Detecting stall speed? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 02-04-2008, 03:15 PM
Marcel
 

Last journal entry: Choo-choo town
Last photo:
Join Date: Feb 2002
Location: adairsville ga.
Age: 71
Posts: 413
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Detecting stall speed?

Is there anyway to find what the stall speed of a converter is without removing it? thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-04-2008, 03:24 PM
NEW INTERIORS's Avatar
Believe in yourself !!!!!!
 

Last journal entry: 41 WILLYS FRAME
Last photo:
Join Date: Jul 2007
Location: In My Shop..
Age: 49
Posts: 10,104
Wiki Edits: 0

Thanks: 1,253
Thanked 552 Times in 409 Posts
You can hold your foot on the brake in rev it up till it start's to pull,This will give you a idea were it's at.If you have a tach.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-09-2008, 12:48 AM
Member
 
Last wiki edit: Vacuum brake bleeder set up
Join Date: Nov 2003
Location: So Cal
Posts: 1,245
Wiki Edits: 8

Thanks: 0
Thanked 0 Times in 0 Posts
Set up a data acquisition system to log RPM and look at the slope of the graph

Look at the blue line. This one stalled at about 4000rpm after staging at about 3000rpm.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-11-2008, 03:32 AM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,153
Wiki Edits: 0

Thanks: 5
Thanked 380 Times in 374 Posts
You need a tach and a safe stretch of open road to make a simple driving test.

With most street tires the tires will spin before you reach the torque converters maximum stall by either stationary "power braking" the car or launching at full throttle.

With racing slicks that "hook up" well, you can just watch the tach as you launch the car at full throttle from a stop.

The best way to get a good idea of the actual stall speed in the car using street tires is to slowly/smoothly accelerate in first gear using minimal throttle. Shift to drive and let the trans shift to a higher gear (3rd is best).
When the transmission shifts to the higher gear, floor the throttle and jamb on the brakes hard with both feet and watch the tach. It (the tach) will flash to your converter stall speed briefly before the transmission either down shifts and or the tires spin.

On a 350ci motor a stock GM th 350 12" converter will stall at 2100-2200 rpm
A typical 11" diameter "high stall" converter will stall at 2800 to 3000rpm.
A typical 10" diameter "street/strip" converter will stall around 3200 to 3600 rpm.
A smaller ci motor will show a lower stall speed (less engine torque). A larger ci motor will show a higher stall. Usually a 454 BB will show about 500rpm higher stall than a 350 with the same converter.
"Race" 8" and 9" converters can vary a lot in the actual stall depending on their specific internal construction.

Last edited by F-BIRD'88; 02-11-2008 at 03:44 AM.
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
stall speed speed_demon666 Engine 2 11-16-2007 07:21 AM
Torque Converter Stall Speed leejoy Transmission - Rearend 2 09-17-2006 10:43 AM
Stock C6 stall speed? Steve-0321 Transmission - Rearend 0 01-30-2004 11:20 AM
Stall Speed trees Transmission - Rearend 6 04-13-2003 06:59 PM
do I need to install a stall speed? the ernster Transmission - Rearend 2 04-13-2003 08:59 AM


All times are GMT -6. The time now is 11:10 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.