07-05-2018, 11:28 AM | #23 | |
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07-05-2018, 11:48 AM | #24 |
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All Dyno #'s are to be used as a tuning tool; ie establish a base and use to overlay with after tune to establish real gains. All dynos have their formula for estimating HP, ie inertia vs load dynos.
Plenty of ways to modify the formulas for them to show #s you want; Dyno Queens always make me laugh in the comparison of charts. IMHO most accurate measure of power is using ET, Trap speed and weight. |
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07-05-2018, 12:21 PM | #25 | |
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07-05-2018, 01:21 PM | #26 | |
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07-05-2018, 04:24 PM | #27 |
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Wow, that shut everybody up. Nice mic drop Hedoniste. So, basically, the ZCP is a detuned Civic engine with LESS torque at lower RPMs for the folks who haven't learned how to modulate their throttle for best traction? This may explain why some mags have recorded LOWER accel times for standard cars. Better drivers perhaps?
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07-05-2018, 10:56 PM | #29 |
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Technically speaking, tire rolling losses are not drivetrain losses.
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07-05-2018, 10:59 PM | #30 | |
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It is important to note that we are only talking about a 500RPM difference before max torque kicks in in the very low portion of the rev range (1850RPM vs 2350RPM).
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07-05-2018, 11:04 PM | #31 | |
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See this thread, on average, the CP does out accelerate the non-CP: http://f80.bimmerpost.com/forums/sho....php?t=1376759 However, the slight very low RPM detune surely helps tractability in regular driving.
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07-05-2018, 11:17 PM | #32 |
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As a tidbit, I always chuckle when folks refer to the "torque at the wheels" numbers obtained on a chassis dyno. That number is purely fictive and does not exist in real life. It is simply calculated from the wheel power divided by the engine RPM. It is an interresting number to look at for comparisons, but it is not the "torque at the wheels".
The real world "torque at the wheels" is always augmented by the transmission and final drive gear ratios while torque at the flywheel is free of drivetrain loss. You cannot intermix both.
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07-06-2018, 12:32 AM | #33 | ||
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Only too many dyno overlays wanted to prove ZCP build up power quicker from low end. Which is not true.
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