Welcome to the North American Subaru Impreza Owners Club Wednesday June 20, 2018
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Transmission (AT/MT) & Driveline

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Thread Tools Display Modes
Old 09-22-2007, 07:52 AM   #1
Scooby Guru
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
2003 GGA MBP
12.9 / 105+

Default gear ratio calculator/solver

ever wonder what the IDEAL gear ratios would be for your setup?

wonder no longer!

input FD ratio, wheel circumference, desired speed and rpm for some arbitrary 4th gear operating point, what your desired shift bracket [1] is, and solve for a nice, evenly-spaced determination of gear ratios from first through fifth. set your two step once and have it match up perfectly on every upshift! stay right on top of your peak power and maximize your acceleration! get the edge on your competition! sleep with the hottest girls that do the naughtiest things! [2]

the spreadsheet will also show you what your "next gear" rpm would be at any given rpm point, as well as show a chart of rpm vs mph for all gears.

already loaded in the spreadsheet is what i personally consider a very attractive hypothetical gearset. use the fields in red typeface to adjust the parameters to your liking.

disclaimer: this spreadsheet will not manufacture, source, distribute, install or pay for your perfect gear ratios.


have fun!


[1] shift bracket in this context is defined as the desired "upshift at" and "fall to" rpm range.
[2] no guarantee that the gear ratio calculator will achieve any aforementioned claim of sexual activity is expressed or implied. use at your own risk. always wear protection. don't drink and drive.
* Registered users of the site do not see these ads.
ride5000 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 09-22-2007, 08:02 AM   #2
Scooby Specialist
Member#: 77658
Join Date: Dec 2004
Chapter/Region: MWSOC
Location: Pemberville, Ohio
2004 ej207, ppg dogs
3" green, ITS ALL 4 SALE!


Very nice!

...and like your the little CYA at the bottom
Rasmusson14 is offline   Reply With Quote
Old 09-23-2007, 12:05 PM   #3
👏 Big Ron 👏
Member#: 18062
Join Date: Apr 2002
Chapter/Region: MAIC
Location: I can save you a ton of cash
on car parts so PM
me b4 j00 buy


Ill take a look at thıs and maybe add ıt to my nınja spreadsheet when I can. Im ın an Istanbul ınternet cafe rıght now.
Unabomber is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Compression ratio calculating spreadsheet mattwalters Normally Aspirated Powertrain 5 10-13-2012 01:30 PM
Meth ratio calculations. (washer fluid to HEET ratio etc.) DuckStu Water/Methanol Injection, Nitrous & Intercooler Cooling 18 06-10-2010 01:43 PM
Manual Trans 4.11 gear ratio sleepysubie RMIC Private Classifieds 0 06-03-2010 10:26 PM
Need gear ratio / speed calculator t_c General Community 3 03-16-2009 03:23 AM
Meth ratio calculations. (washer fluid to HEET ratio etc.) DuckStu Water/Methanol Injection, Nitrous & Intercooler Cooling 2 03-01-2008 07:31 PM

All times are GMT -4. The time now is 09:36 AM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.