HELP ME PLEASE

HI guys can you give me a litle help round tracks like canada .. abu dhabi .. etc (with tight corners and hairpins) im realy poor on .... but tracks like spain ... silverstone ... brazil with nice flowing fast corners i feel im realy good round them .... what am i doing wrong ?? is it my setups?? or is it my wheel settings .... because last night for example i was doing 1 19's with my steering wheel settings all on zero and force feedback off ... anyway after i pited i changed my saturation to 25 and my linearity to 8 and was doing 1 15's 116's straight away .... so can a couple of guys leave there wheel settings for me to try ?? and do use think i should put force feedback on ?? what do you's think and please help me i hate getting beat ... especialy when im geting beat by 3 laps its ridicoulas and i hate it i just want to be competitive any help tip's setups wheel setting would be a great help because i feel ok without assists now .. just tracks like canada my swheel has so much understeer and im sure its something to do with that ...any help please ?

I'll meet u on at some point and try help u out.

ok thank u mate really apreciate it thanx