gots me a pair o' MGs
Join Date: Jan 2006
Car: MG TF 135, MG ZS+ 120
The throttle body will be 48mm regardless of whether it's alloy or plastic. If you have a plastic TB it's worthwhile swapping it for an alloy version as the plastic ones are known to stick. You can fit a 52mm TB but the benefit will be minimal.
It is understood there is generally no benefit to decating a K-series as the engine requires an amount of back pressure that a decat denies it. Plus your emissions at MOT time may be problematic.
The 1.8 is not the best engine for the Freelander to be honest and will never be a thrifty fireball. If you crave greater MPG and more poke then get the diesel. Otherwise just make sure it's well serviced.
One for summer: 2004 MG TF 135 in Firefrost
One for winter: 2002 MG ZS 120+in Solar Red