Formula Super Vee

Formula Super Vee was an open-wheel racing series that took place in Europe and the United States from 1970 to 1990. The formula was created as an extension of Formula Vee, a racing class that was introduced in 1959. Formula Super Vee in Europe was similar to F3 or Formula Renault today, a stepping stone to F1. In the United States, Formula Super Vee, often referred to as Super Vee, was a natural progression to Indy Car and Can-Am. On both sides of the Atlantic the series also was a platform for the promotion of VW products, similar to how Formula Renault promotes Renault products today.[1][2][3]

Initially it was seen as a simple step up from Formula Vee, using the same type 3 air-cooled VW engines, but in 1600cc. However it soon transformed to using the very different and more powerful fuel injected water-cooled engines from the VW Golf/Rabbit.

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https://en.wikipedia.org/wiki/Formula_Super_Vee