Mercedes CLS55 AMG only makes 457BHP at the crank? Dyno Run Garage Plus Eindhoven

I went for a dynorun not too long ago, but the results were way less than expected, well the horsepower figure was. Please note that it made 457BHP & 717Nm at the crank (not RWHP!), according to this measurement.
I suspect something went wrong, as my own Dragy measurements and comparisons don't correspond to this. Join the discussion here: mbworld.org/forums/w211-amg/8...
It does a 100-200kph in 8.99 seconds. Proof: photos.app.goo.gl/s5EmHtymtuY...
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Follow the upgrade / build process on my CLS55 AMG W219 on Instagram: / ndphotonl
0:00 Intro / Preparation
1:14 Calibration
3:08 Its Go Time!
5:21 Calibration (Alternative Angle)
7:12 Its Go Time! (Alternative Angle)
8:59 Dyno Results / Outro
w211 e55 #w219 #cls55 cls class cls63 5.4l 6.2l v8 supercharged charged supercharger ihi eaton dyno rollerbank rollenbank roller rollen bank dynojet awd 4wd rwd whp wheel horsepower amg c219 bapro dynamometer dynomometer meter dynamo braked inertia inertial ba pro #dyno

[@bigboycars]

❤❤❤

[@Wha_SAAB]

Upgrade the cooling. Stunning automobile.

[@NDPhotonl]

I have a larger intercooler and fresh Bosch 010 pump. kzbin.info/www/bejne/qqqaoGOqmKdjq6M . Pierburg pump is on my shortlist though

[@Wha_SAAB]

@@NDPhotonl did you do the split cooling mod yet? I think VRP sells it. Also, the dyno could just be inaccurate as well. Usually a dyno measures wheel horsepower, not sure what calculation this dyno would use to attempt to say that 457 is crank. 457 seems more like a wheel horse power figure to me, considering all the other data online.

[@NDPhotonl]

@@Wha_SAAB The split cooling is especially helpful with recovery after pulls, but helps nevertheless. I already scavenged some parts to do the split cooling myself, but still needs to be done. The dyno printout says 356bhp at the wheels > photos.app.goo.gl/TLUhfNaRipVD36Te6

[@Wha_SAAB]

@@NDPhotonl interesting. Is there a DynoJet in your area? That way we can eliminate some variables to get to the bottom of this.

[@NDPhotonl]

@@Wha_SAAB Join the discussion here: mbworld.org/forums/w211-amg/875814-low-dyno-results-what-went-wrong.html . So far it seems like a dyno run in the wrong gear (5th instead of 4th in M mode)

[@MrPetteflet]

Heat soak mate 😉

[@NDPhotonl]

That is probably also part of the "low" result

[@sebastiaanpeters7358]

Lekker boeiend dat hij op deze bank laag zit ding loopt als een trein. Evt op een andere bank zetten om het te controleren. Misschien wel verkeerd gemeten. Wanneer hij op een andere bank ook "laag" uitkomt evt in de brandstof toevoer of koeling zoeken.

[@NDPhotonl]

Hij loopt ook als een trein, 8.99 op de 100-200 seconden is daar oa. het bewijs van. Ik denk dat het een combinatie is van verkeerde versnelling (5 ipv 4) en heatsoak. Koeling zou in orde moeten zijn, fuel trims zijn ook netjes. Ga nog wel een keer naar een andere bank toe, maar heeft geen prio nu. Thx voor je berichtje!