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Restoring a series3 with a racing engine?

Discussion in 'Rootes Racing' started by Knightowl61, May 3, 2022.

  1. Knightowl61

    Knightowl61 Gold Level Sponsor

    A long story - back in the early '70s I put an overdrive transmission from a Hillman into my series 2, shortly afterwards the main shaft broke and I never found another overdrive main shaft. In the mid 80s (early internet) I found a guy that wanted the overdrive unit and we traded for a 1725 engine. He said the engine was built for racing but I never pursued that fact. I eventually put a Toyota engine and 5 speed overdrive in the series 2 and am now restoring a series 3.
    I finally looked at that racing engine after sitting over 35 years and yes it is built for racing.
    I would like more power but a smooth running drivable engine. I don't know how this engine would work as a "driver" car and not a race car. I'm new to the race forum and would like input as to what I should do. Will I have too much compression with the pictured parts and the engine loping and getting power only at high RPM's? The head has the vizard modification but is shaved close to the depth marks.
    cam end.jpg cam side.jpg piston inside compare.jpg piston inside.jpg piston top.jpg rod compare.jpg

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