Driving habits when cold engine

View Poll Results: What are your driving habits when driving a cold car?

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  • I don't have one, just drive, go and don't worry about the RPMs

    2 1.37%
  • I let the car sit until the oil temp settings are up to normal values

    8 5.48%
  • I only drive below 2000 RPMs until the oil temp settings are up

    1 0.68%
  • I only drive below 2500 RPMs until the oil temp settings are up

    2 1.37%
  • I only drive below 3000 RPMs until the oil temp settings are up

    18 12.33%
  • I only drive below 3500 RPMs until the oil temp settings are up

    5 3.42%
  • I only drive below 4000 RPMs until the oil temp settings are up

    0 0%
  • I only drive below 4500 RPMs until the oil temp settings are up

    0 0%
  • bewbs

    110 75.34%
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This is a discussion on Driving habits when cold engine within the Everyday Impreza Talk forums, part of the Community - Meet other Enthusiasts category; Hi everyone, I started a thread earlier about how I revved my engine to about 3,800 RPMs on cold start ...

  1. #1
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    Driving habits when cold engine

    Hi everyone,

    I started a thread earlier about how I revved my engine to about 3,800 RPMs on cold start (here: Is this bad?) and got me thinking about doing a poll to see what others' habits are when the engine is cold. So out of curiosity, what are your guy's driving habits when you first start the car? For example, do you just let it on idle until you get to normal temperatures?

    For mikie13 ( . )( . )
    Last edited by Betlog; 02-22-2013 at 03:00 PM. Reason: Added "bewbs"

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    MAINEiac 11blackSTi's Avatar
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    I just turn the key and floor it

    No just kidding.

    I always turn my key to on so my boost gauge zeros out (AEM analog), and then start the engine. Then I wait for 2-3 minutes or so for the engine to warm up. I won't crank on it though until the engine is fully warmed up (5-10 minutes). If it is really really cold out I let my car warm up for 5-10 minutes before I even move it. If you absolutely can't wait, just wait 30 seconds or so for the oil to circulate and then keep the rpms way down until the engine warms.

    Also, I wouldn't recommend turning the engine off directly after cranking on it. If I have been on it right before I stop my car, I usually let it idle a few minutes before I turn it off.

  4. #3
    Road Hazard STI*NG's Avatar
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    I'm usually not in a hurry to get anywhere so I'll start up, wait a couple minutes, and go. In the winter I go out and start the car while I'm getting ready, so it usually idles for 5-10 minutes.
    A nice leisure cruise through the neighborhood ensures that everything is up to temp by the time I want to put a load on it.

  5. #4
    OMG WTF MainFrame's Avatar
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    I try to keep it under 3k with no boost until my oil pressure stabilizes.

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    Is the RPM value of what is considered "abusive" relative to the rev limit of a car? For example, with the WRX rev limit of 6,700 RPM, is 3,000 RPM similar to 4,000 RPM on something like a Honda S2000, which has a rev limit of 9,000 RPM? If so, a 4,000 RPM rev on ours would be like a 5,300 RPM rev. on the S2000.
    Last edited by Betlog; 02-22-2013 at 02:46 PM.

  7. #6
    MAINEiac 11blackSTi's Avatar
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    Quote Originally Posted by Betlog View Post
    Is the RPM value of what is considered "abusive" relative to the rev limit of a car? For example, with the WRX rev limit of 6,700 RPM, is 3,000 RPM similar to 4,000 RPM on something like a Honda S2000, which has a rev limit of 9,000 RPM? If so, a 4,000 RPM rev on ours would be like a 5,300 RPM rev.
    I would look at it more as...when does my turbo start to boost. I wouldn't be going into heavy boost loads until the car is warmed up. Below 3K is going to avoid boosting. 4K you will be boosting (although not full boost).

  8. #7
    Road Hazard STI*NG's Avatar
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    With the bike it's a totally different thing. Start it up, pin it to the limiter a few times, and race off.
    No wait, I forgot I'm not a squid...

  9. #8
    Pro Manscaper Mikie13's Avatar
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    No bewbs, no polling.
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  10. #9
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    Quote Originally Posted by Mikie13 View Post
    No bewbs, no polling.
    Fixed.

  11. #10
    MAINEiac 11blackSTi's Avatar
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    Quote Originally Posted by Betlog View Post
    Fixed.
    Haha...No it has to be a poll option

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    ClubWRX.net Vendor rexxx0486's Avatar
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    I voted under 3500 rpms, (since there was no bewbs option) but I'm always late for something so I often just get in and go. Then again I work at the dealership so breaking something isn't as big a deal for me as for a lot of you guys...
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  13. #12
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    Quote Originally Posted by 11blackSTi View Post
    Haha...No it has to be a poll option
    Sadly, I can't edit the poll.
    Last edited by Betlog; 02-22-2013 at 02:28 PM.

  14. #13
    OMG WTF MainFrame's Avatar
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    Quote Originally Posted by 11blackSTi View Post
    I would look at it more as...when does my turbo start to boost. I wouldn't be going into heavy boost loads until the car is warmed up. Below 3K is going to avoid boosting. 4K you will be boosting (although not full boost).


    No.. boost is not RPM dependent. I can hit full boost at 3100rpm, or I can rev to 5000rpm with no boost, they are virtually unrelated. What we're looking to limit here are piston speeds and cylinder pressure.

  15. #14
    Registered User Ingo's Avatar
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    When I go to work in the morning I have to go up a hill first. So I start, let it run maybe a minute while I pick up the newpaper and bring it inside. Then I go up the hill, shifting at 3k, that bring me into next geat at 2k. 2nd and 3rd gears. At the top I go into 4th still under easy acceleration. Then heating starts to work and I feel better about pushing it more....
    You can't have everything - where would you put it?

  16. #15
    MAINEiac 11blackSTi's Avatar
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    Quote Originally Posted by MainFrame View Post
    No.. boost is not RPM dependent. I can hit full boost at 3100rpm, or I can rev to 5000rpm with no boost, they are virtually unrelated. What we're looking to limit here are piston speeds and cylinder pressure.
    I'm assuming you have some way of controlling your boost? There is no way my car would rev to 5000 rpms without my turbo kicking in. Higher rpms means more exhaust flow, which speeds up the turbo spool, which forces more air into the cylinders, no?

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