Hot Rod Forum : Hotrodders Bulletin Board - Reply to Topic
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> Suspension - Brakes - Steering> 5" square tube frame rails
User Name
Password
lost password?   |   register now

Thread: 5" square tube frame rails Reply to Thread
Title:
  
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :

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:
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.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
01-13-2012 11:25 PM
belchfire
frame

I was comparing a '76 1/2 ton ford frame which is under it now and it is 5x3x.187 channel. There was a possibility of a > '97 dakota frame and that is 6x3 rect (I think). Didn't the 427 cobra use 4" dia x .090 tube? I don't plan to do any heavy hauling with it and I think that's why the truck frames are over built. If I were to buy new steel, I was leaning towards 5x3x .187.
5x3x.187 comes in @ 9.68 lbs/ft and 5x5x.125 is 8.27 lbs/ft. Seems that I could have a larger cross section and greater torsional rigidity and lighter weight. Since the sub frames are complete units, I don't think that there will be a lot of concentrated dynamic stress points where the wall thickness will be an issue.
Point is that steel ain't cheap and I already have it.
01-13-2012 01:46 PM
matts37chev
Quote:
Originally Posted by nine4gmc
i am body dropping a yukon and it is common to use 3"x5", 3/16" box for the rails, this is a large heavy suv though and requires the thicker wall. i would think your 3x5 1/8" could work but lets hear from some car experts.
I think he is planning on using 5x5 1/8"
I think it will work ok, but I think what you are using( 3x5 3/16") would be better
01-13-2012 01:41 PM
matts37chev when you say 2x3 tube seems flimsy, think about what that stock ford parts donor frame is made from
01-13-2012 01:39 PM
nine4gmc i am body dropping a yukon and it is common to use 3"x5", 3/16" box for the rails, this is a large heavy suv though and requires the thicker wall. i would think your 3x5 1/8" could work but lets hear from some car experts.
01-13-2012 01:32 PM
belchfire
5" square tube frame rails

My '53 Studebaker pick up has seen a lot of different drive trains and chassis over the last 40 years. I will now embark on the last and best chassis that I hope to build. I have a '97 T-bird IRS and will get a '03-'07 crown vic front susp. I'll be running a Ford 300" six with an AOD 4 speed auto. With 12" &10" discs, rack &pinion and all 4 wheels independent, the handling should be spectacular. The problem, of course, is that I will be using a ladder frame. I've seen a lot of frame articals and they look rather flimsy. 2x3 tube may be OK for a weekend roadster, but mine will be a daily driver and will compete with today's machines. I'm thinking of using 5" square tube .125 wall. Mainly because I already have some. With some well placed crossmembers it should have good torsional stiffness. Being only .125 wall, I calculate that it should weigh around 350#. I don't know how that compares in the frame world, but it didn't seem that heavy to me.
Just looking for some feedback and if there is some glaring no-no that I may be missing.

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


All times are GMT -6. The time now is 01:13 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.