D3vst8r96gt Posted July 29, 2012 Report Share Posted July 29, 2012 MPH = (RPM x CIR) / (gear x final drive x 1056)that is the math portion, but kep in mid this has no aero factor, no drag factor (as in tire drag/gravity) and no expanding of the tire is accounted for ......MPH is gonna be your maxRPM is gonna be the rev limiter (lets say 6500rpm)multiply that by thisCIR is the circumference of the tire in CM *requires more math see the 2nd post* (305/35r18 is 82.8 cm)Nexttake the "gear" aka what the gear is in the transmission (5th in a t-45 is .67)multiply that by the "final drive" aka your rear end gear (stock for most people is 3.27)multiplythat by 1056 (fuck your coeffcient of 336)it comes out to 2,313.5904.... ok 2,313.6 is fineso 538,200 divided by 2,313.6 makes 232.62448 so in theory you could drive 232 and half MPH if you existed in zero drag/gravitythis is very simplified....... im not exactly sober so yeah Link to comment Share on other sites More sharing options...
D3vst8r96gt Posted July 29, 2012 Author Report Share Posted July 29, 2012 3.14 x diameter .......circumference Link to comment Share on other sites More sharing options...
D3vst8r96gt Posted July 29, 2012 Author Report Share Posted July 29, 2012 BTW i messed up the circumference of the tire 305/35 is metric 18 is in inches lol ....... Link to comment Share on other sites More sharing options...
330CubeGt Posted July 29, 2012 Report Share Posted July 29, 2012 Nice post, reminds me why I never went to college :/Heads up and ass kickin! Using Tapatalk 2 Link to comment Share on other sites More sharing options...
D3vst8r96gt Posted July 29, 2012 Author Report Share Posted July 29, 2012 drunk and avoiding calculus made us avoid college? lol ..... Link to comment Share on other sites More sharing options...
Slykin Posted July 29, 2012 Report Share Posted July 29, 2012 I wish all of this didn't make any sense. I tried working this out in my head while driving on a 2 hour trip the other day... needless to say I got bored and had trouble without paper. Link to comment Share on other sites More sharing options...
D3vst8r96gt Posted July 29, 2012 Author Report Share Posted July 29, 2012 I wish all of this didn't make any sense. I tried working this out in my head while driving on a 2 hour trip the other day... needless to say I got bored and had trouble without paper. sadly this is without any drag whatsoever! so if youre in space this is for you!!!i can calculate it as sealevel but yeah it gets crazy from then on ........... this is the simpliest form lolif you must change 1056 to 336 that will get you closer to earthly point of view ...... its the automotive industry standard for topspeed calculation avoiding hp etc. Link to comment Share on other sites More sharing options...
Slykin Posted July 29, 2012 Report Share Posted July 29, 2012 Bleh. It's too late for drag coefficients. Link to comment Share on other sites More sharing options...
D3vst8r96gt Posted July 29, 2012 Author Report Share Posted July 29, 2012 Bleh. It's too late for drag coefficients.I know bro!!!! plus im drun as shit....i kinda wanna call the cop just to outrun someone Link to comment Share on other sites More sharing options...
330CubeGt Posted August 2, 2012 Report Share Posted August 2, 2012 What about if there is a tail wind? Link to comment Share on other sites More sharing options...
Det_Riot Posted August 2, 2012 Report Share Posted August 2, 2012 or your car is covered with golf ball dimples? Link to comment Share on other sites More sharing options...
