Wales
by Joske Vermeule, September 1
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Jun 14th, 2026
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Joined: Sep 2006
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With all this hot weather I have been wondering if anyone has tried boosting the fan power output for the heater/air con?
The a/c on my S4 is nice and cold but seems to lac the fan power to blow the chilled air into the car very well.
I thought perhaps upgrading the fan motors maybe an option?
All ideas welcome
Michael
Michael
Aero 8 S4
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Joined: Mar 2016
Posts: 844
Talk Morgan Regular
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Talk Morgan Regular
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Roof up seems to assist the aircon to work effectively. It fighting a losing battle otherwise......
Series 1 Aero 8
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Joined: Aug 2013
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Formerly known as Aldermog Member of the Inner Circle
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Formerly known as Aldermog Member of the Inner Circle
Joined: Aug 2013
Posts: 15,794 Likes: 15 |
Agreed, but it does keep one's feet and legs cool, which is a BIG improvement over the Roadster! Hood up, with the heater on, it is a very effective de-mister.
I'm not sure how the heater box could be made more effective. Half the problem is that air from under the bonnet isn't really separated from the incoming air.
One answer would be to position a new intake for the heater that pulled cold air from outside, but how to do it?
One way perhaps, could be to have a "throttle body intake scoop" on the side of the bonnet with a duct to the heater box. It would look OK.
Of course most of the year the heater is more important than the A/C.
Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...
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Joined: Jan 2009
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Charter Member
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Charter Member
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I dont know whether this is relevant but on my old Lotus the aircon system used plastic box and piping etc from Italy. When I put a temperature sensor in the output of the aircon on full blast, it was very close to ambient because the various flaps that controlled the mixing of the air didnt properly shut off the heater. So what I was getting was a mixture of hot air and cold air.
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Joined: Sep 2006
Posts: 638
Talk Morgan Regular
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OP
Talk Morgan Regular
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Posts: 638 |
Hi guys
Thanks for the comments but I still feel the issue is the low air flow from the fans, the air flow is cold enough but just not powerful enough.
Michael
Michael
Aero 8 S4
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Joined: Feb 2016
Posts: 8,683 Likes: 413
Needs to Get Out More!
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Needs to Get Out More!
Joined: Feb 2016
Posts: 8,683 Likes: 413 |
I remember reading about an open top custom car in the USA. The owner had fitted a truck cab air-con system so he could be bathed in cool air with the top down. At what expense to engine power I dread to think 
Richard
2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
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Joined: Sep 2006
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Talk Morgan Regular
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I think when I get a minute I will try removing the blower fan and see if I can find a upgrade for it
🤞🏻
Michael
Aero 8 S4
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