you starve your car out WAY before you could imagine hitting a governer, and i dont think our cars really have one.
i've riding alongside a 2000 buick regal, and he was feeding me MPH over our phones.
i managed to get the 4banger after mods to 117, but it was retarded, and took like 2 minutes to get there.......
anything over 100 and it moves like snails