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Heatwave is zapping power
#1602979
20/06/2017 13:40
20/06/2017 13:40
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Slugcatcher1
Unregistered
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Slugcatcher1
Unregistered
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On my way to work yesterday evening, my Coop was clearly lacking a significant number of horses. It must have been around 30 degrees at the time, and it felt like I'd lost about 20/25% power! Now, I have read that warm air in the engine bay will cause a car to loose power, but can it really be that bad?
I had considered the issue to be something else, but when I left work at 4am and the outside temp had dropped to about 18 degrees, I'm happy to say all horses had returned to the stable. In fact, it's fair to say the road was all mine this morning 😏.
Anyway, anyone suggest the best way to prevent this? And why exactly does it happen?
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Re: Heatwave is zapping power
[Re: ]
#1602985
20/06/2017 15:44
20/06/2017 15:44
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Joined: Dec 2005
Posts: 1,466 Kent
Submariner
My job on the forum
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My job on the forum
Joined: Dec 2005
Posts: 1,466
Kent
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Density of air and oxygen levels...higher engine temps etc....performance in a turbocharged car/the Coupe is reduced in hot weather.
Off the top of my head an Aquamist system may help?
Last edited by Submariner; 20/06/2017 15:45.
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Re: Heatwave is zapping power
[Re: ]
#1602996
20/06/2017 17:09
20/06/2017 17:09
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Joined: Dec 2005
Posts: 33,553 Berlin
barnacle
Club Member 18 - ex-Minister without Portfolio
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Club Member 18 - ex-Minister without Portfolio
Forum Demigod
Joined: Dec 2005
Posts: 33,553
Berlin
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Anyway, anyone suggest the best way to prevent this? And why exactly does it happen?
1) Live somewhere cold 2) on an NA car, it's simply that hot air is less dense than hot and so contains less oxygen, which means less fuel can be burned and so less power. On a turbo, recall that air is heated when it's compressed. If it's too hot getting to the engine you'll get preignition and other nasties; the ECU backs things off to avoid your engine going bang. 3) possible cures: water injection, better intercooler, active cooling on the heat exchanger, driving at night...
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Re: Heatwave is zapping power
[Re: ]
#1603037
21/06/2017 07:24
21/06/2017 07:24
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Joined: Feb 2006
Posts: 5,390 Essex
Trappy
Forum is my life
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Forum is my life
Joined: Feb 2006
Posts: 5,390
Essex
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I remembered a thread on this from years ago and recall posting about an article I read in Autocar on the subject. Here it is! 2006!!
F****** b****** thing...
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Re: Heatwave is zapping power
[Re: ]
#1603084
21/06/2017 20:02
21/06/2017 20:02
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Slugcatcher1
Unregistered
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Slugcatcher1
Unregistered
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Yes, here comes the rain!
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Re: Heatwave is zapping power
[Re: dante giacosa]
#1603110
22/06/2017 08:53
22/06/2017 08:53
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suba
Unregistered
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suba
Unregistered
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The only reason Subaru's have a bonnet scoop is because the intercooler is on the top of the engine... It's debateable whether they actually help to get the airflow where it needs to be if the intercooler is up front where it should be. Getting the fans on earlier will only help when standing - when moving at a decent speed they do very little to help if anything at all.
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