Engine Starving for air?
07-26-2016 | 01:54 PM
#51
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From: Charleston, il
I am very interested about your findings when you start taking temps. I have single planes and tall arrestors that are very close to the underside of the hatch. I would imagine it gets very warm under there
07-26-2016 | 02:37 PM
#54
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From: Charleston, il
07-27-2016 | 03:39 PM
#58
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True that. Bring in 3633 CFM and the intake air temp will be ~ 110F in that example. Cold air intakes make sense and are common on supercat lites where the big 12" air duct entering the engine compartment is pointed right at the front mounted throttle body on the 525. I don't know why we don't see more of this on performance boats, except for the challenge of keeping water out of the duct.
07-28-2016 | 07:37 AM
#59
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From: Fredericksburg, Va
EZSTRIPER - Those fans exhaust the engine compartment they don't suck air in except by causing a negative pressure inside the engine compartment. Even if you installed them to pull air into the engine compartment all they would do is restrict the flow because the engines draw a LOT more air than what those fans will pull in. The open hole with the fan removed would allow more air flow. What they need is more or bigger holes to let air in.
You may not realize that I am an air flow specialist.
You may not realize that I am an air flow specialist.
07-28-2016 | 05:39 PM
#60
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From: ALTO, MI
My point is that at WOT and probably anything above and including cruise those fans are nothing but an obstruction to air flow. They are actually in the way of the airflow the engines are trying to suck in. Those fans work only at idle and low speed. IF the boat ( just about every stock boat out there doesn't have anywhere near enough) had enough air ducting then the fans wouldn't be an issue.
