01-07-2021, 01:16 PM | #177 | |
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Be more worried about fuel starvation due to the fuel tank or the accessory belt coming off. |
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01-13-2021, 04:12 PM | #178 | |||
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Super knocking is for lack of better word, LSPI, yes it can be contributed to oil or carbon build up, but a bad CAL can/will induce LSPI, or simply just the cylinder getting too hot. Factory measures has ways to combat LSPI, pulling out lots of load, dumping fuel. LSPI cannot be solved by just pulling out ignition timing, as it happens before spark occurs. Ultimately, something was off, wasn't detected early enough, and continuing to drive the car led to the situation we're in now, unless a post-mortem was done and logs were done throughout the day, its really hard to point fingers.. and there's no point in pointing fingers either. Quote:
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50/50 is about as much as I'd go, without fail safes. Using WMI for cooling is great, but using it for octane and fueling without fail safes is asking for the same scenario to occur if it were to fail and your baseline fueling is at the edge.
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01-14-2021, 08:47 PM | #179 |
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This has been asked but I don't think it has been answered definitively. Is it prudent to move from a stage 2 93 tune to a stage 2 91 tune running 93 AKI (Texas)? I have been logging and seeing the odd knock but would like to play it safe at the cost of some performance (and I can definitely feel the difference).
Last edited by cpow99; 01-14-2021 at 08:54 PM.. |
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01-15-2021, 08:24 AM | #180 | |
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01-17-2021, 10:33 PM | #181 |
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https://www.bootmod3.net/log?id=6004...729b137088acdc
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01-18-2021, 08:11 AM | #182 | |
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take a WOT log to redline in 3rd gear. Continue through 4th gear if safe/possible in your area. |
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03-10-2021, 03:46 AM | #183 |
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Add another blown M2 engine running bootmod3 to the list.
Details: 2018 M2 -23,000 miles FBO but factory cat PTF OTS stage 1 93 tune Shell 93 fuel from southwest Ohio No Logs - full send Engine running WOT on highway and went into Limp mode on a 3rd gear pull near red line. Tell-tale white smoke from exhaust and oil on top of engine near cylinder 1. Diagnosis - detonation melted piston 1. Machine shop replaced piston - for reference, it is not a N55 or S55 piston but rather some variation between. Had to order it from Germany - took 2 months to get it. Car has been sitting since August 2020 and I still don’t have it back. Dealership told me to kick rocks. All in this will cost me $9,000 plus the engine builder in TX recommends draining fuel tank and installing new injectors to the tune of an additional $1800. My recommendation and takeaway from all this is only custom tune the M2. BOOTMOD3 OTS maps, at least for 3 owners so far on the M2 aren’t safe. One other thing to note: If you are new to tuning or BMW engines, don’t take a limp mode incident lightly. You need to get the codes on what is going on that causes it. I had several limp modes over the year of ownership, one under factory tune that corrected itself but this could be an indicator that something else was wrong - and now because of the tune BMW is off the hook for owning their issue. |
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03-10-2021, 04:06 AM | #184 | |
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So far all the fails have one thing in common, no logging. Next detonation cracks pistons, lean conditions melts them. So it might be a combination of both. Also I hope your shop ordered an m2 specific piston not some random piston of the same size or else compression will be off.
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03-10-2021, 04:08 AM | #185 | |
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In terms of meth I would not run any meth kit without fail-safes or else risk hyper lean conditions when you get a misfire and the meth kit doesn't stop spraying.
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03-10-2021, 01:23 PM | #186 | |
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I only run LL01 oil on my cars and preferably 0-40 when I can. Which really only leaves me with a couple of choices |
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03-10-2021, 03:58 PM | #187 | |
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Technically I also wanted to add that newer EURO cars are designed to no encounter LSPI and that is why stock tune cars on the recommended gas dont suffer from this issue, it is only when people start adding poor calibrations. Again why I don't personally like OTS maps.
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03-10-2021, 05:39 PM | #188 |
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I also wanted to add this quote regarding oil and LSPI "Oil is band aid. They key is design. European turbo engines, with few exceptions some 15 years ago, are not prone to LSPI.
Some latecomers in this "downsizing" game are the problem. Also, bigger turbo engines (and 2.0ltr engines should not have this issue, unless poorly designed) do not have this issue So, what do you have in your garage? Problem with Redline oils is that their intended application. They are good oils, but I would not trust them full OCI as they have very high oxidation. But that is OK, as their application is more for people who look for performance than long OCI. better solution would be Euro oils such as ACEA A3, C3 etc." I really don't think oil is a huge concern for LSPI in ops case, most likely it was a lack of logs. That seems to be the culprit in all of these it's engine failure posts.
