02-18-2019, 12:17 PM | #1 |
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S55 break-in requirements?
I’ve had a weekend with the car and so far I’m loving the step up from our m140. I was a little worried after seeing the recent YouTube post from Nfoxtv stating that it wasn’t so much of a Change to convince himself but I have to say the experience is very different. It’s much more raw and grunty than the 140. And the sense of stability when you start pushing is awesome!
I had a few comments from the dealership which I thought I’d share to get peoples thoughts on. Firstly I had the comments around the car having it’s power somewhat restricted prior to its break in service. I’ve seen the threads on this before but I just wanted to confirm that it was info I was getting from the dealer when I picked the car up. Secondly they said not worry about revving past 4K during run in so long as it wasn’t prolonged bouts. They were very emphatic about being prompt with the run in service so I didn’t get the sense they were just more laid back about things... I’m curious what the general consensus is on this point? Last edited by Benjoepen; 02-18-2019 at 12:29 PM.. |
02-18-2019, 01:49 PM | #4 |
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I doubt the power is restricted, I think the only thing restricted is launch control.
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02-18-2019, 01:57 PM | #5 |
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Can't remember exactly where I copied the following; even though it is for Porsches (OK, there, I said a dirty word!), the basic advice seems sound and applicable to all high performance engines... which is to gradually increase RPMs over the break-in period. Also, conventional wisdom is not to drive for an extended distance at the same RPM which means no cruise control on a extended trip during break-in.
Porsche GT boss Andreas Preuninger on Porsche break-in, during a video presentation last Autumn, as reported by someone on Rennlist (http://rennlist.com/forums/gt4/90228...e-rules.html): "I videoed AP's presentation, and here is what he said: «I can only tell you how I personally do it, or how we do it at Weissach – for the first 500 kilometres or 300 miles, we don’t drive that car car ever over 5000 rpm, never. From then on, every 200 kilometres, we up the rpms by 500, so we end up at 1300, 1400 kilometres at the threshold before we can really go full throttle, at 800 or 900 miles.» He then went on that this procedure was really important for the GT3 RS engines given their more «delicate» rings - and how important this break in really is for any of their engines. Another point - he recommended to realign the car after 1000-1500 miles due to settling - especially since the tires are getting bigger and bigger, and more sensitive to changes. The RS apparently is really sensitive around this. You figure the head of the GT program would give you the straight goods." Preuninger also pointed out that people driving their GT4 or GT3 straight from the dealership to the track are hurting their cars.
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02-18-2019, 03:01 PM | #6 | |
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02-18-2019, 03:29 PM | #7 | |
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02-18-2019, 04:39 PM | #8 |
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This guy does a good job of explaining some of the information on the break-in period:
It's not specific to the S55 or even BMWs, but it is still applicable. As far as I know, the consensus on the car being "power restricted" prior to the break-in service has been debunked. The technicians don't do anything during the break-in service to change he power output.
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02-18-2019, 05:10 PM | #9 | |
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02-19-2019, 01:40 AM | #10 | |
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Now he could have been wrong or fucking with me but he seemed to indicate that they did something... I didn't press him for any details. |
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02-19-2019, 01:42 AM | #11 | |
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02-19-2019, 01:47 AM | #12 |
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It's kind of like a placebo. People think that the car has more power after the break in service and whether it has more power or not at least it has a positive psychological effect on the person who owns the car
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02-19-2019, 04:30 AM | #13 |
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02-19-2019, 12:54 PM | #14 | |
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02-19-2019, 01:27 PM | #15 | |
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I do not believe manufacturers do a factory break-in, preliminary or otherwise.
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02-19-2019, 01:38 PM | #16 | ||
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02-19-2019, 07:28 PM | #17 |
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Depends on the car actually. I recall that Honda actually does a full break in of their motor in the new NSX before handing it off to the consumer. Essentially they simulate hundreds of miles on an engine dyno. To my knowledge, bmw doesn’t do this with any motor.
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02-19-2019, 08:01 PM | #18 |
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I also watched a video recently (maybe the Engineering Explained one I posted earlier) that said that Nissan (?) does a factory break-in on their performance engines before dropping them into the car.
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02-20-2019, 06:13 AM | #19 |
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There is no unlocking of power at 1,200 mile service.
Reasearch break in - everyone has a belief. You have Porsche on one side, this guy in the middle, https://www.enginelabs.com/news/disp...mance-academy/, to this guy http://www.mototuneusa.com/break_in_secrets.htm. Oh and here is one in the middle with some real interesting results. https://www.motorcyclistonline.com/b...in-myth#page-3 Here are some facts 1 you are new to the car, don't go crazy and kill yourself 2 easy on the brakes for first few hundred miles 3 don't miss your 1,200 mile appt. 4 always make sure engine is at temp before getting on it. Me? I personally think babying the engine is the worst thing you can do and that the recommendations in the manual are written with lots of help from the BMW legal team (see #1). Oh yea, in all my years on these boards I've never seen a person write "I was hard on my engine in the first 1,200 miles and I regret it" but that's just me
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02-20-2019, 11:17 AM | #20 |
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The thing about not using cruise control is interesting, if I do a big road trip with my new car (which I will have to do to drop my old car off in another state) does that mean I can't just go 75 the whole time?
You are saying I need to switch up the gears or RPM on the highway? |
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02-20-2019, 12:45 PM | #21 | |
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Plus it gives you an excuse to play a bit, ie drop a gear and accelerate every so often. But just varying 3-5 mph over time makes a difference. PS: One BMW that I picked up > 100 miles from home and may have used cruise on the first trip, did seem to be more loose (and flat) at a certain highway RPM. Since then I have made it a point to vary when new.
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02-20-2019, 12:47 PM | #22 | ||
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