Originally Posted by
Rocket55
I've been told/read 2 no 3 schools of thought with the lift pump. First up, the lift pump helps with throttle response and clears a flat spot around 2,500 rpm. Also been told that you won't notice any effect from a lift pump untill you start seeing big revs, approx 4,000rpm. anything under this you don't need one (this is also with a 12mm pump and not a stock pump). Seems to be consensus on 7psi but variations in required flow rate, some say heaps and some say bugger all as it's just there to support the IP at high revs. Also read a few reports of front seals in the IP failing after a lift pump has been installed which then fills the sump up with diesel. Also seen examples of the seal leaking without a lift pump. So who knows?
Apparently the airbox fits without needing to move anything and will fit with a second battery in the standard position under the bonnet. Hope they're right. If I have to move stuff then I should have got the Radius panel filter box instead as I think its a bit better setup, but requires the battery, header tank and vacuum canisters to be relocated.
Theory goes that the freer the intake is, the more responsive it is and torque it generates. time will tell I guess.