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03-10-2021, 06:32 PM | #189 |
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You can't simply just say lack of logs and dismiss the tuning companies any partial responsibility. The maps advertised is off the shelf which means it should be relatively ready to use as it states. The company does not advertise that even if you get to the octane level, have the required bolt ons and/or plus more supporting hardware, it can still blow an engine. Not saying that logging and learning to read the logs is bad practice but that is simply not how the product was sold. From the logs I was able to save with my time just before the engine blew it only showed one concerning item which was high IATs (as per Sean, to my memory) so not sure how logging would have solved the issue in my case. Street conditions and on track data would be different as well. Gasoline could be different from one region to another so do we log and keep on top of that all the time? The tuner sets out an outline of what is needed to run the tune, the customer meets the requirements but the tune is still too aggressive because of unknown reasons to the user and this is the customer's fault? No where on there website or manual does say to constantly check for faults in your OTS tune or provide additonal info on potential issues with tunes. Nor do they give you a crash course on reading the logs. Again, not saying learning about logs is bad but it is not what is advertised for the company. Assuming, that the blown engines are tune related in the first place.
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03-10-2021, 07:21 PM | #190 | |
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1) Yes I can absolutely say it was due to the lack of logs and it was 100% not the tuning companies fault. Why? because these maps are well tested and 99.9% of the people using it have no issues, there will always be risk involved as it is an OTS map as there is no such thing as one size fits all. So if you don't want to be part of the 0.1% you have to push probability in your favor and go the extra step to check and make sure it plays well with your car. Also anytime you push the car beyond factory limits there is no guarantee it will last, so either way it was the end users fault. 2) OTS does not mean ready to instantly use without issue, off the shelf products just like clothes to humans are made to the generic specifications of cars all over the world. There is always a chance it doesn't fit your car because all cars are different down to engine tolerances, and climate conditions. Its your job to check to make sure it fits. 3) No company advertises that, but it is a logical risk when pushing beyond manufacturers specifications. It's not bmw's job to make these cars strong enough to handle more power than what they design it for. If you want to push the limits you have to accept the risks and do what you can to mitigate said risk. Remember when pushing the envelope you pay to play. 4) You are correct you don't need to learn how to read the logs, you just take the log and send it to BM3 for verification. 5) Are you serious? If you had reviewed your logs you would have seen concerning iats, then you would have known this is a problem you need to address it. First you would flash back to stock and in the mean time look at things required to solve iat's, such as an intercooler. If you had an intercooler then something is definitely wrong which is causing high iat's. Then further diagnosis would continue. That would have absolutely saved your engine instead of ignoring it. It is the same thing as early screening for diseases in humans, you find early signs and stop it before it progresses too far to be stopped. 6) Absolutely street and track conditions are different. Same as altitude, fuel quality, climate etc. That is why there is no such thing as one size fits all when pushing beyond factory margins... Hence why you have to do atleast one initial log for every use case (aka street driving, track use etc). If you had done the intial logs and sent them for review then that immediately eliminates almost any chance of issues in the future. The only chance left is bad gas, and that too can be mitigated with logging. 7) Yes you have to keep ontop of logs at all times if you don't want to be part of the 0.1% statistic. I log every tank of gas, have gauges up every second the car is moving so I can see if something is wrong or looking weird. I even have alarms set so if parameters deviate too farm from the norm I can get off the gas asap and stop the car if I need to. That's all part of what you need to do when pushing the envelope. No one will tell you to do this but if you don't want to be a statistic that's what you need to do. Don't forget this was not how bmw intended the car to be driven. Having said that you don't always have to do this, so long as you critically get those first logs in. Then only log again if something changes like new parts or different gas stations. If you are too lazy to log and keep on top of things I recommend staying stock or going with Dinan so you get a warranty. 8) You clearly didn't meet the requirements if your car was suffering from increased iat's... But if you atleast did the initial data logs for every use case and submitted them for review then it would have prevented your engine failure because those IAT troubles would have been spotted. 9) No they don't say to check for faults in the ots maps, but you need to check if your car is meeting the requirements to run said map. They say 91 octane is needed, how do you know you got good gas every time? Hence the requirement for logging. The ots map will always be the ots map nothing will change there, but conditions your car is facing will always change that is what you need to check to see if it conforms with what your tune wants. if you atleast do the initial log after first flashing the tune that immediately eliminates most of the risk (atleast 90% chance or more of never encountering an issue again) of increasing power with a tune, but then if you don't log constantly you never know if you have a tank of bad gas. And if you do that's just how it is, bad luck. 10) Now I know you didn't read the manual: https://bootmod3.atlassian.net/wiki/...R%20MANUAL.pdf There is a whole section on logging. Also you don't need to know how to read anything just send them the log. Overall I'm really honestly and truly sorry to hear your engine blew up and you had a poor experience. But so far every single person who had engine failures on an OTS map had one thing in common - they didn't log. This means any under lying mechanical problems, or if the tune was too aggressive for their car was not discovered and now was the reason why their engine failed. It wasn't the tune's fault because that's the same for everyone it is just that their car or use case didn't play well with it and they did not log to verify. Note if you really want a set it and forget it experience (no need to switch between types of it's maps or try to read logs, just send him the data log files and it's all good) find a good tuner like cookiesowns get a protune custom tailored to your car. Then no matter how you drive your car the tune will always be suited for it and you minimize engine failures. You literally don't have to worry about anything after that it will be perfect straight out of the box and fit your car better than any OTS map and even offer more safety because it will not be asking for too much of your car in any area it will just be perfect. Then the only chance left you have for issues is bad luck and bad gas.
