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That is typical (for a rb at least) with a medium to large turbo, noting the format of the graph is probably misleading what you see a little (half portrait width but full height, in landscape it would look quite different) Basically until it hits target boost the torque curve is rising steeply, when that is 4000+ rpm it is not great to drive since almost all of your life is between 1,000 and 3,000 rpm. Once you hit target boost the wastegate opens and torque stops rising so quickly. From there the shape of the curve depends mostly on the cams and where they have a peak vs the rev limiter -
Last of the maintenance items for now....not sure why but the drivers side window switch had heaps of wear on the right front and right rear switches Unfortunately, unlike earlier Skylines the controls are bolted to the door trim from the inside. So....off the with door trim. There are bolts or screws: Behind the door handle cover, pop it off from the handle side Under the rubber trim at the bottom of the door pull (also just pops up) Behind the courtesy light at the bottom. Other than that, just window down then pop off the usual selection of push in clips around the perimeter and the trim lifts up Interesting that they have a bolt on cover instead of the old school plastic held on by goop....I guess they prioritised sound levels over price Then, 2 screws and 2 plugs to replace the switch (looks identical to the Fuga/Q70 one incidentally) and put it all back together. Also much better
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ok I understand, but the majority of turbo vehicles lose torque, or have a flat torque curve after the spool. hence my initial misunderstanding. I didn't think this type of curve was possible -
It is completely normal. Your original understanding is what was wrong, not what you see in the charts. -
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