ccscott49
Active member
The normal thing with engine rooms in larger craft, is to have the engines drawing air from outside the engine room, through effing big vents, so reducing the ber thingy effects, I know what you mean, but this is taking me back to my marine engineering days, the fans then would be, say two in and three out, to produce a small vacumn in the engine room to remove fumes etc. but still providing cool air. Now then If memeory serves me well, for smaller compartmetns, with the engines breathing from inside, to stop them sucking in salt laden air from spray etc, the engines will adequately suck there own air as long as the vents are big enough and positioned correctly, as with Nascar type events etc. The fans should then suck, this will then bring the engine room temp down and then the engines produce more power, drawing cooler air. I think, that 2 blowing and two sucking should be ok. But as long as the vents are big enough, it shouldn't make any difference. Or maybe at tickover have them sucking and as soon as the revevs rise, have them blowing, which would be the more ideal situation, the real ideal situation, is to have the engines draw through proper spray protected high mounted vents, but this isn't in keeping with pretty motorboats. Closing vents is a very smart idea, didn't know she had them, big ship technology that one!
