03-12-2023, 09:13 PM | #1 |
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Actual HP
BMW is known for underrating horsepower. With that said, anyone ever dyno a 2022 X3/X4 and see if it is indeed 382HP at the crank? Or is it 400 as some say?
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03-12-2023, 09:31 PM | #3 |
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This is widely discussed and common knowledge with in the B58 community: ultimately, the B58 engine makes roughly their crank horsepower rating at the wheels. Not to shabby at all, no wonder everyone adores this powerful engine!
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03-13-2023, 01:53 AM | #6 |
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I surmise they do that for insurance purposes. Again, any vehicle over 400 horsepower is treated as a "muscle car" by insurance actuaries.
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03-13-2023, 02:12 AM | #7 | |
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Keefy1749.00 Nature_Ransacked16.50 |
03-13-2023, 03:13 AM | #8 |
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Do I have direct proof? No. Do I have people I know whom work as actuaries at insurance companies and set standards/price floors for tiered pricing based upon engine power output, yes. Every single one has stated ten years ago, 300 hp was a thresh hold mark. It has steadily crept up to 400 hp, due to newer technology and the simple fact there are 4 cylinder engines now making over 300 hp. Newer engines, especially those using the Chrysler/Stellantis 3.0 liter Inline 6, have a muscle car designation. I'd be willing to guarantee BMW went to great lengths to keep as many engines as possible outside of that category.
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03-13-2023, 03:34 AM | #10 |
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Let's face facts. It has nothing to do with safety, rather making money. There are a lot of "assumptions" made about people driving a "muscle car". Overly aggressive, speeding, getting tickets, causing car accidents, performing street takeovers and the list goes on. My insurance company heavily pushed for a monitoring service to get me a "discount". I tried it for two weeks and found the results were wildly inaccurate. When confronted, they admitted that there are bugs in the software and G-meter detector. That ended that experiment. They were nice enough to give me a 10% discount for the remainder of my 6 month policy.
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03-13-2023, 03:09 PM | #11 |
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Would anyone happen to know the realistic HP & torque figures for the M40d....long-shot I know as all you guys are in North America.....I feel the torque, it's insane, just wondered if the same BMW underrating of the figures would also apply to their diesel variants? I assume it would?
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03-13-2023, 05:49 PM | #12 | |
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03-13-2023, 08:28 PM | #13 |
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That's a good question. If I were betting, I'd say a tune would raise the horsepower to 420, but the torque would easily be over 600 lb-ft. Dinan says, "Up to 30 HP, 50 lb-ft of torque".
B57D30S0 2016–2020 294 kW (394 hp) at 4,400 rpm 760 N⋅m (561 lb⋅ft) at 2,000–3,000 rpm ---the new engine allows for 0-100kph in 5.6 seconds https://en.wikipedia.org/wiki/BMW_B57 |
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03-14-2023, 01:41 AM | #14 | |
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https://www.car.info/en-se/bmw/x3/x3...25478111/specs |
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03-14-2023, 02:09 AM | #15 |
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Lets face facts. You could add a bunch of updates and totally light up your tires with oodles of torque. But, is it really what you want? Plus, you have that pesky MOT testing. I can't see you passing testing, as NOx emissions would be affected. I agree, you have an awesome car. And, it is sad that diesel in passenger vehicles is all but dead in the USA.
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03-14-2023, 02:22 AM | #16 | |
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The MOT is also not done until year 3 over here, so I've got many many pleasurable miles to go before it goes through a routine MOT test that the car was designed to pass in the first place, so all good. Perhaps later on in its life if the car was poorly maintained etc with emissions, but I take care of my possessions especially a £65k car so I'm not worried at all if I'm honest. |
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03-14-2023, 02:39 AM | #18 |
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I did all the modifications thing in terms of engine and exhaust tuning in my last car, Golf R and had my fun, so I guess I'll be keeping my m40d relatively stock with some cosmetic changes to the exterior and my throttle response box but other than that, it'll remain standard as I want to keep the warranty
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03-14-2023, 03:13 AM | #19 |
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Has anyone actually tested a B58 in exactly the same way that BMW would have done? I'd be curious then to see how much BMW really under-reports its output.
I've heard this for years that BMW under-reports its engine output (b58, N54 engine and others).....but wondered why. In terms of marketing it doesn't make sense (and yes, I've also read that they don't want to show how close the M40's power is really to an X3M for example...) To me it would be very hard to say by 'feel' whether your engine is outputting more than spec. Too many variables. The stupid 'learning' throttle for example makes my M40 feel like a 3-legged dog sometimes, but at other times it feels much more powerful...
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03-14-2023, 03:18 AM | #20 |
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I think they under estimate the numbers for insurance purposes. As for testing, there have been a number of dyno videos on Youtube but nothing from an agency or car magazine...that i'm aware of.
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03-14-2023, 03:42 AM | #21 |
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A few interesting videos, obviously the OEM quoted figures and the dyno figures will always differ due to ambient temp, type of dyno used, fuel load and spec, weight, age of the vehicles used, in fact there are so many variables its hard to compare really, and we don't know how the OEM's are testing their vehicles but interesting videos none the less.
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03-14-2023, 05:39 AM | #22 |
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https://bimmerlife.com/2020/05/16/re...an-advertised/
https://www.bmwblog.com/2019/09/19/u...und%20381%20HP. 2 articles showing the actual dyno wheel HP of the B58 engine is in the 380-390 range. So the 382 BMW number does appear to be wheel HP not crank. Well over 400HP at the crank, 425-440. |
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