02 ZS 180 V's 52 ZS 180 with basic mods......

[Dave ZS-X]

with only 5bhp seperating them it should have been a dead heat or as someone said, whoever got away best so its no surprise really.
even if a totally standard zs went against a cammed and full exhaust equipped zs the gap will still be surprisingly small, you need a lot of extra bhp to really thrash another similar car.
I remember wirly and gorge racing down a slip road onto the motorway, wirlys was iro 190 bhp and the other was supercharged supposedly making 245 bhp, according to wirly, who was following, up to 130 leptons the sc car had only puller 4-5 car lengths.
Best way to make a zs faster is to shed weight from it.