[GFXjamie]

real world experience and reading a magazine and online conversations can only take you so far. Thats the reason i dont go on focus fanatics.

Not only that, but every motor and set up is different. Even i have a different motor and set up, but the basics still apply. The more air you can flow, the more efficient your set up can be.

Here are 2 dyno sheets, one with 2.5" turbo back and stock intake manifold, other with 3" back and cossie manifold. I know it isnt a direct comparison, as boost changed too, but the second run revs out to 7300, first one to 7000. At 7300 the car is still doing very well, torque is very slowly dropping in the top end but stays very flat while the power climbs. in the first run, it drops off pretty good in the upper rev's and you can see the horse power drop too in the top end. At that point revving to 7300 would of been pointless as power dropped off to much.

Just a visual for you. If i had turned up the boost without the add in's my torque would have peaked and dropped off harder as the intake and exhaust would not of been able to flow it to red line like it can now.