Ancillary Power Loss

[marine boy]

Any ballpark figures for how much horsepower is lost from running power steering, radiator fan and air conditioning off an M5 V8 engine.

It must amount to power eventually lost at the fly wheel and wheels but how much?

[Huff]

S.W.A.G numbers, but... same as any other large car:

Steering virtually nothing until used. Newer cars even do this electrically. Call it 1Hp, but very low duty cycle / lower average draw.

Rad fan - again - not much unti needed. 1-3Hp peak with viscous fan, probably a bit less if electric (eg good electric aftermarket fans manage on <<30A at full chat, or 0.5HP at nominal 12v electric power)

Aircon - 3-5Hp max of compressor power, based on a guess of efficacy

So assuming a 'perfect storm' - under 10Hp.

[marine boy]

thank you sir, much appreciated