nothing wrong with a F cam they are great turbo cam.i went threw this shit when was looking for a cam and cam motion and ed curtis gave me specs for a cam that was almost the same as the F cam but with a little bit more lift so i used the F cam and added some 1.72 rockers and the cam was the same as the cams they tryed to sell me.so unless you are making 800 to 1000 hp i say fuck a custom cam and if i was making over 1000hp i would not go with a roller cam anyway.im not trying to start a pissing match cause im not making the power either of you are just saying a F cam is not that bad