Re: GTV 3.0 max bhp???
I've heard of a 3.0 V6 with hot cams running higher comp pistons, compression ratio was something like 11.3:1. But if you have to retard the ignition to prevent it detting then there goes any power gain.
As it stands, the 3.0 on full throttle is running reasonably low compression, and pretty rich. I reckon there's power to be made just by leaning it out and advancing the ignition. You'll need good fuel to do it though, and I don't know if remapping the standard ECU is the way to do it, or using an aftermarket ECU..