Project Car - GReddy HR-Z (part 2 -4.2L HR)

Although our original blue twin turbo Z and our 2nd white twin turbo HR-Z were very popular and powerful, we though it would exciting to take things to the next level.

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).


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!

Here is a sneak peek at the prototype 4.2L HR-Z parts (crank, pistons and connecting rods)

Next will be to build the engine...