but i think if without modding the cams jz single item moding them cam pulley doesnt have much different lah..my mech told me its unnecesarry to mod pulley if didnt change hi cam
Cam gears help you to adjust your cams so that it opens and closes at the correct time. It also insures that maximum lift correspond to a desired crank position. The center line or the point on the cam where maximum lift occurs is known as lobe center. Setting the cams to zero on the cam gear means absolutely nothing and might even in some cases be harmful.
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