b17a is from the 92-93 gsr.
came w/ 160hp/114lbs of torque.
yes the gear ratios are different.
and yes, u beat a car that SHOULD beat u w/ even drivers. u simply out-drove him
EDIT: the 17's would slow him down as well. have him put on some stock 14/15 in rims and he'll be a bit quicker.