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what speed is 5k in 4th?

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  • what speed is 5k in 4th?

    I know someone posted the gear ratios around here a while ago... but i haven't been able to find them right now. I'm just tired of not knowing how fast i'm going. I'm also thinking about making a spedo card with the numbers spaced correctly to compensate for my larger tires.

    so i have a stock festiva 5spd trany, 175/70/13 tires, and i was turning 5100 rpm in 4th gear (then i ran out of road..). How fast was i going?
    Last edited by skeeters_keeper; 07-19-2008, 01:54 AM. Reason: update title
    ~Nate

    the keeper of a wonderful lil car, Skeeter.

    Current cars:
    91L "Skeeter" 170k, Aspire brakes, G15, BP, Advancedynamics coil overs, etc. My first love.
    1990 Kawasaki Ninja 250 - my gas saver, 60+mpg - 40k
    2004 MotoGuzzi Breva - my "longer range" bike - 17k

    FOTY 2008 winner!

  • #2
    i did this for 5.0zone a while back, hope this helps


    1988 323 Station Wagon - KLG4 swapped
    1988 323 GT - B6T Powered
    2008 Ford Escape - Rollover Survivor

    1990 Festiva - First Ever Completed KLZE swap (SOLD)

    If no one from the future stops you from doing it, how bad of a decision can it really be?

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    • #3
      get a GPS and it tells you how fast you are going ....... worked great when I stuck the 14's on for a bit....I was about 3mph off....
      "FLTG4LIFE" @FINALLEVEL , "PBH"
      89L Silver EFI auto
      91GL Green Auto DD
      There ain't no rest for the wicked
      until we close our eyes for good.
      I will sleep when I die!
      I'm a little hunk of tin, nobody knows what shape I'm in. I've got four wheels and a running board, I'm not a Chevy, I'M A FORD!

      Comment


      • #4
        Nate, Dirt is absolutely right. GPS is the answer. I know one of your friends must have one. Or a phone with gps.
        youtube.com/neanderpaul 88 festiva LX w/BP G25 MR 5 speed waiting for wiring- 93 Festiva GL auto w/ air, waiting for B6t/G4A-HL - 98 Nissan Quest - 02 Mazda protege 5 wife's DD

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        • #5
          1st:3.454:1
          2nd:1.944:1
          3rd:1.275:1
          4th:0.861:1 (Overdrive!)
          5th:0.692:1 (2nd Overdrive!)
          Rev:3.583:1 Just so you know what you are doing in R (Race)
          Final Drive Ratio 3.777:1
          Speedometer Gear Ratio 0.91:1
          Have owned 9 so far
          White 89 L converted to LX "The Curmudgeon" Being a Curmudgeon right now.
          Blue 89 L converted to LX "Shtinky" FMS crate engine,cam,flywheel,hail dents
          Smurf Blue 90 LX "Smurffy" He Ran Away From Home!!!!!! Says Willie loves him more than I did!
          Red 88 L converted to LX "Rasta, Mon" Now retired
          Where did all these @#*&%$ Toyotas come from around here?

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          • #6
            wow, 4th and 5th are OD? interesting!
            thanks m715, thats the info i was looking for. a GPS would be nice, i know a few ppl with them i think, i'll have to see if i can borrow one, i just would like to be able to read my speed from the tach after the spedo is buried. i'm pretty sure at about 5.1k in 4th i'm turning 100-105mph, i'll run the #'s when i get home later.
            ~Nate

            the keeper of a wonderful lil car, Skeeter.

            Current cars:
            91L "Skeeter" 170k, Aspire brakes, G15, BP, Advancedynamics coil overs, etc. My first love.
            1990 Kawasaki Ninja 250 - my gas saver, 60+mpg - 40k
            2004 MotoGuzzi Breva - my "longer range" bike - 17k

            FOTY 2008 winner!

            Comment


            • #7
              After running the numbers through a calculator, I get 105.62 MPH.

              For a 175/70-13 tire, 3.777:1 final drive and .861:1 4th gear

              Section Width = 175mm, 6.9"
              Aspect ratio =....70%
              70% of 6.9" = 4.83"
              4.83" x 2 = 9.66"
              9.66" + 13" (rim) = 22.66" tire diameter
              Diameter (22.66") x pi (3.141592654) = circumference. 71.18"
              71.18" = Distance traveled per revolution
              Divided by 12" = 5.932 feet per revolution

              Now gears.

              3.777:1 final drive x .861:1 4th gear = 3.25:1

              5100 RPM / 3.25 = 1569.23 RPM at the wheels

              The tire will move 5.932 feet per rev. so 5.932 x 1569.23 = 9294.55 feet per minute

              Need to multiply by 60 for hour, so...

