03-27-2019, 09:20 PM | #67 | |
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Couple options I can think of: - See if there is any fine print or anything that might let you return the car to the place you bought it from. - Take the chance. Try to find any 2014+ N55 (previous N55's have PWGs, so I don't think they will work) then pray that everything goes smoothly and works out with the swap. There are some N55s on ebay australia for sub $7000AU - Swap the motor and transmission for a small block chevy LS or similar. Gut the car and turn it into a "race car" Sell the M2 transmission, dash, computers, airbags, whatever else won't work to a junkyard to recoup some money. - Cut your losses ASAP. Don't do any engine swap and just sell the car to a junkyard. I know there are some exotic junkyard that might give you more money for it. Shop around and see who gives you the best price. Might be worth it to ship the car to a junkyard if they give you more than anyone local. - Hold onto the M2 in hopes of another salvage one popping up with a good engine. |
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03-28-2019, 06:37 AM | #68 | |
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So would me buying a 2016 model M135i motor bare block , if I remove my turbo , inlet manifold, and oil sump , etc bolt and and should do ? there is one for sale he's asking $3000 which I could live with at least the car will drive and not go to complete waste, for the next guy to buy it on the presumption at auction that it might be just a little issue only to find out he has a blown motor is pretty slack so I won't be doing that, will it work or am I taking risks and gambles her, with unknown outcomes? From what I have learnt that the motors are exactly the same with different oil pan, turbo, and inlet manifolds , also the internals are forged for track (harder driving, and more boost etc) |
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03-28-2019, 08:59 AM | #69 |
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Just LS swap the damm thing, lol.
What you're doing is pretty risky from my pov. Tuning, reliability, driveability... too many things to consider with a one-off setup like this. But that's just me. S |
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03-28-2019, 09:02 AM | #70 |
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Is the idea for a swap based upon wanting a cool project? Just to see if you can do it?
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Past rides: 2016 981 BGTS, 2020 MINI JCW, 2017 F80, 2015 981 CS, 2014 F22 235, 2011 E82 135, 2008 E82 135, 2007 E92 328, 2007 E92 328 (My lady drives an OG M2. So does my dad)
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03-28-2019, 09:12 AM | #71 | ||
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Me and a buddy tried to get into the business of buying salvage auction cars to fix back and sell for profit - we took a loss on all of them. The funniest vehicle was a new Acura TSX that had a shell of a motor but nothing inside the block, empty. The second one had a bent frame and could never be aligned properly. Lesson learned. Unless you own a show where you can save on the labor and discounted parts, you're going to be in the red after everything is said and done. |
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03-28-2019, 09:37 AM | #72 | |
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03-28-2019, 09:45 AM | #73 | |
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03-28-2019, 10:22 AM | #74 |
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The only internal mechanical difference between the M235i and M2's N55 is the M2 uses the S55 pistons and the crankshaft bearings.
Everything else seems to be identical to the N55 from the 235i. Never heard of any highly tuned standard N55 blowing pistons or crankshaft bearings, so its necessity is debatably. Good read below from page 23.. https://www.bimmerpost.com/goodiesfo...l-training.pdf |
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03-28-2019, 10:57 AM | #75 | |
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03-28-2019, 11:17 AM | #76 | ||
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I did a Google search and I did not find any failures for those parts, with any other variants of the N55. Even the N55 HP version of the N55 which is in the X4 and 740i uses the standard hardware (non S55). A lot of failures for charge pipe, turbo for highly tune vehicles, and water pumps no but no pistons or bearings for the N55. I guess they figured the M2 is a vehicle is that's more than likely going to dogged at the track and which is pushing more power, including the short spike in Overboost, so they threw in the stronger pistons and bearings, for good measure. Whether the stock N55 pistons could survive being reliably pushed to the M2's level of power, is still unknown. Longevity and reliability are hard to assess with these motors, in all variants : The gauges in the iDrive does go all the way up to 400hp/tq, I always took that as unofficial sign of what the N55 could reliable push. https://en.m.wikipedia.org/wiki/BMW_N55 |
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03-28-2019, 12:18 PM | #77 | |
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03-28-2019, 02:32 PM | #78 | |
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I mean he could always get a custom tune to put it at m235i power levels and boost targets. |
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03-28-2019, 03:17 PM | #79 | ||
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But the whole project and end results seems questionable, unless he considers if a hobby car and not an official M2. |
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03-28-2019, 03:35 PM | #80 |
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03-30-2019, 05:43 AM | #81 |
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I haven't even started to strip down my motor to see how bad it actually is, I do know that someone tested it and told me that only cylinder one has 180psi compression and the rest have between 50-80psi on this presumption the motor needs to be rebuilt or replaced.
