keep in mind thats also an ls vtec running 9.5:1 compression (thats what it comes out to with stock ls pistons and a b16 head). give it a bump in compression, and the gsr with i/h/e is toast. higher compression will aslo create a larger spike when vtec pops since vtec is basically a race cam. larger cams like more compression.....also while ur at that site, take a look at the differences in power between the b16 and gsr heads. that site is VERY informative as far as possible power numbers go with different part combinations. also keep in mind most of this stuff was done in the early 2000's.....tuning has advanced greatly since then!