Quote:
Originally Posted by ovekvam
From 233 hp in the engine to 172 hp at the wheels? That is more than 26 percent loss.
For reference, my previous car, an unmodified 116i, is specified to have 136 hp in the engine, and the dyno said 139 hp at the read hubs. That is a loss of minus 2 percent! :-)
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That dyno probably measured to the crank. Sometimes you have more power than the factory says.
Its also depends what dyno are you using, FWD, RWD and AWD, etc.
here you have a calculator for it (is not 100% accurate)
https://www.mk5cortinaestate.co.uk/calculator4.php
In general a FWD lose around 20% from crank to the wheels .
For example this 320d (same engine, same ECU, same dyno, but RWD)
Got 103.7kw (139whp) stock and 126kw (169whp) after remap
a 120d from factory have 184hp, so if you use that calculator it would give you 180hp. So thats means with that RWD you lose around 24% from crank to wheels .
Anyways, what matters is what you have at the wheels