Visual RPM/Speed Calculator Will Leave you Vroom Vrooming in Your Cube

Visual Automotive Ratio Calculator
The Mad_Science Falcon in action

Second only to flogging the living daylights out of our rides, we hoons love to scheme. For every hour spent under the car in the driveway, there are 8 more spend BSing on forums, browsing through catalogs and generally fussing about what we’re gonna do with the Country Sedan Falcon Uberbird Wrangler WRX Trailer latest project car.
For hoons in the know, gearing is the killer app. Without the proper mix of tire size, rearend and transmission gearing, you’ll be bogging your puny 260ci or revving the hell out of your 390. Oddly enough, salvation comes at the hands of a sub-page on the long-dormant You put in your transmission, rear-end and tire size, and it does the rest, complete with the spiffy visual readout you see above. Sure, you could do the same with a spreadsheet, but it wouldn’t be as cool. Check it out at
Hat tip to Ridelust

Leave a Reply

Your email address will not be published. Required fields are marked *

The maximum upload file size: 64 MB. You can upload: image, audio, video. Links to YouTube, Facebook, Twitter and other services inserted in the comment text will be automatically embedded. Drop files here

  1. muthalovin Avatar

    Uh oh. This is not a great thing for productivity to discover first thing in the morning. Oh well.

  2. LTDScott Avatar

    Scheming! That's what I'm going to tell my girlfriend when she questions why I spend all my damn free time online researching car stuff.

  3. lilwillie Avatar

    My day is shot.
    Thanks, really. I do mean it. I am sick of doing the math on paper for people then they try to argue it. This is easy, "here, look at the pretty dials damn it."

  4. JeepyJayhawk Avatar

    Yeah, this doesn't help the lust for larger tires… 31s will drop my rpm by 100-200 revs… hmm will I miss that power?

  5. bigev007 Avatar

    Huh, my car is geared for 200mph at 5030 rpm and 60 in reverse at 5300. Seriously 200mph gearing? I drive a 3.4L Impala. Explains the awesome highway mileage though.

  6. engineerd Avatar

    This is pretty cool. My car is good to 200 mph in 2nd gear, apparently. Of course, I'll be spinning 15,000 rpm. I can't wait to get that F1 engine!

  7. RSDeuce Avatar

    This came out to be very accurate for my car. Cool stuff.

  8. jeremy![™] Avatar

    well then, something is amiss…

  9. buddy Avatar

    Does this work for mountain bikes?

  10. lilwillie Avatar

    Speaking of 390…The Edsel with 4:10's and 14 inch tires runs a nice 2975RPM at 55mph. Hell YA!

  11. Benito Avatar

    And I have a paper to write. Oh well, ets see what the T/A would be like with the 1LE rear axel and 17"s….

  12. FuzzyPlushroom Avatar

    195/70/14 is, in fact, the correct tire-size answer. Thanks for playing!

  13. SVT2888 Avatar

    This just helps me with arguments I've had with people because they do not believe that I've taken my car to a certain speed with my 3.73 gears…