Quote Originally Posted by 4dnut View Post
Hi I run the Zakspeed Mk1 replica, i am desperately trying to get it going for the festival. Just had to take the engine out again to fix a small issue. Hopefully get it back in tomorrow after work. As for the question on YB engines, it can be a bit grey. What actually is a YB. Is it the turbo engine built by Ford/Cosworth or a you talking about something else. Some of the engines running were not built by Ford or Cosworth they are modern Smith and Jones engines. A S & J engine started as a YB but ended up taller and made of aluminium and with there own cylinder head.
Exactly, so either way the engine and its derivatives were never available for homologation in the 1968 - 1974 Mk 1 Escort. Therefore a car so fitted will never comply with schedule K and if running in age grouped classes should be running in the period of the engine, ie at least post 1986.