Q I’ve got a 1300 Crossflow in my Mk1 Escort and I’d like to know if I could put a 1600 head straight on. Is this OK as the valves are bigger, and would it improve performance? I’ve already put a twin-choke 32 Weber on it and four-branch manifold with a free-flow system. Also, what’s the best cam to put in? Graham Hughes Email
A Yes, the head will fit. The one to watch out for is to make sure that it’s a flat head and not a chambered one — where there are combustion chambers let into the head. The Mexico-spec head has slightly bigger valves, so if you can track one down, it’s the one to go for. You’ll see a slight increase in power with this head, but you’ll get more from a cam change. The Kent BCF2 is an excellent fast-road cam, although some people find it makes the 1300 a bit cammy as it’s really designed for the 1600 engine. This is the wildest you’ll want for the road. A 1600GT camshaft would be a milder alternative.
Swapping Crossflow heads? Make sure it’s the flat and not chambered version you;re after.