Forza 7 help

[FlamBango]

Ok I'm playing Forza 7 and enjoying the single player but trying to get competitive in multiplayer

The problem I'm finding is with the tuning. I pick a car, download a tune that apparently gives me better numbers than the competition but in the race they just pull away like I was standing still. All I can do is flatten the accelerator but you can see everyone just pulling away.

What's the secret of a tune in this game?

 

[FlamBango]

nope, no assists. Well i've turned off suggested line and auto breaking but things like abs are still there. Gear change type? I've just gone through the garage and made every mod i could to keep the car within a type "C" and downloaded an online tune that someone uploaded that improves the numbers too. I compare my numbers against the lineup and theyre generally better. Slightly better top speed and better acceleration.

Its just a bit frustrating to be hammering along a straight as fast as possible and you get people going past you at lightspeed. I don't really understand what they've done that i haven't while keeping the car within the category.