05-13-2018, 09:17 AM | #1 |
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M4 CS vs M4 ZCP Torque Curve
This difference between both models are rarely covered in the CS reviews/comparisons, but for me, as a previous M4ZCP owner, this is one of the primary reasons I upgraded to to the CS. In the graphs one can clearly see that BMW has made the torque delivery of the CS more linear (similar to the Porsche 991.2 turbo torque delivery) which builds as RPMs and HP increases. As few reviewers have stated, this change makes the CS more manageable at the limit and makes it feel more "naturally aspirated" than the ZCP setup. Thought it was interesting to share this difference in torque delivery between both models. Graphs below:
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05-13-2018, 09:22 AM | #2 |
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Looking at the graphs, I'd say that the CS torque delivery is in fact LESS linear.
But I understand what you mean. Also, I am not sure where the data for the graphs comes from, but the CS' and CP's torque and power curves shown do not match the ones published by BMW: http://f80.bimmerpost.com/forums/sho....php?t=1376759
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05-13-2018, 09:27 AM | #3 |
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05-13-2018, 09:28 AM | #4 |
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I was also still editing my post. These power-torque curves seem at odds with what BMW publishes for the CP and CS. Something is off (it says "approximation").
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05-13-2018, 09:31 AM | #5 | |
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It could very well be that something is off... not sure |
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05-13-2018, 09:35 AM | #6 | |
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Further, according to dyno plots from Evolve, it appears BMW have also tamed the low RPM torque output for all F8X with a software update.
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05-13-2018, 09:46 AM | #7 | ||
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05-13-2018, 09:58 AM | #8 | |||
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05-13-2018, 10:02 AM | #9 |
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Look at the power curves, if the CS makes more power than the CP at a given RPM, it inherently makes more torque.
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05-13-2018, 10:05 AM | #10 |
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Sorry to say, but no it is not correct. In the chart from my thread (which is the official BMW chart), in CS tune the S55 makes ~580N-m at 2400 RPM, which is more than the 550N-m of the base and CP tunes. Your graphs show the CS making less torque at that RPM. They also underestimate the torque above 5400RPM. The only portion they got right is the 4000-5380 peak torque plateau. The rest of the curve is off.
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05-13-2018, 11:56 AM | #11 | |
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05-31-2018, 10:08 AM | #13 |
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Was on a dyno yesterday with my M4CS the only mod is the MPE, results are as follow, data are not corrected with EWG......
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05-31-2018, 01:35 PM | #14 |
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