HEAD VERSUS CARBS

What should you upgrade to next — a big-valve cylinder head or DCOE carbs? Graham pits both against each other on a 1700 Crossflow.

This month we are looking at a couple of upgrade options on a Crossflow engine. The engine in question has the usual + 0.090 1300 pistons making it just under 1700cc and a Kent Cams BCF2 camshaft. It’s fitted with a stock Mexico cylinder head breathing through a Ford intake manifold fitted with a 32/36 DGV Weber. The exhaust manifold is the widely-copied Janspeed 4-2-1 design that first appeared in the early 1970s and is still hard to beat on a road engine. Set up on our in-house Superflow engine dyno engine the engine produced a respectable 108 bhp @5800 rpm and 108 lb.ft @4200 rpm. By way of reference, a stock 1600 Mexico/Sport/GT makes about 84 bhp. With the bottom end being typical of tens of thousands of Crossflows…

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Classic Ford (Digital) - 1 Issue, January 2024

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