07-30-2018, 07:14 PM | #45 | |
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"When the Z4 M40i hits our shores, power is an M2-beating 382 hp and 369 lb-ft of torque, surprisingly more than the Euro-spec, which is choked by a particulate filter that saps the sixer by around 50 hp."I just found it interesting that they would tell reviewers this now since it's a prototype and they still have time to remedy the difference if that's at all possible. Yes, the unveil is happening next month at Pebble Beach, but I would think they still have time to deal with purely mechanical issues. Just speculating, but perhaps they can't tune B58 up enough to compensate for the filter. I think euro M2C owners are actually fortunate that hp is same as US spec given Z4 situation. |
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07-30-2018, 09:54 PM | #46 | |
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These filters must be very restrictive as to rob 50hp. I'm not totally convinced the Euro version M2C is same ratings as US version. Only an independent dyno will be able to verify that. If the particulate filter robs 50hp on B58, imagine what two filters are doing to the S55 and the state of tune it would have to have to overcome it. |
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07-31-2018, 03:29 AM | #47 | ||
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It doesn't because it is fast and you can see that in your speedo, but you have fast and experiencing fast. It just feels to me that they they properly had to differ the car to differentiate it from a M4 and meet emission regulations. Call it less fun to drive than a M2. While with that engine it should be a freaking blast. MR |
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07-31-2018, 04:56 AM | #48 |
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Moreover, high air temperature may have affected the performance of the engine, you should try again the car with less than 37°C
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07-31-2018, 08:25 AM | #49 |
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So is it 100% confirmed that the US cars don't have the OPF at this point? I can't wait for someone to be able to dyno these cars for comparison
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07-31-2018, 08:39 AM | #50 | |
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Look at the engine certification executive order. No GPF is listed under ‘special features and emission control systems’. https://www.arb.ca.gov/msprog/onroad...3d0_u3-125.pdf |
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07-31-2018, 07:06 PM | #51 |
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So does anyone know if Australian delivered vehicles will have the OPF? Several of the articles say that cars for the US and Asia do not have OPF. However, I assume Australian delivered vehicles will have it as they will as they are the EURO model (2U72) in saying that from what I can see cars going anywhere outside of the US are the EUR 2U71 or 2U72 model.
So my question is, is the OPF and associated tune part of the model code (2U71, 2U72, 2U73) or do we think it is being added by the region specific options such as "L810A National version Australia" or whatever the region option is for European countries. |
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07-31-2018, 08:31 PM | #52 | |
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07-31-2018, 09:02 PM | #53 |
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I think they are aiming for the power at the wheel to be about the same so the Euro version the crank HP will be higher to compensate for the OPF reducing HP. The US version has a lower state of tune because it doesn't come with the OPF. The results is similar wheel horse power, in theory. However the cars might still differ in responsiveness and sound?
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07-31-2018, 09:37 PM | #54 | |
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Now they are onto it again with this noise and OPF thing... |
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07-31-2018, 11:11 PM | #55 | |
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I find it ironic that the OPF is only needed because of direct injection which came about because of pressure to increase efficiency. I don't think diesel has any place for passenger cars, though. |
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08-01-2018, 01:45 AM | #56 | |
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MR |
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08-01-2018, 02:13 AM | #57 |
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Everybody is talking about the car is beeing hold back... I have not driven it for sure, but guys - do not forget that you have driven it 35-36°C according to the videos. That is a LOT HOT! If not anything alse - there is a huge difference in air desity so the turbocharged engine never can perform that well in terms of Nm and hp. It is huge difference 20 or 35°C.
I would have wait until somebody drives it in standard conditions. |
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08-01-2018, 02:15 AM | #58 | |
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Modern IC engines are actually very clean and someone smart did a calculation stating that an ICE actually develops less overall pollution than an EV once pollutions from the Power station is taken into consideration. Therefore those environmental nutters should put more effort in phasing out those old beaters running with an inefficient engine instead. |
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08-01-2018, 02:20 AM | #59 | |
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08-01-2018, 02:26 AM | #60 | |
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08-01-2018, 02:26 AM | #61 |
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08-01-2018, 03:35 AM | #62 |
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08-01-2018, 03:39 AM | #63 | |
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08-01-2018, 03:56 AM | #64 | |
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08-01-2018, 05:01 AM | #65 | |
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Merkel, Macron and Juncker are more like little Obamas and Castros if you ask me And the OPF can literally be cut out and replaced by an OPF less midpipe. Cheers Robin |
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