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Author Topic: Air Shroud and Engine Cooling  (Read 17765 times)

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Offline Painlesstom

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Re: Air Shroud and Engine Cooling
« Reply #75 on: February 03, 2018, 01:07:03 PM »
You're very welcome, I'm glad I've been able to help get these boats working right. Look forward to hearing how you like all the changes, I'll be waiting to hear you're ready for the cable control conversion. lol That's the last big thing you have to address.  \./8
Tom

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Offline strick

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Re: Air Shroud and Engine Cooling
« Reply #76 on: October 26, 2019, 10:16:12 AM »
Just curious as I have a 2017 model...has anyone tried taking off the Air Plenum and doing away with it and just enlarging the air intake at the hood such as riverman has done...in other words just flooding the engine compartment with air ? anyone tried that yet to see if there is a difference in performance?

strick

Offline Painlesstom

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Re: Air Shroud and Engine Cooling
« Reply #77 on: October 26, 2019, 11:52:49 AM »
If you get rid of the plenum completely you will just end up recirculating the hot air coming from the engine and it will overheat. The plenum is necessary, and it needs to be able to flow as much or more air than the flywheel fan is capable of. Then the exit area should be twice as large in volume. Inlet out outlet must be separated, no compromising to be done there.
Tom

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Offline happul3

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Re: Air Shroud and Engine Cooling
« Reply #78 on: October 26, 2019, 02:38:48 PM »
I followed Tom's recommendation on making air intake wide and it does make engine run better. However, I do not agree that outlet needs to have twice the area. With stock Eskape cover, the exit is two holes in relatively thin plastic. In contrast, the intake is a tunnel with substantial length. The airflow resistance of the intake is therefore much greater than the airflow resistance of the outlet even if both have the same areas/cross-sections. In other words, increasing outlet will have hardly any effect of total forced airflow.

It will increase natural convective as well as radiative cooling, though, so there is some benefit. But that benefit isn't related to the size of the inlet and so the outlet does not have to be specifically twice as wide. 

Offline strick

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Re: Air Shroud and Engine Cooling
« Reply #79 on: October 26, 2019, 03:18:02 PM »
Got it. Looks like I will be in large in the plenum. Thanks fellas

Strick

Offline Painlesstom

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Re: Air Shroud and Engine Cooling
« Reply #80 on: October 26, 2019, 03:23:19 PM »
Good move, get rid of the "cold air" bridge too. That causes lots of low rpm off idle hesitation issues.  ;)
Tom

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