loss of power

[88fivepointoh]

Hi Guys! How is everyone? ok, well i am having a problem that when my car warms up or i drive it for a little while it seems to loose its power.. when the car is cold there is a big power difference to when it is warm.. it has a much noticable snap to it when it is cold.. i had this problem before i made all my mods, but now it seems to be getting a little bit more noticable.. the car runs fine as far as everything else goes. I upgraded my car to mass air, with 24lbs injectors, and 75MM granitelli mass air meter. I have trickflow upper and lower intake, headers, off road H, flowmaster exhaust, msd coil, 155lph fuel pump, 1.6:1 Roller rockers, F-303 cam, 65mm TB, 160 degree thermostat, etc etc etc... I have tried to solve this cause last nite while just cruisin i had a pack of imports come up to me and they gave me a run and i dowshifted to 2nd at about 5K and it felt like i wasn't accelerating that much almost like rev limiter but i know for a fact i wasn't there... any ideas would be greatly appreciated.. thanks for everyones help!