1990 Nissan 300zx Skyline Engine Swapped Rb25det on 2040-cars

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Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.

Nissan GT Academy: Living the dream

When I first met Nicolas Hammann, he was beaming, as though he still could hardly believe this was his life now. He's a young guy, almost 22 years old. He grew up in Elkhart Lake, WI, doing some karting and road racing when he could. Just last year, he was at UNC Charlotte working toward a degree in mechanical engineering as a way to stay around cars in the future. Then he qualified for GT Academy. Jump ahead to January 2015, and Nic is in his first pro race, the 24 Hours of Dubai, representing Nissan behind the wheel of a GT-R GT3. And now he's here at the 2015 GT Academy Finals in Nashville, TN, acting as a sort of ambassador from the other side of the challenge – an example of what each of these guys hopes to achieve. After this, he's off to race at Lime Rock in the Continental Tire Sports Car Challenge. After that, back to his home turf at Road America. Nicolas Hammann's dream of becoming a pro racer has come true. The GT Academy National Finals are made up of four parts, equally weighted. Within each program, though, there is room for interpretation - a gray area where those in charge can make judgment calls about character and whatnot. On the first day, the competitors take part in a Gran Turismo 6 tournament, as well as a PR test. Day two is made up of a grueling physical challenge and a driving test behind the wheel of an actual car. The virtual racing takes place in a single room with multiple "sleds" — console setups with a built-in screen, Thrustmaster T500 force feedback steering wheel, and a pedal set. It is particularly balmy in Nashville during the first day of Finals, and all of the equipment — including a setup to livestream the competition on Twitch TV — makes the room uncomfortably hot. In this first part of the competition, drivers score points based on their finishing positions over a series of four rounds per group. Scrutineers look on to make sure everyone is playing above board. Between rounds, the individual competitors go before a panel of Nissan reps for the PR test, and they are asked a series of predetermined questions (with room for improvisation, of course). While the answers themselves provide some useful information about the competitor, it's the way they compose themselves that's really under inspection during this segment. After all, whoever goes on to race will be representing Nissan, Sony, and the country on a global stage. The longer a competitor is in the room the better, I'm told by the Nissan folks.

Nissan leaning on JATCO to remedy CVT problems

Nissan's decision to fit continuously variable transmissions across even more of its new models may be coming back to bite the Japanese automaker, as it's been hampered by customer satisfaction issues relating to its XTronic CVTs, which are provided by a supplier called JATCO.
From what we're understanding, the issue largely relates to customers' unfamiliarity with the non-traditional shift nature of a CVT. Dealers have reported complaints and service visits from owners over the belt-driven automatics (did these people not test drive the cars before they bought them and notice that they don't shift conventionally?).
The company, which Nissan owns 75 percent of, has come under fire from none other than Nissan CEO Carlos Ghosn, who's spoken about JATCO and its troubles rather openly. "Every time you launch a new CVT you always have some risks," Ghosn said in an interview with Automotive News. "So we now have a process by which, before we launch any new CVT, [JATCO] come before the Nissan executive committee to explain all the measures they have taken to make sure there are no surprises."