Nissan 350z jdm body weight1/6/2024 ![]() With power production out of the way, Costa and Dai enlisted the help of suspension guru Mike Kojima of in setting up the footworks. The kit also gives a factory OE appearance and requires little to no maintenance." Dai and Costa elected to reinforce the driveline with a Jim Wolf technology twin-disc clutch and flywheel, and OS Giken 1.5-way LSD. ![]() "Power is more predictable and controllable, with more direct input from your accelerator pedal, giving the feeling of a much larger engine. "The supercharger will give greater torque response on and off the throttle, whereas a turbo will have a slight delay in building boost," explains HKS' Jon Kuroyama. Consisting of a belt-driven GT7040 compressor, the kit was installed and tuned by HKS to boost the Z's peak output by 63.5 whp and 69 lb-ft of torque-less than some competing cars, but with a linear powerband and immediate throttle response other forced induction solutions can't offer. HKS had a big hand in the original 2007 SEMA debut of the Z, fitting it with its then-new GT Supercharger kit: a planetary-gear-driven centrifugal system offering the low-end power and torque of a Roots-type supercharger, with a top-end range more plentiful than a small(ish) turbocharger. The chromoly cage he fabbed for the Z weighs about 150 pounds-a great tradeoff, considering it allowed the car to lose in excess of 500 pounds, while increasing chassis rigidity by an estimated 40 percent. "We removed about 200 pounds when we scrapped the roof, folding motor, wiring, and metal chassis reinforcements to hold it all in place," says Costa. "The B- and C-pillar areas of the car have as many as three additional plies of sheetmetal in some places." Another heavy spot is where the roadster's folding roof mounts to the body. "The 350Z roadster is loaded with structural reinforcements to compensate for its lack of a roof," explains Costa. Class rules allow the use of a roll cage-a good idea in any track-driven roadster-and adding one would improve safety as well as chassis rigidity, allowing more weight to be lost. "USDM Zs didn't come with the 2+2 design the Japanese ones did that included rear seats," Costa explains, "but the sheetmetal reinforcements and mounts for hinges and seatbelts are still there." Removing them, along with harmonic weights mounted at points on the Z's chassis to decrease NVH-a 6圆圆-inch square chunk of steel in the right rear corner of the trunk, another on the front core support, and a smaller one attached to the trans mount-shed another 100 pounds. Step one was to cut weight, which Costa did by removing the car's extended audio equipment (40 pounds), replacing the hood, trunk, doors, fenders, and interior panels with lightweight alternatives from Seibon (150 pounds), ridding the car of its heat and a/c, airbags, all related wiring/plumbing/ducting, and replacing the stock recliners and inertia-reel seatbelts with Sparco seats and six-point harnesses (150 pounds). The car was brought to his shop, GTI (Gialamas Technical Innovations), in San Clemente, CA, in September, and a plan was hatched to have it in presentable time-attack form by the SEMA show two months later. ![]() Dai's first call was to Costa Gialamas, crew chief for Dai's and Rhys Millen's Formula D efforts from '07-'09, including their First/Second finish at the '09 Red Bull Drifting World Championships, and Rhys Millen's '01-'03 rally racing and Pike's Peak international Hill Climb record-setting efforts. ![]()
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