joe mate i think i gotta disagree with the theory lol
eg...... my old valver
i always run down the strip with 3/4 full tank of juice spare wheel and all seats still in
the valver ran consistent 16.1-3s with zorst n filter mods and on 16s, with 122 bhp at wheels (i reckon about140ish at fly.)
my williams as standard with all same petrol etc. running (alledgedly) 150 which i reckon is about 130 ish at wheels .......... and the best bit lol ........ it runs consistently 1 second quicker than the valver........ sure there is a bit less weight in the willy but surely not enuff to make it 30 bhp quicker than the valver is there????????
cheers
jon