has anyone ever put a car on a dyno before and after 3.0litre cams been fitted? i`ve always been dubious about the power gains from just fitting cams, cant see how they can bring the power up so close to the 3.0litre engine which already has those cams fitted!
id be interested on that as well. i dont understand how putting 3.0 cams in the 2.5 will give good gains. the 3.0 will always have more torque and bhp is rpm x torque so how can the 2.5 get to similar power to the 3.0 :-?
Bhp = (torque x revs)/5252.....if you want more bhp, juts move the existing torque further up the rev range (exactly what motor bike and F1 engines do).
The cams do work and there are dyno plots around to prove it, its more popular on Vectras and Cav/Calibras though.
The cams offer extra lift and longer duration......I suspect that the 2.5 might have been slightly throttled to give better low end torque and to make sure there was a decent differential between teh 2.5 and 3.0.
And as already said, this is exactly what was done to the 190bhp Vectras......