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40 mph at 1000 rpm??!?!?

This is a discussion on 40 mph at 1000 rpm??!?!? within the Firebird / WS6 forums, part of the Vehicle Specific category; Just like the title says, does that sound right to you? below is what i have done to the car. ...

  1. #1
    Senior Member clg82's Avatar
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    2000 Trans Am

    40 mph at 1000 rpm??!?!?

    Just like the title says, does that sound right to you? below is what i have done to the car. would anything affect this? or should i get my shift points retuned? someone help please!!!
    2000 Arctic White trans am, ws6 hood, ws6 air box, slp lid, slp smooth bellows, slp loudmouth exhaust,shift kit, rebuilt trans, LS6 intake, 3.73 gears, Shaner S3 p/p throttle body, and a tune . SFC. C6 ZO6 rims 18" in back 17" in front. Drilled and slotted rotors.

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    NY Representative basballny2's Avatar
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    2001 ws6

    not 100% sure but i believe the 3.73 gears mean ur an m6.....if so then theres nothing wrong with that.....at 65mph im at 1400 RPM in 6th......wut gear are u in when ur doing 40?

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    Must be an A4 if talking about getting shift points retuned. Check out a RPM/MPH calculator like www.f-body.org/gears/ Did you get the PCM tuned for the new gears?

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    OK, just re-read your signature - you don't have 3.73's yet, right? According to that calculator with stock tire diameter 1000 RPM at 40 MPH is spot on for 2.73's in 4th.

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    Senior Member clg82's Avatar
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    2000 Trans Am

    Quote Originally Posted by 2001NBMZ28 View Post
    OK, just re-read your signature - you don't have 3.73's yet, right? According to that calculator with stock tire diameter 1000 RPM at 40 MPH is spot on for 2.73's in 4th.
    Haven't gotten the gears yet! But I have the performance axle (3.23). I have been having this problem since I had the tranny rebuilt, and a shift kit installed at the same time. Could this have something to do with it and would a tune fix it?

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    Yo Da Lin The Valley..... astyles's Avatar
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    Quote Originally Posted by 2001NBMZ28 View Post
    OK, just re-read your signature - you don't have 3.73's yet, right? According to that calculator with stock tire diameter 1000 RPM at 40 MPH is spot on for 2.73's in 4th.
    yep thats what mine runs

  7. #7
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    Maybe the difference is the diameter of the 18's? That calculator lets you change the diameter or put in different tire sizes too, then recalculates. But yes, whatever is going on a tune can get your speedo right.

  8. #8
    Impounded
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    I loved freeway racing with 2.73s, that why i took my old formula cross country

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