Is a 2.8 camaro motor the same as 86 s15 jimmy?

No, a 2.8L engine in a Camaro and an '86 S15 Jimmy are not the same, although they might share some similarities. While both might be V6 engines of roughly the same displacement, the specific engine codes, internal components, and even mounting points will differ. The application (Camaro vs. Jimmy) requires different configurations for things like accessories and exhaust routing. You cannot directly swap them without significant modifications.