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      11-27-2014, 05:57 PM   #1
redz06
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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?
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      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, 06:41 PM   #3
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Everything I have heard about the F8x is that it is cooled quite well.
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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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      11-27-2014, 10:54 PM   #5
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Quote:
Originally Posted by redz06 View Post
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?
When i had my 335i, just a larger ic didnt fix the problem. And there were no fix for Guys with the slush box ...maybe that changed.
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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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      11-29-2014, 04:39 PM   #7
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Heat Soak?

Sounds like BMW fixed the issue. This is good news to me.
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      11-29-2014, 05:44 PM   #8
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No issues or noticeable power loss for me on track.

1m with larger fmic still got very hot iat that affected performance
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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, 08:06 AM   #10
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Car ran fantastic at the track. Gauge never went above 1/3rd
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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, 03:17 PM   #13
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How does different suspension, brake pads and tires make a difference with heat soak of engine components?
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      12-01-2014, 03:20 PM   #14
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Quote:
Originally Posted by FTS View Post
How does different suspension, brake pads and tires make a difference with heat soak of engine components?
i'd say so. It gives an idea of how hard someone is tracking the car.

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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Quote:
Originally Posted by SYT_Shadow View Post
i'd say so. It gives an idea of how hard someone is tracking the car.

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.
IMHO no street car should be driven at 10/10 the on a track or you're asking for a big wreck and/or mechanical issues. If you have the ability and/or desire to drive at 10/10 ths, then a true race/track car would be my recommendation for anyone. YMMV of course.

Bish
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      12-01-2014, 03:45 PM   #16
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Quote:
Originally Posted by thebishman View Post
IMHO no street car should be driven at 10/10 the on a track or you're asking for a big wreck and/or mechanical issues. If you have the ability and/or desire to drive at 10/10 ths, then a true race/track car would be my recommendation for anyone. YMMV of course.

Bish
Many members here have dual use cars, which they track pretty hard.

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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Quote:
Originally Posted by SYT_Shadow View Post
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...
Yes, I wish someone would track their car hard with race pads, track tires, A/C on max, and in 100 degree temps so we can be absolutely assured that the car will not have any overheating problems.
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      12-01-2014, 07:35 PM   #18
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Quote:
Originally Posted by MaynardZed View Post
Yes, I wish someone would track their car hard with race pads, track tires, A/C on max, and in 100 degree temps so we can be absolutely assured that the car will not have any overheating problems.
I had the pleasure of reading your track review as well. I've read all the ones here.

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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Quote:
Originally Posted by SYT_Shadow View Post
I had the pleasure of reading your track review as well. I've read all the ones here.

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.
I'd be curious to read the review about the S55 overheating if you have a link? Yes, I agree all cars will overheat eventually in certain circumstances. The new Z06 overheated at Laguna apparently after a bunch of pro level drivers took turns hot lapping it.
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      12-01-2014, 08:40 PM   #20
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Quote:
Originally Posted by MaynardZed View Post
I'd be curious to read the review about the S55 overheating if you have a link? Yes, I agree all cars will overheat eventually in certain circumstances. The new Z06 overheated at Laguna apparently after a bunch of pro level drivers took turns hot lapping it.
It was a comment by a member called kaiv. He frequents the 'other' forum.

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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Quote:
Originally Posted by SYT_Shadow View Post
It was a comment by a member called kaiv. He frequents the 'other' forum.

I also read the Z06 comments. It'll be interesting to see what happens when a civilian tracks one in 100F heat
I'd like to see those actual people's remarks, not second hand from kaiv

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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Quote:
Originally Posted by KennyPowers View Post
I'd like to see those actual people's remarks, not second hand from kaiv

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
Certainly enough evidence for a civil trial, and to me, enough evidence to convict the F8x in a criminal trial, of having a very sufficient cooling system.
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