06-26-2018, 02:27 PM | #45 | |
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I see there are several flash tuning options on the market, bm3, ess, mission tuning, bpc..... The bm3 being the cheapest among them, any reason why? Which one is the most aggressive? Increasing stock 11.5psi to 18-19psi, seems really pushing it.... |
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06-26-2018, 03:55 PM | #46 | |
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When I first hit the throttle after the tune, it scared me how much more of a monster it was. I thought the engine was going to fly out. It is a pretty noticeable increase. Granted you will be operating the turbos at higher levels than what they set them to do but most turbos are designed for north of 20psi duty. The manufacturers are the ones restricting you from doing so. It is hard to say why it is cheaper but it is a more widely available tuning platform that covers many BMW engines right now. Could be economies of scale, strategic pricing model, or some other reason for keeping it positioned this way in the market. There are not many options for the 50i and almost all of those came out within the past year and just recently, over ODB2. As for as which is more aggressive, maybe BM3, maybe some other. I do know a guy with the 50i stage 1 BM3 setup ran a 12.32 at the track. That is within a hair of a stock x5m. |
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06-26-2018, 04:36 PM | #47 | |
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I generally do not follow BMWs maintenance schedule and perform oil changes at 1/2 the recommended interval. Any time you add power to an engine, you are putting more stress on the parts and fluids, thus a more frequent oil change interval should be considered. The forward driveshaft is the same as the X5M. The rear is different, but the difference is likely only length due to the fact that the X5M uses a different (electronic M) differential. Both utilize the ZF 8 speed automatic transmission, but they do have different suffix on the transmission part number, indicating some small difference. My guess is that the twisted driveshaft in the above picture is from a car making a lot more than Stage 1 HP. I wouldn't worry too much about the driveline of the X5. When I was doing some stock runs before installing the RC Ultimate, I saw boost pressures around 14psi. After the installation, I saw 15-16psi. That 2 psi was responsible for an easy 50hp & 50 ft/lbs. 14psi to 18psi isn't as crazy of an increase as 11.5 to 18.
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2015 F83 M4 Last edited by Rotzy; 06-26-2018 at 04:57 PM.. |
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06-26-2018, 05:06 PM | #48 | |
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2022 x5 m50i - Dravit grey
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06-26-2018, 06:21 PM | #49 | |
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Yeah, that particular X5 50i twisted his driveshaft due to traction control issues. What I think happened is TC/DSC applied brakes while engine was opposing it and pushing hard. That resulted in the weakest link - driveshaft twisting lol. I don't think that is common. I posted it just because it was kinda cool and it shows torque we are dealing with is no joke. Also, as Rotzy said that X5 had a lot more going on, it has turbos running on 24psi on jb4 + meth. It was on n54tech forum - I'll post a link if i find it. |
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06-26-2018, 06:26 PM | #50 |
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Ah, I see. That makes more sense to me. 14psi sounds about right. I took 11.5psi from a pdf that I found. The pdf can be wrong.
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06-27-2018, 10:34 AM | #52 | |
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06-27-2018, 12:02 PM | #53 | |
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Other than that, the Stg 1 tunes should be pretty straightforward. Some of us have upgraded to the X5M airfilters for $100 to supply more airflow. That is about it. |
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06-27-2018, 12:52 PM | #54 | |
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This is really not that different than a n55 6-cyl. engine. We just have 2 more plugs and 2 more coils |
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06-27-2018, 01:27 PM | #55 | |
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That Torque is impressive 50i https://www.getbmwparts.com/oem-part...ft-26107589129 X5M https://www.getbmwparts.com/oem-part...ft-26107850370
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06-27-2018, 03:21 PM | #56 | |
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Thanks |
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06-27-2018, 03:30 PM | #57 | |
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OEM designation part# is 12138647689 (also Bosch). I believe these are same coils, but designated differently. https://www.pelicanparts.com/More_In...-8-647-689-M14 https://www.fcpeuro.com/products/bmw...-12131712219x8 https://www.amazon.com/Bosch-0221504.../dp/B004AG9ILM |
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06-27-2018, 05:56 PM | #58 | ||
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06-27-2018, 06:57 PM | #59 | ||
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06-27-2018, 07:56 PM | #60 |
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06-27-2018, 08:45 PM | #62 |
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Speaking of oil, whats the recommendation for oil? I'm using liqui moly on my 335i and it's been great.
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06-27-2018, 09:50 PM | #63 | |
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Okay, Thanks for all these info. I'm not a handy man, so I probably will do all the maintenance work at dealer or indy shop. Now, let me get this straight. After tune, I should change plugs and coils together every 30k miles or just plugs itself? Will it be okay if I just run stock plugs instead of 1 step colder? Other maintenance like oil change 5-8k miles, transmission, transfer case, and differential oil change every 60k miles. Fuel filter and coolant should be life time? And injectors, hpfp and waste-gate wont be an issue after the tune, right? I'm a newbie with car modding, so please bear with me with dumb questions. Last edited by perry8912; 06-27-2018 at 10:03 PM.. |
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06-27-2018, 09:51 PM | #64 |
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There isn't just one. Many solid options available.
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06-28-2018, 07:22 AM | #65 | |
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I think 5-8k oil changes are fine (you can also just out of curiosity send your oil for analysis to blackstone labs - some people have done it and so far it looks like N63TU is holding very good, low chromium - so piston rings are excellent, etc). For the rest you need to follow maintenance schedule, but keep in mind you might want to be careful when going to dealer for maintenance: you'll need to flash back to stock at least (and possibly swap plugs to stock ones if you are going due to misfire, because if they will change plugs and see that you have X5M ones - you might get in trouble about warranty depending on the dealer). I would change ZF8 transmission every 60k for sure - because I don't believe in lifetime fluids and ZF itself recommends fluid/filter change. Fuel filter should be fine in US (gasoline quality is good). Coolant is a shady area - ideally you might want to change it at least at 100k. BMW coolant system is very good and tight, but coolant still looses it's qualities over time. Wastegate is fine on X5 50i - we have quite reliable turbos - failures due to wastegate are very rare (I haven't seen one so far). IMHO most important thing when you are tuned in 50i - is good fuel (91 octane sucks), good plugs/coils and timely oil changes. Everything else is not much different from any other car. If you live in hot climate like AZ or FL - I would think about either getting a E85 tune or installing a meth kit for cooling. There are also some other things available to prolong engine life like a cooler thermostat swap (the one that opens earlier and keeps lower temps) and/or downpipes - that will reduce exhaust temps that stock cats (catalytic converters) that are creating 1400F right in the middle of engine and slowly frying everything in engine: hoses become brittle, gaskets may leak, valve stems loose elasticity etc. However, downpipes will cause emission issues so it's not that popular, at least in US/Canada and especially for X5 50i - that is usually a family car for majority. In sum, just follow common sense, research and think twice before committing to some expensive mods, do timely maintenance and you should be fine in the long run. |
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06-28-2018, 09:58 AM | #66 |
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I just use the twin power 5/30 from the dealer, picked up some at Ridgefield BMW , it about $8 bucks a quart , you can probably find it cheaper on line.
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