2mm will make the different already. More air to go in to the air chamber and combusion room. That's why some bore it until 64 or 67mm... After market TB like Jun is 70mm at inner diameter. But bigger doesn't mean better, big enough for ur engine OK lar. Don't tell me a stock b16a is going to put a 67mm or 70mm TB.
as the subject above, any sifu here know and can share any method to tune the a/f and ignition of a hyundai getz 1.3?? need this since plan to low boost it.... heard ppl use safc for a/f but ignition how?
Im using HKS GT3037.
Currently overhaul my turbo.
Now looking for gasket for it.
Do anyone know where i can buy gasket for this turbo?
Or any shop can custom build metal gasket for it?
Location: Kepong, KL