Shifting for speed
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This is a discussion on Shifting for speed within the Transmission & AWD forums, part of the Tech & Modifying & General Repairs category; I have a 2013 STi , and when accelerating the one thing that limits 0 to 60 times is the ...

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    Shifting for speed

    I have a 2013 STi , and when accelerating the one thing that limits 0 to 60 times is the turbo lag when letting
    off the accelerator to shift ...my question is this : are their any tricks or tips to keep the boost up so I don't have
    the dreaded turbo lag between gear shifts ?

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    get a Cobb Access port. the all your tunes with it will have launch control and flat-foot-shifting. this is so that you keep your foot on the gas through shifts. just set it where you want and it does exaclty what your asking for
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    Quote Originally Posted by elblanco1987 View Post
    get a Cobb Access port. the all your tunes with it will have launch control and flat-foot-shifting. this is so that you keep your foot on the gas through shifts. just set it where you want and it does exaclty what your asking for
    If you install the Cobb , does it leave a signature in the computer ?

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    Master Baiter EJ257's Avatar
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    Your ideal shift points would be pointed out to you in a dyno graph. Unfortunately, due to smoothing, a road dyno plot isn't suitable for this use.
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    Yes. It's called "No-lift" shifting, or you could go with anti-lag
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    Luke Skywalker Mikie13's Avatar
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    You're not shifting quickly or precisely enough
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    Quote Originally Posted by Mikie13 View Post
    You're not shifting quickly or precisely enough
    +1

    Turbo lag comes into play when your rpms aren't high enough to keep the turbo spooled... if you are shifting near redline, then as long as you shift quickly, you shouldn't drop low enough in the rpm range to get out of boost and need to respool the turbo.

    The only time I get any turbo lag on a full out WOT pull is at the bottom end of first gear...

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    Quote Originally Posted by Monk_Knight View Post
    +1

    Turbo lag comes into play when your rpms aren't high enough to keep the turbo spooled... if you are shifting near redline, then as long as you shift quickly, you shouldn't drop low enough in the rpm range to get out of boost and need to respool the turbo.

    The only time I get any turbo lag on a full out WOT pull is at the bottom end of first gear...
    WTF are you talking about?!

    Whenever you let off the throttle, your engine consumes less air and the turbine will receive less pressure. I don't care WHERE in the rev range you let off the throttle, the turbo will have to re-spool when you get back on the throttle. It just happens quicker at higher RPMs when your engine can move more air.
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    Just attach a straw onto the turbo inlet and blow in between shifts. Its what they call blowing a mustang.

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    Quote Originally Posted by wreckingball man View Post
    Just attach a straw onto the turbo inlet and blow in between shifts. Its what they call blowing a mustang.
    It's blowing a Camaro.
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    Weld your bypass valve shut...
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    Just sell the damn car and get an Impreza GT (I think it's called) the one with turbo but sporting an autotrans... Then flat foot shifting is a no-issue... that will also take care of when to shift...
    You can't have everything - where would you put it?

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    <-------- Taylor Swift.
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    Captain James of the SS Impreza has gone down with the ship Drews's Avatar
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    You know how to shave a couple of tenths off your time? Power shift.
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    Quote Originally Posted by Drews View Post
    You know how to shave a couple of tenths off your time? Power shift.
    Don't forget about taking out the back seat....
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