| Author | Message | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 1248 Registered: 10-2006 Posted From: 99.153.142.249  Rating: N/A |
Have no idea how I lost a book mark , but could anyone post a link to the Darris B site with the fantastic RPM vs gear ratio vs tire size computer? TIA, FF | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 1935 Registered: 10-2003 Posted From: 71.58.71.157  Rating: N/A |
www.thebouthilliers.com/4106 | ||
| Tom Christman (Tchristman)
Registered Member Username: Tchristman Post Number: 236 Registered: 1-2006 Posted From: 66.218.33.156 Rating: N/A |
That calculator at thebouthilliers is incorrect. It says to use the actual diameter of the tire for calculations. That's fine, but you'll always be off by 1.6-1.7mph from the rolling radius advertised with a tire company. If that doesn't bother you-then great! My 11/R-24.5 tire is 476rpm, times 4.56 rear end, times .88 final drive (V730) equals 1910rpm at 60mph. Easy to do yourself. Good Luck, TomC | ||
| RJ Long (Rjlong)
Registered Member Username: Rjlong Post Number: 1707 Registered: 12-2000 Posted From: 71.195.124.20  Rating: N/A |
Tom - Even your calc is off a little, 'cause you rounded UP the bevel gear ratio of the V-730. (0.875 actual vs 0.88 used) " If that doesn't bother you-then great!" Hehehehehe  | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 1252 Registered: 10-2006 Posted From: 99.153.142.249 Rating: N/A |
"It says to use the actual diameter of the tire for calculations. That's fine, but you'll always be off by 1.6-1.7mph from the rolling radius advertised with a tire company." To find the actual diameter the drill is a chalk mark, count 10 revolutions and do da math. OFF by 1 mph is just fine for my mental masturbation. I also discount the increase in tire diameter from centrifugal force at 75, and the larger diameter when being at Denver , where the gravity is less than Miami! YRWV FF | ||
| Buswarrior (Buswarrior)
Registered Member Username: Buswarrior Post Number: 1889 Registered: 12-2000 Posted From: 174.91.140.242  Rating: N/A |
And here's Mallie's calculator, since we're on the topic: http://www.cwis.net/~mallie/page12.html happy coaching! buswarrior | ||
| Ian Giffin (Admin)
Board Administrator Username: Admin Post Number: 1367 Registered: 7-1997 Posted From: 24.239.15.161  Rating: |
No, this is not the first time the word "masturbation" has appeared on this web site. Thought you'd like to know. Thank you, Fast, for both instances. Ian www.busnut.com | ||
| Buswarrior (Buswarrior)
Registered Member Username: Buswarrior Post Number: 1896 Registered: 12-2000 Posted From: 174.91.144.79 Rating: N/A |
EH?? happy coaching! buswarrior |
