top speed 4:10's in 4th ????????

Discussion in 'SVT Tech Forum' started by chrisbudl1, Aug 21, 2005.


  1. chrisbudl1

    chrisbudl1 New Member

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    My 97 only wants to go up to 120 or so. thats about 6000 rpm in fourth. does that sound right? I think something is up with my car somewhere? :shrug:
    #1
  2. missouri_guy197

    missouri_guy197 New Member

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    6800rpms in 4th gear with 4.10's should take you to about 127mph...

    120mph should be about 6400rpms in 4th...
    #2
  3. SVT98Snake

    SVT98Snake New Member

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    Speedo may not be calibrated correctly??
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  4. missouri_guy197

    missouri_guy197 New Member

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    Possibly...

    Chris, did you use the white speedo gear or a speedcal to calibrate your speedometer?
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  5. chrisbudl1

    chrisbudl1 New Member

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    Good, I thought something was wrong with my car. it should still pull in fifth then right. what ratio does 5th end up with, with the 4:10's?
    #5
  6. missouri_guy197

    missouri_guy197 New Member

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  7. 99blkcobravert

    99blkcobravert New Member

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    Do you have a chip or tune that removes the speed limiter in the EEC?
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  8. chuckstang95

    chuckstang95 Member

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    After a bunch of highway blasts, I have decided I do not like 410s on the highway because I can no longer keep it in 4th gear. You have to shift into 5th at about 125, and that means if your racing at around 110 or more in 4th your way up there in the revs and once you shift into 5th, you lose ALOT of acceleration. Oh well, now the fun just stops at 125 lol instead 150 or 160 or whatever...I would not know :)
    #8
  9. missouri_guy197

    missouri_guy197 New Member

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    If you aren't ahead by 125 then you lost and should probably slow down because you aren't going to catch them anyways...

    Besides, there's no point to going that fast on the streets...
    #9
  10. chuckstang95

    chuckstang95 Member

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    lol
    well hey now, when your going against an 03 you need every bit of power from every gear hahaha
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  11. chrisbudl1

    chrisbudl1 New Member

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    basically, I run away from most, until the top of fourth, then it is about time to let off anyways, and then some of the cars pass me. But yeah 125 in a 60, and coming up on traffic, better have good brakes. just curious, I was told that I should still hit 154 in fourth, and thought because of bad vibrations, the car was looseing power. This is where a blower comes in to play right, and maybe some cams? anybody have any extra money? chris
    #11
  12. missouri_guy197

    missouri_guy197 New Member

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    Nope, with 4.10's you'll top out at 126-127...it's the way the gearing works, but in 5th you'll be able to go past 152 since the car will still pull in 5th with the 4.10's where with stock 3.27's it won't pull in 5th after a certain speed...
    #12
  13. chrisbudl1

    chrisbudl1 New Member

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    is that when you hit the salt flats?? what kind of space do you need for that and to stop?
    #13
  14. Iwvustang

    Iwvustang Founding Member

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    If I knew the ratio on your 4th gear I could probably give you an estimate.
    #14
  15. missouri_guy197

    missouri_guy197 New Member

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    Um....all mustang 4th gears are 1:1 if they are manual transmission...
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  16. chrisbudl1

    chrisbudl1 New Member

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    anybody ever get a chance to totaly open up your cars, with plenty of room to accelerate, and decelerate?
    #16
  17. c.wood

    c.wood Founding Member

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    That sounds about right. I run a Tremec 5 speed in my Capri, and I go through the traps (at the end of the 1/4 mile) at about 106 turning 5,800 RPM with a 235/60/15 drag radial (a 26.1" tall tire, about the same diameter as your tire.
    #17
  18. tomustang

    tomustang Psychotic Member Founding Member

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    127 sounds about right for 4th.
    #18
  19. chrisbudl1

    chrisbudl1 New Member

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    from reading your responses, I think the cobra's allright. I did turn the driveshaft three times, to get the vibrations down, that was a pain, in the driveway. Thanks for all the help, that gear comparison page was very informative. chris
    #19
  20. chuckstang95

    chuckstang95 Member

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    I just used to like how with my 327s I could be in 4th gear going 120 and not have to keep my revs at 5k and more. Honestly Im too scared to shift into 5th at 125ish and keep my foot planted.
    Oh and yes good brakes do help...I recommend powerslots slotted rotors and hawk pads.(nice improvement over stock)
    #20

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