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RPM Launch?

Originally Posted by The HACK Late model cars are usually saddled with a clutch delay valve to prevent driveline-shock to the system when you dump the clutch. I have never

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Old 05-22-2009, 02:46 AM   #1 (permalink)
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Originally Posted by The HACK View Post
Late model cars are usually saddled with a clutch delay valve to prevent driveline-shock to the system when you dump the clutch.
I have never heard of this in any Nissans I have owned. I launched the 370 on the test drive at 3800 ish and it hooked up nicely. You just need to feel the wheel spin and throttle it with the right foot.
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Old 05-22-2009, 07:42 AM   #2 (permalink)
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FYI, I played with footbrake launch RPMs on the 7AT last night on a deserted road, so I'd have some idea about behavior at the drag strip. The stall is higher than I thought it would be on a stock car, as I was able to get up around 2500 RPM while locked down with the brakes pretty easily. It might be possible to push it a little further even. In any case, 2500 RPM broke the back tires a little too hard, it pretty much just burned them through the redline in 1st and they didn't catch solidly until after the shift to second. Somewhere around the 1,800 range seemed to hook up more ideally, at least on a normal pavement surface. If the track is nice and grippy, might be able to get away with a higher RPM though.
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Old 05-22-2009, 11:40 AM   #3 (permalink)
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I have never heard of this in any Nissans I have owned.
Never realized it's there either on my car(s) until I looked. Heck I wouldn't be surprised if it's on the WRX I drive now. Manufacturers have been quietly putting this little device on their cars recently to keep noobs and lead footed enthusiasts from destroying their fragile modern manuals prematurely. Especially with 6 speed manuals and the way the cogs are spaced so much closer together and packed tighter with weaker and lighter materials to save weight.
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