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Turbo John Racing Uncategorized 409ci SBC is Blown Up! How to do cranking compression test / Pumping the motor

409ci SBC is Blown Up! How to do cranking compression test / Pumping the motor




SBC may be hurt! But let’s see how bad it is. This thing is currently running and driving, but we know it has some extra thrust clearance. But if you notice when it’s cranking over, there is a cylinder or two that seem a little low on compression. Let’s do a cranking compression test to see if the heads also need to come off. This engine has been together for 1 year, and boy have we ran it hard in that year so I cannot be mad at it at all. It’s racing, build, race, break, repeat!

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