 He was to design and build the new 3-litre engines for Brabham, the result being two drivers championships and two constructors championships in 1966 and 1967.Later, Brabham switched again to Ford DFV engines built by Cosworth, and once again, Judd was hired by Jack Brabham to do developmental work on the Cosworth DFV engines.The Brabham team later sold to Bernie Ecclestone, and Jack Brabham planned to create a new project in engine development.