The main idea of the second stage of our HR-Z build up, was to show the real potential of the new Twin TD06SH-20G Tuner Turbo kit. Although the kit works very well on a stock VQ engine with simple tuning upgrades like injectors, a fuel pump, spark plugs, turbo exhaust, boost controller and a tuned e-manage Ultimate (400-425whp range).
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhbZdyfQ8hp68v6xjVBdk7saK862K-Ax1642gZVPzZPLYMYwTd9UWPCfny7wdhEYIK7Mp46wOLGFqYLquU-_3iZwqqMgdgtiIqRiYL_bVsgNfShuH1rxov-mg00dDWSRIxU8fb20JPWT6QF/s400/HR_TunerTurboKitk.jpg)
The limiting factor for getting over 450hp reliably, seems to be the engine internals. Many of our authorized GReddy Dealers have shared with us the ease of getting 600+hp with a strengthened VQ35DE engine and our Z turbo kit, but we decided show the basic Tuner Turbo Kit can do even more. The idea is to build a stronger 4.2L VQ-HR for even more power. This build will take things to a new level with a tentative goal of 700-800+hp!
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5YFLnhwJQ2nOqowhZzSZY8mo1q2Dn2ybbEtlbymk0hTinkl5lKK5MwSf7aLk7lGgKSt6UyLa3Q19vj-9iaEltYTZ8PXoJ7fQSy29lKJgt5TFB_Z4EolR84pNM2gzrAxYtgSletg6iCZK9/s400/42L_Parts.jpg)
Next will be to build the engine...