cam duration

for an iron headed small block at about 9.5:1 compression.
..what is the least amount of duration you can get away with
before you have detonation issues.

looking for shortest possible duration without having major detonation problems

i was hoping something around 216 / 220 (intake) might bleed off enough...I also would like a fairly clean,smooth idle

For those who seemed to have skipped over the OPs posts.
He's not looking for a big cam. He IS looking for the smallest permissible intake duration, commensurate with 9.5Scr, and freedom from detonation.
So, who is running something with an ICA of under about 62 degrees, and Scr near 9.5, and pump-gas;
and what are your secrets?

This thread is a cluster ****
Yup. Nobody seems to give a damn about the OP's original point. I tried to stay on target.......for once.

Well almost everybody. Our stage II cam is [email protected] .520" lift 114 LSA 9-9.5 comp is fine on 91. Our stage I is 203@ .050 .450" lift 110 or 114 LSA no problem on 91 or even 87. Both offer a nice idle and good torque for street. There seems to be so much confusion about cams, I dont get it....