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01-11-2010, 07:46 PM | #67 |
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It also has Halogens and no Adaptive Xenons. I thought ALL 135's came with AHL.
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01-11-2010, 08:00 PM | #68 | |
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There is NO reason to think the N55 is not as powerful as the N54 while also being more efficient. It's been tuned to give these benefits. To me this is the first TRUE modern BMW turbo engine as it incorporates more of BMW's modern engine design than the N54, which is basically the E46 era block with 2 turbo's designed onto it. And what's with this BS about it being "cheaper"? That just reads like someone who's trying to win an argument by making a person insult that isn't true. A twin scroll turbo design is higher tech than a basic small turbo, which is what we have in the N54. The engine is lighter overall due to not needing all the added plumbing the basic little turbos require. The N55 does require a more sophisticated and better designed exhaust manifold to be able to properly feed a twin scroll turbo. And finally, the N55 is going to have a very high tech and costly valvetronic system. How does all that translate to "cheap or cheaper"? And when in the world of auto performance is lighter weight considered a bad thing? You make it seems as if the older tech and heavier N54 is "better" due to those things. Well, I don't agree. Yet another reason why leasing is a beautiful thing. 2 years from now the N55 will have it's wrinkles ironed out, then, come to daddy. Last edited by RPM90; 01-11-2010 at 08:18 PM.. |
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01-11-2010, 08:07 PM | #69 |
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To be honest I was a bit confused too. My current understanding is that all 35 models will get N55 with basically the same numbers the N54 put out and probably a bit better fuel efficiency. BMW will introduce new range topping is models like the Z4is, 335is and I have a feeling the M1 with a tweaked- 335hp tuned N54. If I'm wrong, I'd appreciate someone in the know shedding light.
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01-11-2010, 08:12 PM | #70 | |
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I know....when current 135i TT owners feel like the new engine shouldn't be better than what they already have. Even if the costs are about equal, which is probably more true, the N55 delivers the same power with slightly better low rpm torque and higher rpm torque, though it's small, it's there. Stock for stock, the N55 gets the nod. Better fuel economy? N55 gets it again. Lighter weight up front means better overall handling. N55 again. What is exactly better about the N54 vs the N55? Please don't give the very American answer, "It's got MORE turbo's!" As far as tuning, other than the pro tuners, we just don't know yet. But, more importantly, most owners don't tune these cars, so it's more important what stock performance can deliver. A legit concern is whether or not the promise of the N55 will deliver in the 1. For that, we'll have to stay tuned. |
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01-11-2010, 08:22 PM | #71 | ||||||||
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It has a more advance engine block, more electronics - the N55 is definitely going to be more expensive to develop. I believe the N54 going to the more expensive models are only the uprated versions with larger intercooler, fan and more HP. Quote:
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As someone was saying before, if it is going to be a twinscroll twin turbo for the current series M1, it would be very interesting how they would route 4 pipes into 6 cylinders. I would say the easiest option is have a standard TT setup. What might be interesting would be the ///M1 for the next redesign - a twinscroll, twin turbo on a four banger would means each cylinder has its own exhaust. With a much lighter engine... thinking about it, that might not be that bad afterall.
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01-11-2010, 08:37 PM | #72 |
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Hey RPM- never said it was a bad thing- my assumption is its saving them money- maybe not but I bet its not costing them more. The R&D costs for valvetronic tech are long in the past- it debuted in 2001 btw. They did evidently have to develop a new compact version of valvetronic to work in conjunction with the direct injected engine. I'm not a current TT owner- no axe to grind or pride to stroke. Having not yet driven the N55 endowed 1er vs. N54 I can't say what will be better or worse about it. My guess is that the N55 while weighing less, burning less gas will display more lag. If not maybe I'll consider one next time around- or will it be the M1
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01-11-2010, 08:57 PM | #73 |
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Well, my 6-week-old N54 2010 135i has gone the way of the dodo, and has a shortened model year to boot. Kind of reminds me of EXACTLY what happened with my 2004 RSX-S, one model year before that engine got tweaked.
