10-12-2015, 07:09 AM
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#1
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Registered User
Join Date: Nov 2004
Location: New Jersey
Posts: 8,709
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Do these engines love 60F temps?
Is anyone else noticing much smoother and happy sounding engines in these crisper days of fall? It seems especially noticeable in the evening when there aren't as many cars around and I can filter out all the traffic noise. It strikes as though there is a point where the cold air coming in has a sweet spot. I've been keeping a log of each drive and temps to see if I can notice a difference as the weather gets colder.
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GT3 Recaro Seats - Boxster Red
GT3 Aero / Carrera 18" 5 spoke / Potenza RE-11
Fabspeed Headers & Noise Maker
BORN: March 2000 - FINLAND
IMS#1 REPLACED: April 2010 - NEW JERSEY -- LNE DUAL ROW
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10-12-2015, 07:44 AM
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#2
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Registered User
Join Date: Apr 2015
Location: Denver
Posts: 62
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I was thinking the same thing....I also noticed it all summer while driving in the mountains with cooler temps.
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10-12-2015, 07:49 AM
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#3
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Registered User
Join Date: Feb 2015
Location: QC
Posts: 412
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Perhaps a bit rich? Have noticed that shifting is a little notchy in the crisp near freezing temps I've been commuting in these last few mornings...
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10-12-2015, 07:57 AM
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#4
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Registered User
Join Date: Sep 2013
Location: Chandler, AZ
Posts: 1,796
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I think it's as simple as cooler air is denser helping to make a little more power.
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03 Carrera
02 Boxster S Guards Red, black interior with matching hardtop
89 Carrera 4
89 944 S2
78 911SC
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10-12-2015, 03:10 PM
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#5
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Registered User
Join Date: Sep 2008
Location: Florida
Posts: 2,493
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Can't say I've noticed it in the Box but my 84 Alfa Spider really feels more responsive in cooler weather.
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10-12-2015, 04:12 PM
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#6
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Beginner
Join Date: Mar 2013
Location: Houston
Posts: 1,659
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Quote:
Originally Posted by WillH
Perhaps a bit rich? Have noticed that shifting is a little notchy in the crisp near freezing temps I've been commuting in these last few mornings...
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I haven't noticed anything...
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2003 S manual
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10-12-2015, 04:26 PM
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#7
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Registered User
Join Date: Feb 2015
Location: QC
Posts: 412
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Quote:
Originally Posted by Jamesp
I haven't noticed anything...
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Car's due a full fluid flush this winter, hoping that fixes the cold weather cold engine shifting notchy-ness. Have plans for one of Bens shifters as well.
No noticeable difference for me engine wise with temperature. But then again we only get a month or two of hot humid weather here and the AC is on the entire time so hard to compare that to the rest of the time...
Last edited by WillH; 10-12-2015 at 04:39 PM.
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10-12-2015, 04:32 PM
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#8
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Registered User
Join Date: Oct 2014
Location: California Central Coast
Posts: 1,476
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Perfectlap you are quite tuned into your car to notice that change over time. I live 20 minutes from the ocean and often the temp difference to the coast is 40+ degrees. When I drive over the coast range I can leave 100 degrees and =/- 20% humidity and be in 60 degree 60% humidity. There is absolutely a difference, almost like high altitude to sea level breathing. With my old air cooled cars it was even more apparent.
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10-12-2015, 04:58 PM
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#9
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Porsche "Purist"
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
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I've found that letting the car idle in neutral with no foot on the clutch for a minute or 2 greatly improves the first couple of shifts during cold weather.
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1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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10-12-2015, 08:32 PM
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#10
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Hawaiian Driver
Join Date: Apr 2014
Location: Maui
Posts: 58
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I have absolutely noticed my car runs sweeter at elevation 4-7 thousand feet. Seems to love the cool air.
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2005 Boxster S 6 Speed
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10-13-2015, 04:10 AM
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#11
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Engine Surgeon
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
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All engines love cooler charge temps..
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Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
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10-13-2015, 05:49 AM
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#12
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Registered User
Join Date: Dec 2013
Location: Greenville, S.C.
Posts: 2,670
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My shifter feels best at these cool but not cold temps.
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10-13-2015, 08:38 AM
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#13
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Registered User
Join Date: Apr 2012
Location: ohio
Posts: 86
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cool weather
The engine temperature sure loves the cool fall weather - especially on the highway.
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10-13-2015, 09:44 AM
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#14
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Registered User
Join Date: Jul 2004
Location: Houston, Texas
Posts: 7,243
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My butt dyno says the cooler temps are better for performance in the boxster but my tranny gets all notchy and harder to shift so it has its good side and bad side.
My next Pcar will have a PDK in it and then I'll be able to be more objective!
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10-13-2015, 07:01 PM
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#15
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Registered User
Join Date: Nov 2013
Location: Colorado
Posts: 442
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cooler air is denser air and denser air is more Horse Power.
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10-14-2015, 12:57 PM
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#16
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Certified Boxster Addict
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,669
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And cooler temps mean cooler transmission fluid which means stiffer shifting until the fluid warms up a bit...
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1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
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10-15-2015, 06:38 AM
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#17
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Registered User
Join Date: Nov 2004
Location: New Jersey
Posts: 8,709
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I guess my thinking was at what point does the air get too cold to see a performance gain?
For instance do Rally Car racers see better engine performance in wintery conditions vs. cool weather.
Those guys really cover the calendar.
__________________
GT3 Recaro Seats - Boxster Red
GT3 Aero / Carrera 18" 5 spoke / Potenza RE-11
Fabspeed Headers & Noise Maker
BORN: March 2000 - FINLAND
IMS#1 REPLACED: April 2010 - NEW JERSEY -- LNE DUAL ROW
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10-15-2015, 07:33 AM
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#18
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Registered User
Join Date: Sep 2013
Location: Chandler, AZ
Posts: 1,796
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I'm sure there is a point were it gets to cold and performance suffers but for most of us that's never an issue. Were I notice bigger differences is with forced induction engines. The E55 AMG I had, which has a supercharged 5.5l motor, on hot 110 degree days would easily loses 50 to 75 hp and on cool 50 degree days have tear your face off levels of power. The Mini Cooper S I currently have also responds similarly with it 1.6l turbo motor easily lossing 10% of it power. More heat equals less power. Furtunately in the Boxster it's is not as dramatic.
__________________
03 Carrera
02 Boxster S Guards Red, black interior with matching hardtop
89 Carrera 4
89 944 S2
78 911SC
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