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  • Classic Ford

    PINTO MANIFOLDS

    Jan 21, 2022 4 minutes

    First a recap. In the November 2021 issue I tested three different Pinto 4-2-1 exhaust manifolds: a cheap small-bore; a big bore three-piece; and an all-out, race five-piece manifold on two different spec engines (one just under 140 bhp and a second, higher-revving unit making a little over 150 bhp). There was little difference between them, and I surmised it was because I didn’t have a high-enough spec engine.

    Last week I dyno tested a 2.1 Pinto fitted with a big-valve head, 10.6:1 compression ratio (CR), Kent Cams RL31 camshaft and twin Weber DCOE45s (fitted with 38 mm chokes). The engine was going to be a good 20 bhp up

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