 Rain Tray/guard, effect of leaving it out |
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| caraddict |
 Sep 3 2021, 03:36 PM
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#1
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Newbie  Group: Members Posts: 6 Joined: 30-April 21 From: modesto ca Member No.: 25,497 Region Association: Northern California  |
Some people feel it reduces engine temp to remove it. would like to hear opinions on this issue. Does it help or hurt? I feel porsche engineers now more about these thing than I do. Recently bought a 75 and PO removed it and feels it runs cooler in stop and go traffic here in California's great valley where temps are frequently over 100 degrees in the summer. The part came with the car and trying to decide if I should reinstall it.
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| mepstein |
Sep 3 2021, 03:40 PM
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#2
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914-6 GT in waiting Group: Members Posts: 19,272 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region 
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Do you guys even have rain anymore?
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| Root_Werks |
Sep 3 2021, 04:22 PM
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#3
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Village Idiot Group: Members Posts: 8,321 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest
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QUOTE(mepstein @ Sep 3 2021, 02:40 PM)  Do you guys even have rain anymore? (IMG:style_emoticons/default/agree.gif) I think it's been proven temps don't decrease if you remove the rain tray anyway. Not on a stock-ish 914-4. I would opt to leave it in if possible. That much less water getting on electrical do-dads etc. |
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| JamesM |
Sep 3 2021, 06:03 PM
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#4
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Senior Member Group: Members Posts: 1,900 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
QUOTE(Root_Werks @ Sep 3 2021, 02:22 PM) QUOTE(mepstein @ Sep 3 2021, 02:40 PM) Do you guys even have rain anymore? (IMG:style_emoticons/default/agree.gif) I think it's been proven temps don't decrease if you remove the rain tray anyway. Not on a stock-ish 914-4. I would opt to leave it in if possible. That much less water getting on electrical do-dads etc. (IMG:style_emoticons/default/agree.gif) I recall hearing the same about temps from tests with it installed vs not installed. The effect of not having it installed is that things in the engine bay get more wet. |
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| Mikey914 |
Sep 4 2021, 05:34 PM
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#5
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The rubber man Group: Members Posts: 12,669 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None
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It may be slightly cooler. However, if the car is outside you can get more dirt and grime not to mention water in the engine compartment. You have to weigh the benefit / reward.
Personally, I'd leave it in, you can get more cooling putting an LE airdam on. Not to mention the air diverters. If your temps are critical, you probably have a blockage at the oil cooler, and you will need to clean it out. |
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| bbrock |
Sep 4 2021, 06:48 PM
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#6
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains
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I could see the tray maybe increasing intake air temps a little by trapping heat in the engine bay, but it's hard to imagine it is restricting fresh air flow to the cooling fan enough to affect engine temps.
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