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Old 01-29-2011, 07:44 AM
 
Location: New Orleans, LA
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I've read a few car magazines about a couple a years ago and it said something about "blip" while shifting. Also how do a person "double-clutch" while shifting?
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Old 01-29-2011, 08:24 AM
 
Location: Central Texas
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A "blip" is a burst of throttle and rpm. You would give the gas pedal a quick jab.

Double clutching means to let the clutch engage while the transmission is in neutral between a shift. So it is a deliberate engagement of the clutch to neutral between a shift from one gear to another. It is done to cause better speed matching in the transmission before you shift to your desired gear - often if the synchronizers aren't quite up to snuff.
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Old 01-29-2011, 08:55 AM
 
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Quote:
Originally Posted by hoffdano View Post
A "blip" is a burst of throttle and rpm. You would give the gas pedal a quick jab.
That would be done (the blip)whilst downshifting with a manual transmission and is mostly used with heel/toe shifting techniques in racing situations.
Double clutching was a technique used to prevent grinding gears on manual shift cars before the invention of synchromesh gear boxes.
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Old 01-29-2011, 01:19 PM
 
Location: South Jersey
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a blip brings up the rpm to match the lower gear rpm vs. speed of the car.
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Old 01-29-2011, 02:52 PM
 
Location: Chicago
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Here ya go -- throttle blips for rev-matched downshifting using the heel-toe method (using the heel of your right foot to jab the throttle pedal while the toes are on the brake pedal):

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Old 01-29-2011, 03:08 PM
 
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Basically blipping or "rev-matching" it's done to match engine speed to road speed for the desired gear...usually when you want or need to select a lower gear that requires the engine speed to be higher for the given road speed. You don't have to do this in modern car transmissions but it does make downshifting smoother and easier on the hardware.
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Old 01-29-2011, 05:02 PM
 
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doesn't Nissan's 370Z and GT-R have auto rev-matching even with manual transmissions? I always thought that was a pretty sweet feature.
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Old 01-29-2011, 05:21 PM
 
Location: Chicago
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You can't get the GT-R with a conventional manual. It has a DCT and they all rev-match before downshifting.
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