hey guys like the title says , here goes the story

i bought the car (87 T2 with a jspec 89 t2 engine) from my buddies garage. it had full single 3' turbo back exhuast (magnaflow) and K&N filter. i added a fuel cut denfensor (cuts off a 6500 RPM when it gets hot???? and 255 walbro fuel pump. 1st and 2nd gear its hittin about 7 psi and 3-4-5 around 9psi. heres the strange thing. i raced my buddies fd (full exhuast, clutch/flywheel) from a dig and from a roll, won both times by half a car. raced a supercharged 350z from a roll and beat it by half a car. stayed neck to neck with a twin turbo G35 until 4th gear till he pulled a car lenght on me. my question is all of us think its street ported, would that make sense? anything else it could be? i also have footage of all the races but its on the mini cassette so i dont know hot to post that.