As we described before, the RB26DETT does not have VVT, as Nissan did not introduce that until eventually the early-‘90s and never ever set it while in the RB26 series. Having said that, HKS produced an answer called the V Cam method. Although it only operates for that consumption side, https://buyrb26engine60481.blogsmine.com/29780216/buy-rb26dett-engine-options