Ratios/RPM/MPH
- Thread starter Mesa
- Start date
I used this program, easy download and install, no microsoft excel required...
http://locost7.info/gearcalc.php
I also have somewhere excel from that trans as I have one in the RCRGT40 that is going together if this doesn't work let me know I can dig it up...
Sandy
http://locost7.info/gearcalc.php
I also have somewhere excel from that trans as I have one in the RCRGT40 that is going together if this doesn't work let me know I can dig it up...
Sandy
Sandy, come on, the formula is so simple, and if you want to see a chart with all the speeds, etc, MS Excel is actually pretty nice.
here's the basics, Rob:
MPH = (RPM * Tire Radius)/(Final-Gear-Ratio*168)
Final Gear ratio is gear ratio * final drive
Tire Radius in inches
or Solving for RPM we have
RPM = 2*FGR*168*MPH/D
Mitch D
here's the basics, Rob:
MPH = (RPM * Tire Radius)/(Final-Gear-Ratio*168)
Final Gear ratio is gear ratio * final drive
Tire Radius in inches
or Solving for RPM we have
RPM = 2*FGR*168*MPH/D
Mitch D
Thanks Sandy and Mitch,
I used Sandy's deal, it was easy,fast, I could plug and play. Sandy, I was at RCR not to long after your visit, I am thinking on a 930 because like you I dont want to blow the thing if I get a little (OK a LOT) over exuberent. I don't know if this group offers private mail but I'd like to talk to you about your tranny if you wouldnt mind.
Thanks
Rob
I used Sandy's deal, it was easy,fast, I could plug and play. Sandy, I was at RCR not to long after your visit, I am thinking on a 930 because like you I dont want to blow the thing if I get a little (OK a LOT) over exuberent. I don't know if this group offers private mail but I'd like to talk to you about your tranny if you wouldnt mind.
Thanks
Rob
Just click on my name I think you will get to the Private mail area, or you can just use sganz [at] pacbell.net
If I did the formulas into excel it likely would become a week long project of graphing, gear change charts, etc. The little program is nice and simple and all I had to do was be lazy and use it /ubbthreads/images/graemlins/smile.gif I do have a nice one that I got from Emco gears but almost overkill. This one was just right /ubbthreads/images/graemlins/smile.gif
I'm a lazy software engineer, and as such I'll happily reuse other work to save time for other things /ubbthreads/images/graemlins/beerchug.gif
Sandy
If I did the formulas into excel it likely would become a week long project of graphing, gear change charts, etc. The little program is nice and simple and all I had to do was be lazy and use it /ubbthreads/images/graemlins/smile.gif I do have a nice one that I got from Emco gears but almost overkill. This one was just right /ubbthreads/images/graemlins/smile.gif
I'm a lazy software engineer, and as such I'll happily reuse other work to save time for other things /ubbthreads/images/graemlins/beerchug.gif
Sandy
I was just kidding a bit, Sandy. /ubbthreads/images/graemlins/wink.gif That tool you posted is terrific. Sometimes it's handy to know how to calculate manually too.
I was with Oracle during it's halcyon days for more than 10 yrs, so I know what you mean about using "prepackaged" applications. You'll get no disagreement out of me regarding the benefits of using something already written by someone else.
Mitch D /ubbthreads/images/graemlins/beerchug.gif
I was with Oracle during it's halcyon days for more than 10 yrs, so I know what you mean about using "prepackaged" applications. You'll get no disagreement out of me regarding the benefits of using something already written by someone else.
Mitch D /ubbthreads/images/graemlins/beerchug.gif
Mitch - I know you were, I'm just jacked up on coffee today as I was up late working on the Cobra trying to get it out of my garage. Oracle, hmm, need a job DBA/DBE work available /ubbthreads/images/graemlins/smile.gif
When Ron does up the new site I think things like this (useful links etc) should be promoted to a seperate section or something like Yahoo Groups has for downloads. Just an idea.
Sandy
When Ron does up the new site I think things like this (useful links etc) should be promoted to a seperate section or something like Yahoo Groups has for downloads. Just an idea.
Sandy
Here are two decent sources for automath.
1) "smokemup.com" Good web site, with many HP calculations, acceleration and ET formulas (you just fill in the blanks), air/fuel/injector requirements for xxx HP etc.
Some stuff is free, the rest (including drag strip trees and competing against the computer) comes for $5.00 per 3 month subscription.
2) For the do it yourselfers, there's the 'Automath' handbook by John Lawlor. Old, but there are formulas for everything from Optimum shift points to MPH per RPM, CR, Brake and indicated horsepower vs. torque and on and on.
Check them out.
Alohas, Mike
1) "smokemup.com" Good web site, with many HP calculations, acceleration and ET formulas (you just fill in the blanks), air/fuel/injector requirements for xxx HP etc.
Some stuff is free, the rest (including drag strip trees and competing against the computer) comes for $5.00 per 3 month subscription.
2) For the do it yourselfers, there's the 'Automath' handbook by John Lawlor. Old, but there are formulas for everything from Optimum shift points to MPH per RPM, CR, Brake and indicated horsepower vs. torque and on and on.
Check them out.
Alohas, Mike
Here is another one from the creators of the Mega Squirt EFI (Bruce bowling and Al Grippo).
http://www.bgsoflex.com/auto.html
The have lots of standard calcs as well as some odd ones like 'Design your own Internal Combustion engine' stuff like that. Free too. The web is a nice thing!
Sandy
http://www.bgsoflex.com/auto.html
The have lots of standard calcs as well as some odd ones like 'Design your own Internal Combustion engine' stuff like that. Free too. The web is a nice thing!
Sandy
Similar threads
- Locked