Anyway, how do I feel -- pretty good, I got the deal of the century on my 2010, I love it, it loves me, and I knew it wouldn't be the newest model forever. This is a bit sooner than I was expecting, but, I can always through JB+ or BMW Performance Power on this thing, edge out a stock 2011, and still feel good about myself. |
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01-11-2010, 11:18 PM | #75 |
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I wish BMW addresses that sharp torque decline after 5000. It's like heaven before 5,000 then car feels like someone dropped an anchor yet there's still 2000 more rpm before redline.
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01-11-2010, 11:31 PM | #76 | |
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Sorry but I disagree with you. A turbocharger is a very simple device, it has one or two moving parts including the wastegate, and is a technology that is tried and true and has been around for years. Mitsubishi turbos are probably cranked out of the factory with no hiccup. Valvetronic is a complex NEW system, therefore QC (quality control) over every surface, every finish, every mechanism is now scrutinized much more intensively to try and keep it a success. I dont have data either, but I have experience designing turbomachinery for a living as a mechanical engineer. And a turbocharger can be made cheaply with todays process. Valvetronic on the other hand, that is an impressive peice of machine, not cheap either. BMW probably pays more for the N55, they offsett his cost by cutting costs elsewhere, they just wont tell you exactly where. Thats whats going on.
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01-12-2010, 12:53 AM | #77 |
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BMW have been building valvetronic engines for years. It is not new technology except for its introduction in the USA.
I bought a valvetronic engined BMW over 7 years ago.
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01-12-2010, 01:30 AM | #78 |
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01-12-2010, 04:47 AM | #80 |
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If valvetronic is related to VANOS and I think it is, you don't want it in your car. Just take a look at the E46 M3 forums to learn about the $4 to $5K VANOS failures that are popping up all over the place. I have an '04 M3 with 29K miles and already got a VANOS failure code. These do not show up as early as the HPFP issues, but will also be a cause for worries...
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01-12-2010, 05:40 AM | #81 |
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01-12-2010, 05:41 AM | #82 |
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Check the following links -
http://en.wikipedia.org/wiki/VANOS http://en.wikipedia.org/wiki/Valvetronic
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01-12-2010, 07:15 AM | #83 | |
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Chris, the M1 is a 1er "send-off." It will go on sale right beside an all-new designed 1 coupe. Just as the E46 M3 did with the E92 3er's.
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01-12-2010, 09:23 AM | #84 | |
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Since when does a company release a new engine for a vehicle line with LESS or the same HP? We all know the N54 was under-rated at 306hp. The N55 is 300 and supposedly closer to spec too? Heck 15% is the norm on any new engine replacing another. N55 = COST SAVINGS FOR BMW with one turbo in the 1 series application. |
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01-12-2010, 09:58 AM | #85 |
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It seems to me that the engine has less to do with BMW saving money by reducing the number of turbos, and more with them trying to meet CAFE standards. BMW is trying to save money by meeting CAFE standards. When a car company fails to meet mileage standards for the their entire fleet of vehicles, I'm pretty sure they end up having to pay a penalty on a per car basis. Porsche for instance, has paid this "tax" $4.6 million in 2007 because their model range did not meet CAFE standards. BMW sells far more cars than Porsche and could get hit by a much larger tax as CAFE standards increase.
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01-12-2010, 10:44 AM | #86 | |
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http://www.bmwusa.com/Standard/Conte...fications.aspx
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01-12-2010, 11:01 AM | #87 |
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Valvetronic- impressive or not is nearly decade old technology.
They did have to adapt it to be more compact to fit in the N55's head. http://en.wikipedia.org/wiki/Valvetronic
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01-12-2010, 12:28 PM | #88 | |
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Oasis....I think what BMWzone was saying is that it is well known here that the N54 really makes more than 300hp even in stock trim. Meaning that BMW purposely underrated the N54 engine. Believe he is speculating that the N55 may be rated at an actual 300hp, thus potentially a lower hp engine than the N54. However, until we get an N54 and an N55 on an independent dyno, this is all just lunchtime conjecture. |
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