need someone to help with calculating the dcr of a factory ls2 with a cam using comps 13018 intake and 13019 for the exhsust lsl lobes on a 112+4. I can't seem to get it right. Thanks in advance. 231 dur 617 lift and 235 ,621

 

You need the advertised duration (@.006 lift)

 

I came up with 8.29 DCR
Duration at 0.006 for 13018 is 281 and 13019 is 285. LS2 is 4" bore and 243 head is 64.5 cc chamber. Did I get it right ?

This was using the PianoProdigy calculator. It only seems to like advance center line and does not seem to recognize a retarded centerline, say 228/228 110-1 LSA