              9294.55 x 60 = 557672.95 feet per hour

              1 mile = 5280 feet

              Divided by 5280 feet gives miles per hour, which is...

              105.62

              Keep in mind that this is "theoretical speed". Tires rarely exactly equal their mathematical size.
              Last edited by JPT; 07-18-2008, 06:51 PM. Reason: addition
              Festiva: Because even my dog can build a Honda.
              ---------------------------------------------------------------------------

              '90 L. B8ME/Kia Rio 5 speed. Rio/Aspire suspension swap. :-D
              '81 Mustang. Inline 6, Automatic.
              '95 Eagle Summit Wagon. 4G64 Powered.

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              • #8
                100 -105 was EXACTLY my guess but I didn't want to say it for some reason.
                youtube.com/neanderpaul 88 festiva LX w/BP G25 MR 5 speed waiting for wiring- 93 Festiva GL auto w/ air, waiting for B6t/G4A-HL - 98 Nissan Quest - 02 Mazda protege 5 wife's DD

                Comment


                • #9
                  ^ That's Hilarious, 'bout hurt myself laughing.
                  Steve GT

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                  • #10
                    thanks festivafan! you saved me a little bit of trouble looks like i guessed it right on!

                    after the exhaust is fixed i'll have to get on a nice piece of hwy and see what skeeter can do, i was just on a little 2 lane rd this am!
                    ~Nate

                    the keeper of a wonderful lil car, Skeeter.

                    Current cars:
                    91L "Skeeter" 170k, Aspire brakes, G15, BP, Advancedynamics coil overs, etc. My first love.
                    1990 Kawasaki Ninja 250 - my gas saver, 60+mpg - 40k
                    2004 MotoGuzzi Breva - my "longer range" bike - 17k

                    FOTY 2008 winner!

                    Comment


                    • #11
                      RPM to MPH calculator!


                      OK, i just took a few minutes and wrote up a calculator in C++. With it you need to enter the tire size (circumference in inches, you get get that from tirecalc online), gear
                      (including reverse!), and RPM, and it will tell you your predicted MPH.

                      it should work for 4 or 5 speed festiva transmissions, but not not anything with different trany's.
                      its a .exe file in a zip folder, only about 130kb... let me know if you find any glitches:

                      dislike404.com offers free, automated website error monitoring. Easily track and fix HTTP 404 errors and connection issues to enhance your site's usability.



                      its fun to play with... with my tires in 5th if i could hit 6k i would be doing about 154mph... thats scary 0.o ... also should be able to pull 30mph in reverse, though i don't suggest it! lol!
                      ~Nate

                      the keeper of a wonderful lil car, Skeeter.

                      Current cars:
                      91L "Skeeter" 170k, Aspire brakes, G15, BP, Advancedynamics coil overs, etc. My first love.
                      1990 Kawasaki Ninja 250 - my gas saver, 60+mpg - 40k
                      2004 MotoGuzzi Breva - my "longer range" bike - 17k

                      FOTY 2008 winner!

                      Comment


                      • #12
                        ^ Tried downloading the .zip twice. I keep getting "Corrupted Archive" messages. It could be me, but you may want to try uploading it again.
                        Festiva: Because even my dog can build a Honda.
                        ---------------------------------------------------------------------------

                        '90 L. B8ME/Kia Rio 5 speed. Rio/Aspire suspension swap. :-D
                        '81 Mustang. Inline 6, Automatic.
                        '95 Eagle Summit Wagon. 4G64 Powered.

                        Comment


                        • #13
                          don't right-click/download, just click on the link regular and it will take you to a download page. i just downloaded it twice, once from firefox and once from opera, and it seems to be working fine for me... let me know if that works!
                          ~Nate

                          the keeper of a wonderful lil car, Skeeter.

                          Current cars:
                          91L "Skeeter" 170k, Aspire brakes, G15, BP, Advancedynamics coil overs, etc. My first love.
                          1990 Kawasaki Ninja 250 - my gas saver, 60+mpg - 40k
                          2004 MotoGuzzi Breva - my "longer range" bike - 17k

                          FOTY 2008 winner!

                          Comment


                          • #14
                            Got it. Works just fine.
                            Festiva: Because even my dog can build a Honda.
                            ---------------------------------------------------------------------------

                            '90 L. B8ME/Kia Rio 5 speed. Rio/Aspire suspension swap. :-D
                            '81 Mustang. Inline 6, Automatic.
                            '95 Eagle Summit Wagon. 4G64 Powered.

                            Comment

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