Southern Softies - Southways Automotive 14 Dec 2013 PICS

[S70T5Chris]

The point of most dynos is to obtain as accurate flywheel figure as possible. The power is measured at the wheels, but as each dyno is different on how it obtains that figure, it vary's from dyno to dyno. Whilst the flywheel hp generally stays consistent within reason, once the magic has happened.

Surely the fact that you admit the bhp figures on a maha are accurate enough, but the whp figures are wildly different, proves that whp figures in general are bogus. You can't possibly think the whp figures from today's runs are accurate?!

[LiamT4]

The point of most dynos is to obtain as accurate flywheel figure as possible. The power is measured at the wheels, but as each dyno is different on how it obtains that figure, it vary's from dyno to dyno. Whilst the flywheel hp generally stays consistent within reason, once the magic has happened.

Surely the fact that you admit the bhp figures on a maha are accurate enough, but the whp figures are wildly different, proves that whp figures in general are bogus.

I've only noticed that on the maha dynos though.

You understand the point I was making about the power losses with 4wd and 2wd though? Also people should stop thinking about it in bhp, whp, etc and think about it in a purely physics term, i.e energy, and as the dyno measures the energy at the wheels, and as this is the only contact point for the dyno, then a mistake there will cause mistakes in the bhp.