View Poll Results: Have you noticed such changes?
Yep.
27
84.38%
Nope.
3
9.38%
Haven't seen these temp changes, yet...
2
6.25%
Voters: 32. You may not vote on this poll
Does your C63 love cooler ambient air temps and run slower in warmer weather?
Thread Starter
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Joined: Feb 2010
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C63
Does your C63 love cooler ambient air temps and run slower in warmer weather?
(We're not talking about necessarily hot hot 100 degree days vs. 50 degree days. I've not had a chance to experience 100 degrees or 50 degrees.)
We've recently had cooler nights and I really notice a difference between the warmer days (mid to high 70s and clear with strong direct sunlight) and the cooler nights (mid 60s). These are nights that as soon as you open the door and have contact with the air it feels cold enough to put on a sweatshirt.
My car feels noticeably quicker on these nights when the car's ambient air thermometer reports mid mid-high 60s. Passengers have commented on this difference as well.
AMG menu oil temp remains the same, not too low, not too high. I understand these cars need to run a bit warm, so oil temp seems divorced from the temp/density of the air it's sucking in.
Have heard the 63s are sensitive to this but this is kind of ridiculous, I haven't experienced a car changing this much. Feels like a chunk of the car's performance is missing on warmer days, just that extra bit that makes you go, "whoa", is m.i.a.
Do you notice ambient air temps making that much of a difference for your car as well? Love to hear everyone chime in.
We've recently had cooler nights and I really notice a difference between the warmer days (mid to high 70s and clear with strong direct sunlight) and the cooler nights (mid 60s). These are nights that as soon as you open the door and have contact with the air it feels cold enough to put on a sweatshirt.
My car feels noticeably quicker on these nights when the car's ambient air thermometer reports mid mid-high 60s. Passengers have commented on this difference as well.
AMG menu oil temp remains the same, not too low, not too high. I understand these cars need to run a bit warm, so oil temp seems divorced from the temp/density of the air it's sucking in.
Have heard the 63s are sensitive to this but this is kind of ridiculous, I haven't experienced a car changing this much. Feels like a chunk of the car's performance is missing on warmer days, just that extra bit that makes you go, "whoa", is m.i.a.
Do you notice ambient air temps making that much of a difference for your car as well? Love to hear everyone chime in.
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
This is true for any car that has high compression or FI. With these type of vehicles you can feel the reduction in power and response caused be less dense hotter ambient air. The hot air is not as dense (with oxygen) as cold air. The computer adjusts the fuel mixture based on MAF readings and O2 trims. It reads less dense air and cuts the fuel a bit. This in turn reduces the power and throttle response enough that you can feel it in the SOTP. The closer a car is tuned to the edge the more apparent this phenomenon will be.
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Joined: Mar 2008
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From: ny
2019 s560 sedan
I had TTM thermal wrap all fuel lines and intakes and also installed the plenum spacers with a 180 thermo my car feels great . And of course colder temps equal better performance .Also the ceramic coating of the Kleemann headers made a world of difference as well
40-50 degrees is prime if you want to track the car .
40-50 degrees is prime if you want to track the car .
Last edited by DAGREEKNYC; Jul 12, 2010 at 01:48 PM.
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From: CA working like a slave
C63 AMG Arctic w/ Stage 1 Tune, DoubleXX pipe, MCD-631X coming soon
Yes, what happens is that it is part of the tuning process that is happening here. a tuning map is 3D, meaning that timing and fueling events are based on sensor input, such as air temp, coolant temp, load, rpm etc etc. A cool air temp signal and coolant signal def. kicks up the timing, and the car loves it, however the block/cyl head temp are also lower, and the air is cooler/more dense which creates a situation where the car is not so prone to detonation, and the timing can be more aggressive as well. Heat will always kill power, period..
Thread Starter
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C63
Thread Starter
Member
Joined: Feb 2010
Posts: 187
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C63
It's actually kind of disappointing, I don't feel like I'm driving a beast during these days. Makes it kind of boring, to be honest. I think I need to drive a regular car then I won't be saying that 
Former Vendor of MBWorld
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From: CA working like a slave
C63 AMG Arctic w/ Stage 1 Tune, DoubleXX pipe, MCD-631X coming soon
Former Vendor of MBWorld
Joined: Jan 2009
Posts: 600
Likes: 0
From: CA working like a slave
C63 AMG Arctic w/ Stage 1 Tune, DoubleXX pipe, MCD-631X coming soon
it was kind of a joke and shameless plug for my X pipes , they will do nothing for hot temps..but the pipes do offer a more freeflow exhaust, with a boost in HP and TQ, so on those days that the car is a little more sluggish, this added power should at least get you on par.
, they will do nothing for hot temps..but the pipes do offer a more freeflow exhaust, with a boost in HP and TQ, so on those days that the car is a little more sluggish, this added power should at least get you on par.
Former Vendor of MBWorld
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From: CA working like a slave
C63 AMG Arctic w/ Stage 1 Tune, DoubleXX pipe, MCD-631X coming soon
We have seen gains in the 15-25hp mark in the midrange on the dyno, many members here on MBW are running them, and have testimonials and youtube sound clips.
Sorry for the hijack of the thread..
http://www.youtube.com/watch?v=VWA_ZnEFZXY
http://www.youtube.com/watch?v=jSlmf...eature=related
http://www.youtube.com/watch?v=8_Nrz...eature=related
http://www.youtube.com/watch?v=J5MbKJqvJ98&NR=1
http://www.youtube.com/watch?v=O4L9k991QXw
http://www.youtube.com/watch?v=0C7KTFwv7D8
Sorry for the hijack of the thread..
http://www.youtube.com/watch?v=VWA_ZnEFZXY
http://www.youtube.com/watch?v=jSlmf...eature=related
http://www.youtube.com/watch?v=8_Nrz...eature=related
http://www.youtube.com/watch?v=J5MbKJqvJ98&NR=1
http://www.youtube.com/watch?v=O4L9k991QXw
http://www.youtube.com/watch?v=0C7KTFwv7D8
