Re: Dyno ?, Numbers don't add up
I used to figure about a 30% loss between gross and net, both are measured at the crank. I'd figure at least another 10-15% to RWHP but then everything has "correction factors".
Even back in the Toledo days a good operator could add "Kentucky windage" to the readings used to say the only way a F*rd 390 made 300 hp was to crank it wide open, dump in the load, and see how far the needle swung.
This is a small one. Those in the GM dyno lab were a lot bigger. And green.
Last edited by Padgett; Jan 2, 2014 at 01:48 PM.