04-08-2016, 10:06 AM | #23 | |
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Anyhow I'm quite surprised at the JB'd crank figure,thought they always put out more than that. |
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04-08-2016, 10:16 AM | #24 | |
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My initial figures are probably a good 5-10% out owing to the tyres alone. Pretty much all of the m135i/m235i's they dyno hit near 330hp crank and 330 lb-ft crank stock. |
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04-08-2016, 10:36 AM | #25 |
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TFL can't test cars for shit. They literally have no fucking clue what they are doing.
The turbo should correct for the altitude, however they are running shit gas so the car is pulling the timing like crazy to protect the engine. Run proper 93 octane and do a proper pull and I think you'd see a realistic number. As was said as well, without other car results from that dyno to calibrate against it the numbers are relatively meaningless.
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04-08-2016, 10:46 AM | #27 | |||
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04-08-2016, 11:54 AM | #28 |
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I know maybe they did a lot of things wrong and I'm not a dyno expert but 93 vs 91 octane wouldn't make that much difference IMO. 287 is a very disappointing number. I'd really like to see what other cars are rates on that dyno.
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04-08-2016, 12:31 PM | #30 | |
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Considering that this car is making far less than what M235i's and 335's produce, do you honestly think the M2 is realistically producing less power than a stock production N55 engine?
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04-08-2016, 12:42 PM | #31 | |
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On the 91 vs 93 octane subject, so are you saying that if two identical cars were to let's say drag race (one with 91 and the other with 93 octane), the one with 93 octane would win by a noticable margin? In other words, would going from 91 to 93 result more than 10hp advantage? |
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04-08-2016, 12:43 PM | #32 |
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Who cares about 1 dyno run. It's keeping up with really fast cars on the track. The 0-60 time is great. People love to post controversial crap on youtube just to get the clicks. Why on earth would you run the car on that gas to do a dyno test?
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04-08-2016, 12:59 PM | #33 | |
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Remember its the engine having to protect itself from detonation.
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04-08-2016, 02:01 PM | #34 | ||
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04-08-2016, 03:24 PM | #35 |
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04-08-2016, 04:14 PM | #36 |
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Just whack it on an inertia dyno; that'll tell you what you want to hear if numbers are your game. Problem solved. I mean why would a resistance cell dyno that simulates road loads be anymore accurate for tuning? Thats the whole point of these things to provide a good tuning platform, not for determining if its making factory horsepower or not.
At the end of the day standalone peak dyno numbers mean very little. You only want to use them for tuning the car after establishing a baseline run. As long as it drives well and performs well real world, who cares? |
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04-08-2016, 06:14 PM | #39 |
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As far as i know, the Dyno Dynamics can be adjusted to account for any gear ratio the operator choses and adjust accordingly. Doesn't have to be 1:1
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04-08-2016, 06:53 PM | #40 |
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04-08-2016, 07:04 PM | #41 |
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You can see from the graph that something with that car isn't right. That dip in the HP line tells you the timing is being retarded, hopefully because of shitty gas and not heat soak.
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04-08-2016, 08:09 PM | #43 |
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M4 has 425hp on paper and has 425whp on dyno. I don't understand why people are expecting around 300whp for M2. Obviously, no one is buying these cars for their dyno results but I still think M2 should have received the same treatment from BMW as for other M and Non-M models. 340i has 320 claimed hp and it does put down 320hp on dyno as well. 287 vs 370 is a huge difference. It actually means that M2 is underpowered compared to M235i. I know they used 91 octane etc but still I cannot justify the difference.
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04-08-2016, 08:25 PM | #44 |
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I am going to ask a dumb or perhaps what should be an obvious questions here...
when has an N55 ever dyno'd its crank hp numbers? Or better yet, when has an N55 ever impressed at the dyno? Low and behold, i think people are still forgetting that while this is an M car, it still has an N55. |
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