That is not the main reason that lsvtec isn't great. The GSR and Type R have a r/s ratio of only 1.58, not much difference compared to the LS. That is not the issue with LS vtec. The problem is that most people think all that is involved is bolting on the vtec head, and the LS block can automatically take their newly added 1000 rpms from the vtec ecu. If you want to make it a safe revver, you need arp rod studs, and use a crank girdle.