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Hi all, I have bought a JDM R35 at auction in Japan. This is my second JDM GTR after owning one back in 2009. I have made a couple of videos that may interest some forum members. One is collecting the GTR from the compliance shop (and seeing it for the first time) and another on the process of buying and importing a car from Japan. I'm new to this and would appreciate your thoughts, as well as a subscribe! -
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Oh, yeah, no arguing that the duty cycle is different. And a circuit car will go to those speeds for more distance and longer times. But, I suspect that if a tailshaft has a harmonic problem, that it would cause damage and shit itself maybe even on the first pass. A second or two of running at the resonant/harmonic problem speed is already a couple hundred revolutions. -
By Dose Pipe Sutututu · Posted
Shaft speed would be the same, however it's how long they hold it there for and repeated conditions. FWIW half way down the main straight at SMSP I'm bouncing off 4th with a 8600RPM limiter. That shaft would be spinning at 8600RPM for a few seconds before I need to smash the brakes, by T2 it's getting close to that speed again. Now a drag car/roll race car would see that shaft speed for a 1 to 2 secs then they would coast, hit the brakes and that's it. -
With same diff ratio, tyre diameter and road speed, the tailshaft rpm is the same regardless of the gearbag's ratio. Given that very quick drag cars are probably doing similar road speeds to the fastest circuit cars (circa 300 km/h), and there will be many of either category that can't go that fast and so you'd have inummerable matchups between drag and circuit car speeds at smaller numbers, and given that they are probably using rather similar tyre diameters and probably using similar diff ratios, and...where any of those numbers were different they could quite easily be in opposite directions thus cancelling out.... I think you'd find that there'd be more similarity than difference in tailshaft speed between these two use cases, no?
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