02-19-2019, 06:50 PM | #45 | |
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Click Me The part about steady-state vs inertial dynos gives a great feel for why the types may read differently. But...to your question, assuming Dyno 1 and Dyno 2 are identical makes and models, there are still enough variables caused by the operator's setup, environment, tie-down, etc to cause a few % variation. 3% variation doesn't sound like much, but that's ~15hp in our case |
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02-19-2019, 06:53 PM | #46 |
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02-19-2019, 06:54 PM | #47 |
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looks like 5th gear should've been used based on the gear ratios...
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02-19-2019, 07:06 PM | #48 |
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I agree that it's best to try to get as close to 1:1 gear ratios as possible but when it's 95 degrees and the dyno facility doesn't have adequate cooling, then heat soaking when doing multiple runs can skew the data significantly (which might have actually happened in this case even in 4th gear).
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02-19-2019, 07:46 PM | #49 |
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Every dyno is set up differently. Peak HP/tq on dyno runs doesn't mean much. What's important is how much you gain from a tune or other mods, aka the delta between baseline vs tuned/ modified state (area under the curve). In this case, the gain from the CS map is inline with the advertised power difference between M2C and M3/M4 CS.
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02-20-2019, 09:12 AM | #50 | |
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02-21-2019, 08:01 AM | #51 |
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OP, your numbers are legit.
I know dynojet and I put many enough F series M cars on dynojet. I'm positive the F80/82 stock numbers this forum are seeing are stupidly inflated. Also, sorry guys S55 is not going to make a true 500whp from dynojet with a tune only, any tune, not even close. One thing that is true though is when you don't have very good octane, you won't be gaining much going more aggressive. It's the Octane that allows for the aggressiveness. Without hardware upgrade (there is hardly any outside of meth/ethanol for S55 tbh, again octane), factory tune yields the most consistent results. Let me tell you in your case CS is the best choice, not even the CS+. You log you'll know how much more boost STG1 have over the CS up top, only to gain 10+whp in your case. And imagine for yourself how much is there left for the CS+. One step further, you dyno STG2 you'll probably have less power than STG1. These boost are a waste without octane and makes just heat. If you have the log I can tell you more. I know these stuffs. Always remember S55 is not as tunable as vendor wants you to believe, no mention of those innocent fanboys. They just buy vendor published numbers and are too smart to believe independent results.
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02-21-2019, 01:27 PM | #52 | |
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02-21-2019, 03:08 PM | #53 | |
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02-21-2019, 07:50 PM | #54 | |
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Truth be told, MT is not an option with any BMW in my market. I can't tell anything with first hand. Compared to ZCP, CS has some extra 2 pound of boost at middle range and a lot of more timing at top end and slightly different post and pre throttle boost control. I'm not 100% positive if or not these changes have issues with MT, but I tend to believe they do not.
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02-22-2019, 09:08 PM | #55 | ||
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I may also test the CS+ and the GTS maps to complete the stock hardware map comparisons. |
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02-22-2019, 10:21 PM | #56 | |||
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02-23-2019, 02:36 PM | #57 |
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02-23-2019: Stage 0+ CS and Stage 1 Dyno Results:
100% stock hardware with no physical mods 93 Octane Three medium fans with one directly in front of the intercooler Closed hood I tested the car in a different shop that has a better Dyno facility. Still suboptimal testing conditions of 88+ degrees and high humidity but better cooling fans this time. CS Map (full adaptation): 428.54 WHP 436.05 WTQ Stage 1 Map (only two pulls of adaptation): 464.63 WHP 498.59 WTQ Hope this helps some of you! Last edited by Kelvin1000; 02-23-2019 at 02:58 PM.. |
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02-23-2019, 07:48 PM | #58 |
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Way better, good on you for getting a second result!
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02-23-2019, 10:34 PM | #59 | |
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02-23-2019, 10:45 PM | #60 | ||
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02-24-2019, 02:07 PM | #61 |
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02-24-2019, 06:39 PM | #62 |
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Which map are you sticking with?
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02-24-2019, 09:23 PM | #63 |
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That's a tough one...
I have been driving with the Stage 1 Map for the last couple of days and I think it may be the best of both worlds. It maintains the smooth power delivery of the stock and the CS tunes but it also provides more usable power for daily driving throughout the entire power band. While I absolutely love the CS Map, I think that I would probably miss the power from Stage 1. I will have to do some more testing of both maps before I decide. Any other opinions out there? |
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02-25-2019, 09:31 AM | #64 | |
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Have you considered the CS+ map. Based on the description of having a little less in the mid range than Stage 1 but near the same top end power levels I can't help but think that will be the map that I likely run in my car. |
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02-25-2019, 09:37 AM | #65 | ||
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