Personally, I prefer wider LSA's, it sacrafices a little bit of peak torque in exchange for more torque above the torque peak, so for a given duration, your powerband will be wider, and your torque curve flatter.
I also like short duration, high lift cams. the XE268 is a .842" lifter lobe profile, but a very aggresive one.
as a comparison, Bullet Cam's most aggressive .842"
226@.050 lobe is 270 adv,
226@.050, and
138@.2" with .326" lobe lift (.489 with 1.5 rockers)...
their most aggressive .904" lobe with the same
226@.050 duration is 270 adv,
226@.050, and
142@200 duration with .335" lobe lift (.502" lift with 1.5 rockers, 4 degrees more duration over .2" lobe lift)
and their least aggressive
226@.050 .842" lobe is 274adv,
226@.050,
127@.2, and .273" lobe lift....
so...to get similar .2" durations as the aggressive .842 lobe with a .904 lifter lobe, you can drop .050 duration down to
220@.050, or to the less aggressive .842 lobe, you can drop your .050 duration down to 212-214 degrees
http://bulletcams.com/Masters/Hlobes.htmhttp://bulletcams.com/Masters/HClobes.htmI had an XE262 in a 360 running about 8:1, and it wasn't bad, but it was a little cranky at low speed, and idle was a bit more radical than I would have liked. that was with a MP166K converter, low gear 904 and 3.55's....don't think I'd want bigger than that in a daily driver/cruiser, personally.
