Cam duration vs compression ratio vs dynamic compression ratio.(read description)

assalamualaikum dan salam sejahtera kepada pencinta ilmu pemotoran.. kali ni sy kongsi pengalaman berkaitan camshaft dan die punye charateristic.. insyaallah.. yg ade pengalaman boleh tambah kt komen.. perkongsian ilmu di musim pkp.. semoga bermanfaat.. insyaallah.. amin.. Noted* #dynamiccompressionratio IVC: intake valve close IVO:intake valve open EVO:exhaust valve open EVC: exhaust valve close LSA:lobe saperation angle CR:compression ratio DCR:dynamic compression ratio example: Cr=9 with IVC =25° will get approximately 7.75 DCR.. depend on valve saiz and piston bore size .. (square/under square/over square) *DCR for Ron95: 7.5-8.2.. to get proper DCR.. we need to match CR with IVC,piston bore and valve size.. cara naikkan DCR 1)rendahkan IVC(low duration cam) 2kecikkan saiz valve(head standard) 3)naikkan CR. cara rendahkan DCR.... sebaliknya.. *advance cam-IVC jadi kecik *retard/delay-IVC jadi besar. superbike-merujuk kepada sportbike/motogp.. tersasul harap dimaafkn..🙏😁