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chassis dyno hp accuaracy

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Old 07-18-2009, 08:24 AM
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TB993tt
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Default chassis dyno hp accuaracy

May I share an obsession with "Porsche turbo crank hp" which I learnt about earlier this week.
RS Tuning on an annual basis test a random turbo engine on a scheduled day on their engine dyno and convert to "Porsche turbo crank hp" using their software then the same day the engine is taken in a van to Porsche Weissach (which is 500m higher -needed for correction) and put on their engine dyno and a maximum power number obtained using Porsche software. It usually comes out within 5 hp.....
I am told that "Porsche turbo crank hp" is actually slightly higher than a strict DIN calculation.

Just thought I would share this in the light of some of the chassis dyno power claims around, 671 "crank hp" on a stock VGT 997tt for example - the market has gone truly bonkers
Old 07-21-2009, 10:19 AM
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eclou
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I figured you may have seen this TPC timeslip...
Old 07-21-2009, 10:33 AM
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Gene, yeah saw that..... phenominal

It just gets more and more interesting and confusing (for me)
Old 07-21-2009, 10:41 AM
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I think the conditions were 83F which was helpful this time of year
Old 07-22-2009, 11:22 PM
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What is the issue with the timeslip?
TB-- is that HP claim quoted a modified car or a dyno reading for modified car with stock internals?
Old 07-23-2009, 06:56 AM
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Originally Posted by Red9
What is the issue with the timeslip??
Is there one ?

Originally Posted by Red9
TB-- is that HP claim quoted a modified car or a dyno reading for modified car with stock internals?
The latter I think but with stock VTGs which measuring on a Porsche "calibrated" engine dyno will not give more than ~550PS DIN



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