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11-17-2015, 05:20 PM | #23 | |
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So if this is whp on a stock auto N51, someone has played with the correction parameters! |
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11-17-2015, 05:40 PM | #24 | |
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This dyno was meant to be my before. When I get a tune and if/when I get headers I will either be back here or I will do a new before/after elsewhere. |
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11-17-2015, 06:02 PM | #25 | |
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As for the numbers, it is very well a possibility that this shop applies a greater correction factor to better match their results to a dynojet. From what I understand Mustang Dyno's are SAE corrected. You'll see "engine power" and "T WC" on the mustang dyno's posted on E90 post as well... Again, could be that they fudge the correction factor up a bit. Last edited by bNks334; 11-17-2015 at 06:39 PM.. |
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11-17-2015, 06:42 PM | #26 |
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The reason lighter wheels give you more WHP is because the motor does the same amount of work rolling the dyno rollers at WOT during a full pull but will accomplish it in a slightly shorter time since the wheels are less of an obstacle to spinning up. Power is work over time.
The whole problem with you not having a baseline, let alone with same conditions, is because dynos readouts are all over the place even for identical cars, so you have no way of knowing if this one just reads high for your car or what. The absolute numbers on pretty much any dyno you'll find in a tuning shop are guaranteed not to be that accurate. That's why the proper thing to do is look at relative results from the same dyno, and hopefully similar conditions. |
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11-17-2015, 06:55 PM | #27 | |
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11-17-2015, 06:59 PM | #28 | |
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11-17-2015, 07:29 PM | #29 |
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Mustang dynos always say T Engine Pwr / T Engine Trq. The WC at the end means the OP's dyno has a weather correction factor applied to it. You can read the manual for the dyno yourself by google mustang dyno user manual.
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11-17-2015, 08:44 PM | #30 |
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Thanks for verifying what WC means. I think it's a given that dyno results are corrected to present an apples to apples comparison though. If anything correction would've actually brought my numbers downward since the weather conditions were greater than ideal at a cool 55-60 degrees. Unless, again, the correction factor was fudged a bit (it's a moot point since this is my baseline). Tell that to the N54/N55 guys though and they will be even more upset about their numbers lol.
Can you also verify that WC means SAE? I was reading that a mustang dyno is always SAE corrected? Last edited by bNks334; 11-17-2015 at 08:55 PM.. |
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11-17-2015, 08:57 PM | #31 | |
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11-18-2015, 06:34 AM | #32 | ||
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11-18-2015, 09:45 AM | #33 | |
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People are speculating on why my numbers came back so high on a mustang dyno, and I am just merely trying help by pointing out that a lot of the numbers people are comparing to have different setups such as intake, wheels, fuel, and condition. All these things are definitely factors despite you trying to minimize them. So, lets to try to keep things factual. This chart reflects WHP, and weather correction is pretty much standard for every graph posted on these forums with the exception of a few "real world" graphs, so that is a moot point. What I still want to know for my own personal knowledge is whether or not WC = SAE as I have read that a Mustang dyno only uses SAE correction. SAE correction is standard and the machine measures out the temperature and barometric pressure to calculate the correction factor. |
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11-18-2015, 09:53 AM | #34 |
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That is something I had not thought of until you mentioned it! I did get the car with 8 months/8k miles on it. My SA had my ecu updated to the latest software 2 times since I've had the car. Any tune present would've been overwritten.
Last edited by bNks334; 11-18-2015 at 09:58 AM.. |
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11-18-2015, 12:34 PM | #35 |
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ITT, people who have never used a dyno trying to shit on OPs results.
I've seen Mustangs read on par with Dynojets and below it, and I've seen a few automatic E90s (my Stock n52) make over 200whp. Why are people who have no experience, no real basis of comparison so vocal? |
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11-18-2015, 03:11 PM | #36 |
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The Mustang can use any correction factor it's programmed for. By default WC should be SAE.
All the bitching about no baseline is because if the OP had a baseline then we'd be a lot closer to knowing the full story. Without one it's anybody's guess how much power he gained. |
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11-18-2015, 03:32 PM | #37 |
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IMHO, with just a Euro intake, the BMWPE and no claim of a tune, this IS the baseline.
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11-18-2015, 03:45 PM | #38 | |
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The only other comment was that the car looked quite strong for what it is, so there was some discussion on WHP vs crank, but either way this is a baseline and it will be interesting to see the results of the planned mods. |
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11-18-2015, 08:39 PM | #40 |
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11-19-2015, 11:32 PM | #41 |
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Has anyone seen before and after dynos where the only change was lighter wheels? I'd be interested to see what the gains actually are. My baseline dyno was with 6-7kg per corner lighter wheels than the stock 18 inch 261s and I have wondered what the true stock reading would have been.
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