9/1/2023 0 Comments Ford fsd 425 engine manualTurbo engines do have differant pistons and the compression ratio is slightly lower to compensate for the turbo. If you want to swap base engine you will need to swap over many of the parts including the sump which has the oil return fitting from the turbo, keep the same fuel pump and injectors as they should be matched. Might be worth also looking at your pressure cap anyway as the do suffer in the marine enviroment. Many people seem to suggest in adding a small header tank which would involve swapping the pressure cap and trying to locate the header tank higher than the engine and run a pippe to the heat exchanger. I have also got some water wetter to add to the sealed (fresh) water system but will need to drain off some of the water, running with 50/50 mix of antifreeze will also make the engine run hotter. It has been suggested that fitting a engine oil cooler helps a lot and keeps the pressure up, I have yet to fit one. It seems most of these engines run hot, mine does when using 3/4+ power or more.
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