I don't drag race (well, I've been to the local strip a couple times for fun, but it's just not something I care much about). It could easily be the case that if you're drag-racing a bolt-on NA 7AT 370Z, upping the line pressure can shave some milliseconds off your times. It certainly does have the intended effect of upping the line pressure, and you can feel the difference in the seat-of-the-pants shock on shifting.
All of that said, I don't think it's worth messing with (again, on an NA car) for regular street driving, or Auto-X, or Road Course racing / HPDE stuff. If anything, it just makes it more likely that you get a jerky engagement and upset the car's balance, which can really screw you if you're on the bleeding edge of traction. With the stock map, the engagements are smooth enough that if you're on the throttle accelerating out through a curve at say 80-90% traction limits, you can upshift while still in the curve (tracking out) and not suffer a spinout. With the jerkier engagements I wouldn't risk it.
Last edited by wstar; 03-05-2012 at 05:39 PM.
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