mesterious

iTrader: (3)

Well im about to get a cam for my 406 small block chevy and im either going with a comp cam XR286R or a Lunati Voodoo 60133 and the specs for these cams are (XR286) Adv dur. 286/292 -- dur. @ 0.050 248/254 -- Lift .576/.582
(60133 Voodoo) Adv dur. 279/285 -- dur. @ 0.050 249/255 -- Lift .585/.600
The reason im confused is cause the lunati has more duration at .050 but less Adv duration and Advertised duration plays a roll in DCR so i need to know is Adv duration anything to go by when it comes to cams?

ZONES89RS

iTrader: (25)

I pay no attention to advertised, just ,050 spec. That tells me a general operating range, drivability and RPM band with the LSA figure.

mesterious

iTrader: (3)

so when im trying to choose which gas octane i should use do i base it on Static compression ratio then?

ZONES89RS

iTrader: (25)

No, DCR is what everyone uses.