RPM-MPH chart for W58 & stock wheels/tires - Page 2

Page 2 of 13 FirstFirst 123412 ... LastLast
Results 11 to 20 of 121
  1. #11
    120 is a lot short of 160 though

  2. Remove Advertisements
    CelicaSupra.com
    Advertisements

  3. #12
    hmmm, i cant really claim a verified 5th gear max speed, however when i maxed out 4th in my 4.30 rear p-type the state trooper said i was going 110 mph.

    that is going totally from him though since my speedo starts swinging back and forth pretty wildly after about 90 mph.

  4. #13
    CelicaSupra.com Member joefoe's Avatar
    Join Date
    Sep 2003
    Location
    Courtenay BC (Island Life)
    Posts
    862
    I can do it easy! but it an't no stocker....
    Just an 82 supra Hidden Content

  5. Remove Advertisements
    CelicaSupra.com
    Advertisements

  6. #14
    Quote Originally Posted by Ross
    120 is a lot short of 160 though
    sure is, i was simply trying to make the point that 120 is easy, and i should have elaborated on that.

    120 mph isnt hard, with a mostly stock, unknown milage low compression 82.

    the problem with cars is, once you reach a certain speed, thats it, your aerodynamically limited, drag is equal to the forward motion provided by your drivetrain.
    as you get faster, it takes considerably more power to go any faster.
    look at modern cars and compare the gearing, power, weight, friction, and drag.
    then look at their top speed.

    usually, if you can find a car with everything else the same, except drag, your gonna notice a huge difference in top speed.

    basically what my long rambling confused post is trying to say is that i dont think a mkII is possible of an honest 160mph without insane power.

    its easy to read a speedo and say my car does 120 or 150 or whatever, but we all know stock instruments are pretty inaccurate.
    anyone wanna go to bonneville and bring a hot supra??

  7. #15
    CelicaSupra.com Member
    Join Date
    Mar 2003
    Location
    Clifton NJ
    Posts
    2,800
    Power goes as the speed cubed so if 161 hp gives u 127mph (car and driver top speed as i remember) then u need 161* (140/127)^3 or 216 hp
    to get to 140 mph. prolly a little more hp required since wp losses prolly get horrific at 6500 rpm.

  8. #16
    According to StanS formula, how much power would it take to do 160 MPH with a 3.7 diff?
    Just wondering, and too lazy to work it out myself.
    I think that formula may be a little simplistic, as it doesn't take into account aerodynamics and drag, as mentioned by dogstar.
    (I should have mentioned the drag myself, which is why I said it would take an awful lot of power to hit 161)

  9. #17
    OK I worked it out using StanS supplied formula = 328 hp
    I still think it would require more than this though.
    It's just a gut feeling, I don't have any proof, but I would expect you to need at least 350 and maybe 400 hp

  10. #18
    Strange. I routinely accelerate onto the freeway in 2nd gear. when I am going 100kms(60mph) I am only at about 5000rpm not 6000

  11. #19
    CelicaSupra.com Member
    Join Date
    Mar 2003
    Location
    Clifton NJ
    Posts
    2,800
    as it doesn't take into account aerodynamics and drag,
    It does take aero and drag into account since the same car is used in both cases. It doesn't take non-linear losses (such as wp losses) with rpm into
    account. I'm only guessing that wp losses are not linear i.e. double the
    rpm and get more than double the loss.

  12. #20
    CelicaSupra.com Member
    Join Date
    Mar 2003
    Location
    Clifton NJ
    Posts
    2,800
    In fact the formula is solely based on aero drag. It predicts the power
    required to move the car at any speed. Gearing has nothing to do with it. Gearing only keeps the motor operating in it's design rpm range. Gearing will require different motor Torque so the motor will produce the required hp predicted by the aero based formula.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts