![]() ![]() Running take out big cam engines are available for pretty cheap, less than 4k. Maybe the cam has a minor manufacturing defect or is just fatigued from age leading to a early failure. Or stomp on it once and shear a cam lobe within 50k. Roll on the throttle easy every time and maybe see 400-600k miles. It's the same cost to get those power levels out of a big cam, but the big cam will handle it longer.Īs for how long a small cam turned up that far would last used as a toy, can't say. Most common complaints on it are the short life of the engine and needing a rebuild, usually cam failures. Towards the end of the small cam line Cummins offered a 400hp model. Eventually though it gets to where the fuel is just being flown into the cylinder instead of a mist, so poorly mixing with the air/incomplete combustion leading to less power and quickly rising EGT's. To a certain point you can get the fuel flow by using injectors with larger orifices and keeping the pressure at/below 200psi. Click to expand.Cam itself and possibly the crank bearings at those power levels.
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