For those that was running the ls motors before the vtec head swap was there much difference up to 3-4000rpm after going vtec? My compression ratio is bumped up to 11:1 (w/ctr cams ventuli plate itr intake manifold greddy exhaust everything else stock); yet I cant really feel a difference before vtec. I cant really hear vtec either (short hot air intake) it does make a different tone but I havent reved past 6krpm yet. So far it doesnt feel like its much faster (500 miles on the motor). Is it just my motor or am I expecting too much? Do you guys feel a great difference between the two motors? Thanks for all input.