11-27-2014, 05:57 PM | #1 |
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Heat Soak Issues with M3/M4?
Just wondering if any of you that have already tracked your new M3/M4 have noticed any heat soak issues with the engine performance. I definitely experienced this with my 335i sedan (Nordschleife), and swore to myself that I would check on this before buying another turbocharged car. My 335i was obviously suffering power loss after only one lap of the 'ring.
I have not seen any mention of this in the published testing, but I did not see any warning of it on the 335i track tests either. Obviously some reviewers don't want to say negative things about their cars. In the case of my 335i, I think that all it needs is a larger intercooler. With spirited street driving, there is never a problem. Anyone been tracking their new M3/M4 that can give me a definitive answer? |
11-27-2014, 06:10 PM | #2 |
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BMW seem to have done a good job with the cooling systems on the F8X. After two back to back 30min sessions, I popped the hood of my M4 and touched the intercooler. It was litteraly cold to the touch; not warm or cool, but cold. All the other engine components around the intercooler were relatively hot as expected, but the intecooler metal casing itself was cold. I was impressed .
This was on a mild fall day (~70degF), the real test will be during scorching summer days when I have my R-Comps on the car. But I am confident it will hold up. My track buddies that run 1Ms also complain about heat soak, where they feel loss of power after a few laps. I think the fact that BMW went with an air-to-liquid intercooler on the F8X helps in the matter. See my complete track review here Last edited by CanAutM3; 11-27-2014 at 08:28 PM.. |
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11-27-2014, 06:52 PM | #4 |
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Cooling system has been superb on the F82 for me. Tracked mine back in late summer here in Phoenix upper 90s and temperatures never budged. Many Corvettes pulling off early due overheating but I just kept trucking right along. Also had A/C on full max the whole time by mistake. My review is here. http://f80.bimmerpost.com/forums/sho...ht=E36+round+2
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Road course laptimes for BMW M4 2015 6MT
WHP East Track: 1:04.880, Arizona Motorsports Park: 1:54.352 Road course laptimes for Porsche 911 991.1 GTS 7MT WHP East Track: 1:02.770, Arizona Motorsports Park: 1:48.889 |
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11-27-2014, 10:54 PM | #5 | |
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11-28-2014, 08:17 AM | #6 |
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No issues on my track days... the car never moved off of the standard operating temp and had no indication of heat soak, limp modes, power reductions, etc, etc.
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11-30-2014, 01:52 AM | #9 |
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I don't think I've seen a single report, professional or amateur of S55 heat soak. The cooling seems to be very robust indeed taken that there been several track events with the press at places like Portugal in summer where I guess the cars are run rather relentlessly over a couple of days.
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11-30-2014, 11:56 PM | #11 |
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My car ran really cool today at willow springs. And my inter cooler was cold to the touch right after a run
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12-01-2014, 02:30 PM | #12 |
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I am waiting for full track reviews which include
track pads track suspension track tires before happily concluding this car has no issues with heat management. I hope it doesn't so I can lease one and use it as my track car. So far the reviews have stock pads, stock tires, stock suspension, stock seats. I certainly hope no one is overheating the car in these conditions. Same story with the brakes. There are many comments about how good they are, but they're being tested with stock pads and PSS tires. That is not a true test of their capabilities, I'm sorry. I want to believe... |
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12-01-2014, 03:20 PM | #14 | |
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A car cannot be driven at 10/10ths without supporting goodies. Just as a better driver consumes more gas per session than a newbie, having better hardware allows you to push the car further As I said earlier, I want to believe. |
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12-01-2014, 03:28 PM | #15 | |
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12-01-2014, 03:45 PM | #16 | |
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I agree that a dedicated track car is the way to go but most of us can't go there |
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12-01-2014, 07:30 PM | #17 | |
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Road course laptimes for BMW M4 2015 6MT
WHP East Track: 1:04.880, Arizona Motorsports Park: 1:54.352 Road course laptimes for Porsche 911 991.1 GTS 7MT WHP East Track: 1:02.770, Arizona Motorsports Park: 1:48.889 |
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12-01-2014, 07:35 PM | #18 | |
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They seem to tell me what I want to hear, but then a SoCal member says he's heard of ones overheating. All cars will overheat eventually, but I would like additional data of this one. As I said, the best possible news is that it is almost indestructible. |
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12-01-2014, 07:54 PM | #19 | |
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Road course laptimes for BMW M4 2015 6MT
WHP East Track: 1:04.880, Arizona Motorsports Park: 1:54.352 Road course laptimes for Porsche 911 991.1 GTS 7MT WHP East Track: 1:02.770, Arizona Motorsports Park: 1:48.889 |
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12-01-2014, 08:40 PM | #20 | |
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I also read the Z06 comments. It'll be interesting to see what happens when a civilian tracks one in 100F heat |
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12-01-2014, 10:00 PM | #21 | |
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Not calling anyone a liar, but that guy hates the f8x cars and turbos, so I'd take those comments with a small grain of salt. Of course he is entitled to his opinion of the car in general. There have been no reports of overheating here, and two professional drivers have written reviews or shared feedback. Tc Kline himself who owns and tracks an m4, and karussel, who is a pro driver. To a degree, you could say the jury is still out. But with zero first hand reports of issues, I'd say the evidence is mounting |
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12-01-2014, 10:06 PM | #22 | |
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