Driveshaft Critical Speed Charts? - Yellow Bullet Forums

Go Back   Yellow Bullet Forums > Technical Section > Rearends - Yukon Gear & Axle

Rearends - Yukon Gear & Axle

Reply
 
Thread Tools Display Modes
Old 02-24-2009, 11:23 PM   #1
b.guggenmos
Junior Member
Launchin
 
Join Date: Jun 2008
Location: Olympia, WA
Posts: 359
Default Driveshaft Critical Speed Charts?

I have looked at Mark williams, Strange and the Wallace Racing formulas and they all give different answers for driveshaft critical speed.
My questions are do you just measure tube length or u joint center to center?
Then do you pick a brand and follow there recommendation?
I am partial to Mark Williams but they are the most expensive and the most conservative on the critical speed chart.
Right now I have a 3 1/2" .083 mild steel at about 7500 rpm and 54" long center to center made by a local shop. I put a nice dent in it on my ladder bar cross member and need to replace the driveshaft. My ladder bar cross member has been relocated. Thanks, Brian
b.guggenmos is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-25-2009, 03:56 PM   #2
Scott @ DLS
Senior Member
Smoked another BBC
 
Scott @ DLS's Avatar
 
Join Date: Jul 2006
Location: 32639 Groesbeck HWY. Fraser MI. 48026
Posts: 1,109
Default Re: Driveshaft Critical Speed Charts?

I have always ran a Spicer non-twist tube in my car that is 3" dia and never had a problem with that mild steel going 8000 thru the traps. Mine is 44" long and 3" dia.

Found an OEM link for ya, http://www2.dana.com/expert/wc.dll?cvsp~Decrits~
Scott @ DLS is offline   Reply With Quote
Old 03-17-2009, 11:48 AM   #3
Supershafts
Senior Member
Smoked another BBC
 
Supershafts's Avatar
 
Join Date: Nov 2008
Location: Long Island, New York
Posts: 1,823
Default Re: Driveshaft Critical Speed Charts?

Many different ideas out there on shaft speed, i have always used the formula that spicer uses.
Alum shafts are higher.

Some shafts i make for nascar cars are in my opinion exceeeding the rpms of the shaft, but they don't break, so maybe im wrong...
Supershafts is offline   Reply With Quote
Reply

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



All times are GMT -4. The time now is 10:17 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
Resources saved on this page: MySQL 3.64%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Yellow Bullet LLC