*facepalm*
I will do it like you do lol:NOTE:this is just a fast edited sound!Nothing special,no hard work...It will sound like in car whit windos closed(or close to that) but it was not done 4 game,but to show that all other sounds except engine are almoust totaly removed,not just noise!!!
It clearly say,just engine,bla bla bla...So,there is no exhaust sound in here and some ohter sounds,like wind,tires noise and litle rocks hiting the bottom part of car...Each sound can be isolated.So lets say that we isolate engine sound,but better,no echo etc,u can add bass,bit of click and crackle in low freq and much more...,than u can implement anythng u want in there!U can record exthaus from outside and add that in the sample etc. etc. etc. I see you limited yourself pretty well:confused: Sry on my English!
You know what they say..take it or leave it,what do you have to lose?