Drag Racing Tech
Sponsored by:
Sponsored by:

Auto Gear Calculator

Thread Tools
 
Search this Thread
 
Old Jan 14, 2008 | 12:55 PM
  #1  
LIL SS's Avatar
Thread Starter
Moderator
iTrader: (9)
 
Joined: Nov 2001
Posts: 2,966
Likes: 2
From: San Jose area
Default Auto Gear Calculator

Not sure if anyone here will use this. But I stumbled a site that showed all the different gear ratios for the several transmisions. I threw it in an excel sheet and wrote some equations. Basically if you put in your Gear, Tire, Converter loss and RPM it will give you mph for both a locked and unlocked converter. Might be helpful to figure out what you need.

http://73-ls1.com/misc/gearing_revision_2.xls

If you have a tranny you would like me to add, post the gear specs and I'll add it.

Added RPM vs MPH in 100 rpm increments. Put your info in the first page labeled "Top Speed"

Last edited by LIL SS; Jan 16, 2008 at 02:15 AM.
Reply
Old Jan 14, 2008 | 01:07 PM
  #2  
rufretic's Avatar
10 Second Club
iTrader: (37)
 
Joined: Jan 2004
Posts: 1,935
Likes: 0
Default

Very nice. Thanks.
Reply
Old Jan 14, 2008 | 03:22 PM
  #3  
Tireburnin's Avatar
TECH Fanatic
20 Year Member
iTrader: (42)
 
Joined: Oct 2004
Posts: 1,005
Likes: 2
From: San Diego, CA
Default

That's helpful. Thanks
Reply
Old Jan 15, 2008 | 08:46 AM
  #4  
1SlowFormula's Avatar
11 Second Club
20 Year Member
 
Joined: Jul 2005
Posts: 1,089
Likes: 3
From: West Linn, Oregon
Default

looks good, but you are only showing whatever RPM they insert...

good work, I can see a lot of people using it for converter loss calculations and gearing choice, I will add it to my favorites to help those who are asking about it...
Reply
Old Jan 15, 2008 | 04:07 PM
  #5  
LIL SS's Avatar
Thread Starter
Moderator
iTrader: (9)
 
Joined: Nov 2001
Posts: 2,966
Likes: 2
From: San Jose area
Default

1slow, I'm assuming you did not read this part "When I get some time, I'll probably make a second page basing it against rpm in 100rpm steps."

I started to look in to that before I posted what I did up. It's going to take some time to do each tranny.
Reply
Old Jan 15, 2008 | 05:15 PM
  #6  
bad2000z's Avatar
11 Second Club
iTrader: (4)
 
Joined: Jun 2006
Posts: 1,125
Likes: 0
From: Vestal NY
Default

Cool, thanks!
Reply
Old Jan 15, 2008 | 06:30 PM
  #7  
1SlowFormula's Avatar
11 Second Club
20 Year Member
 
Joined: Jul 2005
Posts: 1,089
Likes: 3
From: West Linn, Oregon
Default

Originally Posted by LIL SS
1slow, I'm assuming you did not read this part "When I get some time, I'll probably make a second page basing it against rpm in 100rpm steps."

I started to look in to that before I posted what I did up. It's going to take some time to do each tranny.
yeah it doesn't suprise me that I missed that, sorry...
Reply
Old Jan 16, 2008 | 02:16 AM
  #8  
LIL SS's Avatar
Thread Starter
Moderator
iTrader: (9)
 
Joined: Nov 2001
Posts: 2,966
Likes: 2
From: San Jose area
Default

Updated with stepped RPM's..
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-1

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-2

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-3

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-4

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-5

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-6

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-7

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-8

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-9

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
Old May 5, 2008 | 04:23 PM
  #9  
GFORCE1320's Avatar
9 Second Club
iTrader: (15)
 
Joined: Sep 2005
Posts: 361
Likes: 1
From: Wichita, KS
Default

This thing is dead on the $, I ran a 9.82 @ 139 yesterday with a th400 & 3.46 gear, 26" tall tires. I went through the lights @ 7200 rpms.
Reply
Old Feb 21, 2009 | 10:08 PM
  #10  
djsanchez2's Avatar
TECH Addict
iTrader: (14)
 
Joined: May 2005
Posts: 2,727
Likes: 0
From: Simi Valley, CA.
Default

How do you calculate convertor slip? Is it built in?
Reply




All times are GMT -5. The time now is 02:51 PM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-5
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-6
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-7
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-8
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-9
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE