i have been looking for a set of cams for a whiles and i have been offered a set of skunk2 pro1 cams and a set of buddyclub spec 4.

whilst the lift is almost the same i know the durations differ a fair bit between the two (270 odd with the pro 1 and 300 odd on the bc4)

so with the pro 1 i should make roughly peak power around 7900-8200 rpm, and the bc4 around 8500-8700 (ish) though the low lobes on the pro 1 are alot larger

its going on my built b20.

spark racing I beam rods,
acl bearings
84.5mm spark racing itr spec pistons.
lightly "cleaned" b16a head (i just smoothed out the casing lines and sorted the lips in the intake ports, left the ridges in the exhaust ports) running itr spec valve seat angles.
5 thou head skim, puts compression to 12.0 (give or take)

skunk2 pro intake mani, spoon 70-68mm throttle body, TDM Tri-y manifold. i have done the mapping on BRE, planning on mapping these myself to.

i have found a comparison on bc3 cams vs the bc4 cams on a similar build which is here:



i just cant figure out how the power curve and shape will look on the pro 1 cams. does anyone have a similar setup as my b20 with pro 1? that graph above looks reasonably good witha nice broad power at the latter rpms that carrys on for a while

car is my "fun" car. i dont cover more than 5 thousand miles a year if that in it. im jsut planning on using it for the odd dragstrip day and track day etc

thanks!