I know this has been done to death but, i've done a search on here and google and all i can find is conflicting advise! Some say i need to change valve springs, injectors, inlet manifold, maf, ecu throttle body and cams. While other say just replace the cams only!

The car is a 115bhp 1.8 silver top mondeo which i will be doing timing belt on soon, so if simply chucking in some 2.0 cams at the same time will result in a bit more power for little cost/work then ideal.

However, if just putting the 2.0 cams in on they're own are going to increase fuel consumption/make it run like shit i won't bother, likewise if the inlet manifold needs to be replaced/valve springs it's not worth the hassle.

Ultimatly it's a daily driver so if the 2.0 parts fitted are going to increase the fuel bill i won't bother or effect reliability/drivability etc then i won't bother.

Any ideas folks?