Anyone know the mathmatical forumula for...
Thread Starter
On The Tree
Joined: Jan 2002
Posts: 161
Likes: 0
From: South Florida, 33071
Anyone know the mathmatical forumula for... Does any one know the formula for figuring out a given rpm if you know the rear gearing, over all tire diameter and the transmisison gear at a certain speed?
I don't know how to do it and would like to know.
Like, what rpm will i be turning with 4.10 gears in a six speed car with stock 17 inch SS wheels and tires?
That's a hypethetical question. I want the forumula for how to calculate that kind of info.
Thanks guys,
Alan
<small>[ September 30, 2002, 06:02 PM: Message edited by: NewZ ]</small>
I don't know how to do it and would like to know.
Like, what rpm will i be turning with 4.10 gears in a six speed car with stock 17 inch SS wheels and tires?
That's a hypethetical question. I want the forumula for how to calculate that kind of info.
Thanks guys,
Alan
<small>[ September 30, 2002, 06:02 PM: Message edited by: NewZ ]</small>
Re: Anyone know the mathmatical forumula for... http://www.f-body.org/gears/
I can write it out if you need it but this is easier. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
I can write it out if you need it but this is easier. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
TECH Enthusiast
Joined: Nov 2001
Posts: 678
Likes: 0
From: Kemah, TX
Thread Starter
On The Tree
Joined: Jan 2002
Posts: 161
Likes: 0
From: South Florida, 33071
Re: Anyone know the mathmatical forumula for... Thanks guys but does anyone know the actual formula? I'd like to be able to do it on paper when i need it and not have to rely on the computer to do it for me.
Thanks!
Alan
Thanks!
Alan
TECH Enthusiast
Joined: Apr 2002
Posts: 588
Likes: 0
From: Chesterton, IN
Re: Anyone know the mathmatical forumula for... Well, you could do this:
R = [RPM]
T = [transmission gear ratio (eg: 3.4:1 would be 3.4)]
F = [final drive ratio (rear end gear, as in 3.42 or 4.10)]
C = [circumference of rear tire in feet]
Fm = ((R/T)/F) * C [feet per minute]
Mm = Fm/5280 [miles per minute]
Mh = Mm/60 [miles per hour]
So. Mh = ((((R/T)/F)*C)/5280)/60
Am I close? <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
R = [RPM]
T = [transmission gear ratio (eg: 3.4:1 would be 3.4)]
F = [final drive ratio (rear end gear, as in 3.42 or 4.10)]
C = [circumference of rear tire in feet]
Fm = ((R/T)/F) * C [feet per minute]
Mm = Fm/5280 [miles per minute]
Mh = Mm/60 [miles per hour]
So. Mh = ((((R/T)/F)*C)/5280)/60
Am I close? <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
TECH Enthusiast
Joined: Apr 2002
Posts: 588
Likes: 0
From: Chesterton, IN
Re: Anyone know the mathmatical forumula for... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by red ws6 99:
<strong>Bring up either of the webpages, and either right click on the page and select source or select view then source. That will show you the source code for the webpage. You will see the formula in there.
Gary</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Assuming that the page is javascript (ick)
<strong>Bring up either of the webpages, and either right click on the page and select source or select view then source. That will show you the source code for the webpage. You will see the formula in there.
Gary</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Assuming that the page is javascript (ick)
Re: Anyone know the mathmatical forumula for... Engine Rpm * Tire Diameter/ axle ratio / 336 = speed <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" /> <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" />
Trending Topics
Re: Anyone know the mathmatical forumula for... The unit for tire diamter is inches. Stock is 25.6 but when I calculate it comes out to be 25.1 according to the drag strip. Not sure if the tire diameter is slightly shorter when loaded. That is the toughest part about calculating vehicle speed, is figuring out the actual diamter of a loaded tire. Slicks are <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> because they seem to grow at high speeds. I have never got a straight answer to how much because they are all different depending upon sidewall height and etc.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
TECH Fanatic
Joined: Nov 2001
Posts: 1,190
Likes: 0
From: Las Cruces, NM
Re: Anyone know the mathmatical forumula for... Bring up either of the webpages, and either right click on the page and select source or select view then source. That will show you the source code for the webpage. You will see the formula in there.
Gary
Gary
Thread Starter
On The Tree
Joined: Jan 2002
Posts: 161
Likes: 0
From: South Florida, 33071
Re: Anyone know the mathmatical forumula for... Now i'm more confused than i was before i started. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Alan
Alan