Slang term for a Wankel Rotary engine, which is an internal combustion design originally used by NSU and later licensed to Mazda, who still uses it today in the RX-8. Dorito Spinner refers to the shape of the rotor being roughly Dorito-like.
"Sweet RX-7! How's the Dorito Spinner?"
"Dorito Spinners? Well, yeah, Communism worked in theory too."
"Oh yeah, Dorito Spinners! Boost goes in, apex seals come out."