivered the same result but with a totally different cosmetic appearance.

As you can see in the Pontiac fuel meter assembly, its function is identical to a Chevrolet meter but the form lends to a side entry gear pump mounting flange due to the mounting space constraints underneath the unit. The majority of parts are the same but there are others that are uniquely Pontiac.

Some parts were unique to Pontiac only such as the enclosure tins, the plenums and the distributor itself. Other portions share similar parts like the fuel gear pump, air meter, enrichment housing and many of the mechanistic delivery designs.

So what is the big deal you may ask? Take a walk through some of the photos below to help learn more about the design differences, similarities and cross-bred concepts between Chevrolet and Pontiac.

Since the space constraints were much greater due to the engineers' desire to cosmetically hide the unit underneath the infamous “turkey roaster”, the design led to a bottom-mounted or suspended fuel meter design. A benefit was that it was far less likely for the bowl of fuel to leak down into a cylinder via gravity but from a negative standpoint, the fuel bowl is sitting only inches above the valve push gallery and all of its engine heat. When the spill valve stuck, when the main diaphragm failed or when the float overflowed, it was time to remove the unit. Chevrolet made this much more accessible dependent on the year and bracketry involved. Pontiac by far did present a much more “hidden mystery” beneath the pan.