I cant find an M2 motor anywhere and if I did it would be $15,000 minimum which is not pocket change to anyone! I am able to source many standard N55 motors and also a few out of M135i which is why I am looking at doing this to resolve my issue, it isn't a project I am trying to experiment, or a "can one put a 135i motor into an M2" anyone can put any motor into any car realistically. I want to know if it will be a situation where it would all bolt up and "plug and play so to speak", or will I be ripping apart my motor and only using the internals from the M135i motor? and "will they fit?" I dont want to put in parts then turn the motor over to hear crunch , crack and kaboom! and be back at the same place I am today to have to start all over again! , and I also dont want to put the car into the auction "As it is" and some poor bloke comes along thinking ah the motor isn't starting "maybe just a relay or fuse". I want to get the car back up and running but not have to spend $20,000. I also bought the car as it is, and it was driving and then one day it just turned off, the oil had run out of the oil cooler for about 2 minutes at most and never turned back on after that moment. :'( |
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03-30-2019, 10:29 AM | #82 | |
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OP, you can swap the block over (use an M235i or X40i) and swap all the sensors, oil pan and pick up, and turbo and turbo manifold. |
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03-30-2019, 11:01 AM | #83 |
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The pistons appear to be the only M2-specific parts, with the rest being common with other models with N and S engines
Although the block doesn't appear to be available separately for the M2. |
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03-30-2019, 01:44 PM | #85 | |
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03-30-2019, 09:47 PM | #86 | |
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That helps with faster reviving, however a heavy flywheel is better for inertia (better street driving). For the record, it was established when the M2 came out that it doesn't have a unique turbo; it was the same unit from the F30 335i. https://www.bimmerpost.com/forums/sh...php?p=21257468 Did you manually make the comparisons or you searched an easier way? |
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03-30-2019, 10:21 PM | #87 | |
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M2 http://www.realoem.com/bmw/enUS/part?id=1J52-EUR-07-2017-F87N-BMW-M2&mg=11&sg=50&diagId=11_6677&q=11658053153 335i http://www.realoem.com/bmw/enUS/part?id=3A92-EUR-06-2015-F30-BMW-335i&mg=11&sg=50&diagId=11_4473&q=11657643115 http://www.realoem.com/bmw/enUS/showparts?id=3A93-USA-11-2011-F30-BMW-335i&diagId=11_6463 Even looking at logs alone you can see the M2 turbo flows better over the regular n55s |
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03-30-2019, 11:03 PM | #88 | ||
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Right before the M2 was released, there were a couple of discussions on the discrepancies of the motor (open or close block) and the turbo. It was established that the M2 had the turbo from the N55 335i (not the 235i) and the blowoff valve from the N20. At the time, RealOEM verified this factual data. Since then, they removed this cross-reference to the turbo with the 335i What's the point anyway? It's the same dimension; shell and wheel, as all the standard N55s turbos, so it makes no difference in potential power output or efficiency. What logs of 'better flow' are you referring to? The M2 might be pushing more boost but that only because it's tune that way, not because of any mechanical enhancement of the turbo. |
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