way too many factors to take into account.same car at different rolling roads get different calculations.michael has been to a few dyno places.if you take it as a rough guide it could be something to add intrest to dyno people.i never fancied going on a dyno.
with different tracks and same car i have pulled mid 12`s before at elvington/york dragway and santapod.dont they say the black dyno never lies.also with terminal speeds that supposed to be a good indication to your power levels.
there is loads of options you can list
jap turbos,uk steel turbos,hybrid stage 1 2 and 3
fuel used,boost u running.auto/manual.
the small list i did in drag thread was just a rough guide from thor racing.