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05-23-2013, 11:18 AM | #111 | |
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Not sure what the new M3 will do, but it could possibly be below 200 gr/KM, and as a result the road tax here, that exponentially raises with the CO2 emission, would make a huge difference in V8 NA vs I6 turbo. (as in 250$ per month, as in 15.000$ on a 5 year lease) This is one of the reasons for the downsizing in the car industry. |
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05-23-2013, 11:43 AM | #112 | |
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05-23-2013, 01:20 PM | #113 | |
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05-23-2013, 01:25 PM | #114 | |
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05-23-2013, 01:30 PM | #115 | |
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05-23-2013, 02:08 PM | #116 | |
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S65 |
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05-23-2013, 02:34 PM | #118 | ||
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2 x N54 -> 1 x N55 -> 1 x S55-> 1 x B58
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05-23-2013, 03:15 PM | #119 |
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We haven't heard anything in a while, but one of the more curious aspects of the S55, is whether or not M will introduce a third electric turbo. That should ensure the engine has NA like responsiveness.
BMW has tri-turbo cars in their fleet today, so they've certainly had some time to figure out and optimize the plumbing. |
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05-23-2013, 04:15 PM | #120 |
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05-23-2013, 04:36 PM | #121 |
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I had been hoping for 7500-8000 RPM redline and I'm glad to hear that will actually happen. I do wonder though where the power falls off. In the M5, HP is virtually flat past 5500 rpms while torque falls off as expected. There isn't really an advantage going beyond 6k rpms based solely on a dyno plot. So I'm hoping that if the M3 has say a 7900 rpm redline, will it actually be useable? Will the driver want to take it to 7900?
So lets say that yes, it's useable and power peaks at like 7800. This would be best accomplished with a BIG turbo. I've said it before but I could totally see a so called "tri" turbo system that incorporates a twinscroll for decreased lag and mid range power and a larger turbo to carry the big HP numbers to redline. I would be very surprised if there is an electric turbo but that would be pretty fantastic. Also, the S55 absolutely has to have fully forged internals. If they're pushing 8k rpms and hopefully they care about carrying boost to near redline, this better be one stout engine, and cooling better be something very special. For all those hoping to tune this one to 600HP, I say good luck it's going to be at near max capacity as it is when it comes down to cooling and what a 3.0L can handle. |
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05-23-2013, 04:43 PM | #122 | |
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http://f80.bimmerpost.com/forums/sho...d.php?t=597327
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President, National Capital Chapter (MD/DC/NoVA) Director, National Events ///M Chapter Become a BMW CCA member; Click HERE to join and use my member #339225 for a referral Join our NCC Facebook Page |
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05-23-2013, 04:43 PM | #123 |
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If you listen to the latest footage from the ring where you have an E90 M3 leading the way of a train of turbo cars, the F10 M5, Panny S V6 TT and an F80 you can hear how crappy the FIs sound in comparison and you can also hear how the F80 is short shifted which would indicate that it makes optimal power like most FIs in the midrange.
I'm convinced that the F80 will not sound as good and not pull so hard towards the redline. It will be different but still very good. I hope for a nice muted growl, minimum lag and an ability to hold power towards the redline + the fat FI midrange. If that's what we will get I'm fine with that. Not as awesome as the S65 in many ways but good enough and frankly all what we can expect from FI. |
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05-23-2013, 05:18 PM | #124 |
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It was 3 sentences. Americans shouldn't complain about the move from a 8-cyl to a 6, because bmw never was about v8s. The s65 is a very nice sounding engine. But it is way to slow and way to inefficient. You could always buy a camaro, because there is no point in whining about something that's gonna happen regardless if you like the s65. The next m4 is gonna make the m3 look outdated in every way.
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05-23-2013, 07:26 PM | #125 | |
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In addition, BMWs are historically known to breathe well on the top end,(rpm). I think this "electric assist" setup will allow this to be the case in the new M3/4 turbo motor. I think we're getting ready to see something very different in turbo charging..... |
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05-23-2013, 08:15 PM | #127 | |
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Without getting in to the engineering and science behind the engine, can somebody explain why a 7700 RPM redline or a 6000 RPM redline matter if the car is making the same power at the lower point and indeed making more torque? I know the beauty of a NA engine is that the power keeps rising all the way (or very very close) to the limiter but in FI that's not the case and we know the new M3/M4 will be FI. Thanks
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05-23-2013, 08:19 PM | #128 | |
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Lastly, "bmw never was about v8s". Not sure where to go here, but keep in mind the first M3 had an I4. If you think BMW isn't capable of deviating from an I6, take a look at the M70 |
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05-23-2013, 08:36 PM | #129 | |
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Makes you wonder why BMW keeps bringing that E90 M3/CRT on the 'Ring....difficulties in getting the new car to out-perform the old??
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05-23-2013, 09:02 PM | #130 |
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It's what I would do. Drive them back to back between a couple of drivers and compare notes. Any perceived weakness in the new car should be reported and worked on. And yes, to put one of best drivers in the old M3 and have a lesser driver chase him down in the new one is a cool test
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05-23-2013, 09:51 PM | #131 |
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05-23-2013, 10:04 PM | #132 |
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If the S55 is basically the same as the N55 engine, then is the bore x stroke the same as well? If so, mind if I ask about the rod:stroke ratio of the N55 engine?
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