Boost in gears?
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This is a discussion on Boost in gears? within the New Member Hangout forums, part of the Community - Meet other Enthusiasts category; This may be a complete noob question, but are there limits on how much boost there is available in the ...

  1. #1
    Registered User XRedJar's Avatar
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    Boost in gears?

    This may be a complete noob question, but are there limits on how much boost there is available in the different gears?

    I'm breaking mine in, and have 400+ miles on it now, but have on occasion run up to about 5lbs of boost on the gauge in 3rd, 4th, and 5th gears. Never for very long, but then I remembered something about the amount of boost being depending on the gear you are in.

    I've been very careful in 1st and 2nd not to get into boost, but did not know if I should be doing things differently or if I'm doing it right.

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  3. #2
    Subaru Newb MainFrame's Avatar
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    That's fine, just remember not to cruise at one RPM.. Boost is dependent on load, so at WOT the car will make the most boost in 5th gear, less boost in 3rd, less in 2nd, and even less in 1st.

  4. #3
    Registered User XRedJar's Avatar
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    Thanks, just wanted to make sure I was not running it too hard during break-in.

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    Registered User Heide264's Avatar
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    For the record, in (at least the newer) models, there are per gear tables in the tune. These allow you to adjust your maximum duty cycle and target boost in each gear if done carefully.
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  6. #5
    Pro Manscaper Mikie13's Avatar
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    Different gears also allow for different amounts of load placed on the engine. This will affect boost. You'll see peak/highest boost possibly in 3rd gear, but especially in 4th when at WOT.
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    Master Baiter EJ257's Avatar
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    A little bit of boost is good for the car during break-in.
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  8. #7
    Registered User XRedJar's Avatar
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    Thanks for all the responses!! First turbo car for me, and I didn't think I was running harder than I should be....but thought I'd ask to confirm. Right now I'm getting close to 500 miles and have been running it as smooth as I can, keeping max revs to about 4k and varying the revs.

    I've got the SPT boost gauge and have not had it go over 5lbs so far.

    Going to upstate PA for Thanksgiving....and taking mostly back roads (all there is in PA...lol). Should get a good workout going up over the mountains.

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