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03-10-2021, 08:13 PM | #191 |
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IIRC didn’t op have super knocking codes with cylinder deactivation also and just reset and continued on with the next session?
Like I said, you can’t just blame only the tuner in this case. Anytime a car throws a CEL should not be taken lightly. |
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03-10-2021, 08:41 PM | #192 | |
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Probably a result of high track stress creating excessive egts causing a positive feedback loop of increasing iat's (which were already high on the street) resulting in not just normal knock but super knock, which was easy on low octane gas. So likely LSPI in this case was fuel and hot temps on a tune too agressive and not oil blow by caused.
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03-10-2021, 11:22 PM | #193 |
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The manual explains how to log n not what the logs mean and how to handle situations. Again, the company does not instruct u to verify how well their ots maps work on your car. Again, this only saying if the blown engines are hypothetically due to tune and not anything else. The point is, if you need to check on variances such as gas everytime like you suggest cuz it can potentially blow your motor, sounds more logical the company either provides better disclaimers or a verification process or a SAFER TUNE. But of course that would not happen cuz they are a company looking to make sales. I am not saying your idea and practice of logging is not good practice but you also can't say everyone would have what ever your def is of "experience and knowledge" of tuning. I gave the logs (blown motor) to PTF first time around and they said nothing useful except IAT might hav been issue. Keep in mind we r talk abt stage 1 91 on US gas where it is advertised as no additonal hardware needed. 2nd time around I gave them logs for new motor and with stage 2 91 ACN on 91 CAD gas and they said octane was not enuff and reduced timing to max 7.5. So clearly these tunes are aggressive for west coast in which the company does not disclose and perhaps stage 1 is even more so. Point abt management effort is irrelevant as this product is not sold as a need to be constantly monitored item. I agree with you that ideally you would want to put that much effort into your logs to see whatever. But a simple point to make is that no one raised points on verifying bm3 tune safety until this post was made. So that speaks in how the company has marketed the product and how it was used. Not that I could go back to not using them but I would not defend them so adamantly on the reasons above. Again, your logging solution was only in hindsight of the situation. The product didn't have these "instructions" at purchase. If we follow the should have logged method then at any time the company puts out errors or bad tunes then well, doesn't matter, should have logged.
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03-11-2021, 08:11 AM | #194 | |
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I live in Arizona; fuel is pure ass here, I use a little vp octanium when I fill up just to get clean timing on 91 octane; I'm on mhd which probably has a slightly less aggressive timing map and I still pull timing on fresh shell 91. With vp octanium, a few ounces and my timing is cleaned up, ideal? Nope, but I, the end user, has to problem solve. Companies are out to make sales, sure; but they also offer to view your logs and give you advice in that sale, it's up to you to make sure your car is healthy. You check you oil? You check your coolant? You check your tires? You should absolutely check over the health of the engine by logging occasionally, we have it easy, these cars are stupid simple to log. I'm sorry to hear about the blown engine |
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03-11-2021, 02:32 PM | #195 | |
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On sti's there was no such thing as running full time off ots tunes, every single mod from an intake to downpipes to intercoolers needed $800 pro tunes, and logging every single gas tank was common. That was the hard life of nodding especially with how stupid subarus ecus were and how fragile the ej257 is. Thats why I believe in car progression, start with something cheap that will teach you the fundamentals before moving on to the expensive stuff. That way you get a good background and develop good habits. Like for instance I have the entire MHD tuning suite, but I will not flash anything until I have all my supporting mods and establish a good quality fuel source. I will also likely not use ots maps, I will be going for a custom tune.
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03-11-2021, 07:31 PM | #196 | ||
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03-12-2021, 12:16 AM | #197 | |
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I agree. Honestly if i wasnt logging, i wouldnt have known my hpfp was struggling and causing stuttering. Its bad enough that the gas here is crappy, but with the fuel oump issue, a big knock event or super knock was inevitable. Now i lve just upgraded to a dorch pump and at least my hpfp issues are gone. But yeah point is, logging is paramount when pushing a car to its limits with a tune. I learned to be anal about it during my ownership of my subaru sti. That car will blow up if you arent logging and addressing issues right away. |
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03-12-2021, 01:23 AM | #198 | |
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Maintenance is a huge issue on this platform too, I see people not even wanting to shell out some money to change their oil more frequently. That's going to be fantastic having dirty old oil that can cause more carbon build up on pistons which can inturn cause more issues with LSPI down the road.
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