Transmission-wise, the factory six-speed gearbox has been joined by an ORS twin-plate carbon clutch with lightweight flywheel for blistering-fast gear changes while the Tomei T-Trax two-way helps to efficiently distribute power to the rear wheels in all sorts of tricky conditions. Additional upgrades include a Trust 22 row oil cooler and an RG racing radiator. Power sits at 370 hp with the kind of immediate response you would expect from a big-displacement, naturally aspirated motor. Along with the Revolfe flashed stock ECU, an HKS F-Con IS piggyback computer was added and custom mapped by Ito-san at Do-Luck to get the most out of the newly built engine. The exhaust system starts off with Revolfe high-flow exhaust manifolds then dumps to Power Craft sports catalysts (in place to meet the Z Challenge regulations) and finishes up with a Power Craft Z Challenge race exhaust. A custom 90mm induction pipe helps boost the amount of air that enters the engine, scooped up from the front of the bumper thanks to the Do-Luck air intake and upgraded filter fitted in the stock airbox. The compression rises from 10.3:1 to 12:1, and to utilize the higher compression, Mizota-san went ahead and added Tomei Powered 272-degree camshafts and Power Enterprise 0.7mm metal head gaskets. To further increase power, Nismo Spec 2 heads-factory-tuned, high-compression items that boast revised combustion chambers-are ported and polished and sport a fully upgraded valve gear with larger and lighter valves as well as high-lift springs. The crank and connecting rods were left stock, while Tomei Powered competition bearings were used to ensure high-rpm longevity on the track. To fit special high-compression forged Revolfe pistons, the VQ35 had to be stripped down and the aluminum cylinders bored and honed. So while all this makes it a good street car, there were quite a few areas that needed to be addressed to make the Z33 a more focused track weapon. The Z has always been a GT cruiser rather than a full-on sports car, offering simple and true driving dynamics via the combination of a decent chassis and an honest rear-wheel-drive layout. The Z33 has become quite the affordable performance car purchase, as prices have dropped to an all-time low now that the Z34 has established itself.
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