HOME MAGAZINE FORUM RULES SPONSORS CONTACT
     
   
   
 
Go Back   CLASS RACER FORUM > Class Racer Forums > Stock and Super Stock Tech

Reply
 
Thread Tools Display Modes
Old 04-17-2017, 07:49 PM   #1
joespanova
Member
 
Join Date: Jun 2011
Location: Mc Donough Ga.
Posts: 431
Default Ladder bar tuning / adjusting

From your experiences , did moving the bars up or down , make the car more wheelstand prone?
joespanova is offline   Reply With Quote
Old 04-18-2017, 08:25 AM   #2
Hacksaw
Member
 
Join Date: Sep 2016
Posts: 204
Default Re: Ladder bar tuning / adjusting

Moving the front of the ladder bar up will raise the instant center and will be prone to wheelstands.
Hacksaw is offline   Reply With Quote
Old 04-18-2017, 03:30 PM   #3
joespanova
Member
 
Join Date: Jun 2011
Location: Mc Donough Ga.
Posts: 431
Default Re: Ladder bar tuning / adjusting

Quote:
Originally Posted by Hacksaw View Post
Moving the front of the ladder bar up will raise the instant center and will be prone to wheelstands.
For some reason I always though it was the other way around..........damn it ,I'm still dumb
joespanova is offline   Reply With Quote
Old 04-18-2017, 03:37 PM   #4
joespanova
Member
 
Join Date: Jun 2011
Location: Mc Donough Ga.
Posts: 431
Default Re: Ladder bar tuning / adjusting

Also..........I don't think I can get the pinion angle I want after I move the bars up..........extending the adjuster on the bottom bar is probably going to not allow me to get the bolts back in the housing bracket on the rear end.
In case someone would ask , the usual 2-3 degrees down is what I'm after......
In fact a well known chassis shop suggested just increasing the pinion angle would make the car more wheel stand prone?
Not sure why that would change anything.
Between bars up , pinion angle down , shock tuning...........damn.
The car leaves flat now...........I'm looking for more drama...LOL

Last edited by joespanova; 04-18-2017 at 03:41 PM.
joespanova is offline   Reply With Quote
Old 04-18-2017, 05:53 PM   #5
James L Miller
Member
 
Join Date: Apr 2005
Posts: 427
Default Re: Ladder bar tuning / adjusting

Quote:
Originally Posted by joespanova View Post
For some reason I always though it was the other way around..........damn it ,I'm still dumb
My thought is the ladder bar rotates up due to axle torque and is pushed forward by the driving force of the tires. Moving the pivot up wouldn't affect the upward force on the chassis, but moving the pivot point down would be pushing further away from the center of gravity. I would think that would cause the nose of the car to go higher.

If you disagree, please explain your logic.
__________________
Mopar 2 Ya!
James L Miller is offline   Reply With Quote
Old 04-18-2017, 06:12 PM   #6
joespanova
Member
 
Join Date: Jun 2011
Location: Mc Donough Ga.
Posts: 431
Default Re: Ladder bar tuning / adjusting

Quote:
Originally Posted by James L Miller View Post
My thought is the ladder bar rotates up due to axle torque and is pushed forward by the driving force of the tires. Moving the pivot up wouldn't affect the upward force on the chassis, but moving the pivot point down would be pushing further away from the center of gravity. I would think that would cause the nose of the car to go higher.

If you disagree, please explain your logic.
Uh , yeah.......thats exactly what I thought also.
Some guys use the "refrigerator or box" logic..........so what you suggest coinsides with THAT explanation , anyway.....hell if I know........I guess trying and testing is the only validation.
joespanova is offline   Reply With Quote
Old 04-19-2017, 06:40 AM   #7
nhramnl
Member
 
Join Date: Feb 2010
Posts: 153
Default Re: Ladder bar tuning / adjusting

I haven't owned a ladder bar car in a number of years, but I think I remember that the overall length of the bar has a significant effect on "hit" versus "wheelstand". Short bars smack the tire very hard, whereas longer bars tend to make the car wheelstand more. The principle still makes sense to me, because a longer bar essentially moves the intersect point forward, which would apply more rotational leverage to the chassis. I think...
nhramnl is offline   Reply With Quote
Old 04-19-2017, 06:59 AM   #8
SGSST109E
Member
 
Join Date: Jun 2007
Location: NJ
Posts: 137
Default Re: Ladder bar tuning / adjusting

Move the bar up for a harder hit. I have run my car that way for 20 years. Adjust your front shocks to control wheel stands. If the car isn't pulling the wheel up loosen the front shocks.
SGSST109E is offline   Reply With Quote
Old 04-19-2017, 08:21 AM   #9
FLEMING
Member
 
Join Date: Aug 2003
Posts: 182
Default Re: Ladder bar tuning / adjusting


Last edited by FLEMING; 04-19-2017 at 01:11 PM.
FLEMING is offline   Reply With Quote
Old 04-19-2017, 08:31 AM   #10
Hacksaw
Member
 
Join Date: Sep 2016
Posts: 204
Default Re: Ladder bar tuning / adjusting

Joespanova: You may want to modify the lower rear section of your ladder bar to make it adjustable. Lower adjuster link. This will give you the added length you require.
Hacksaw 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

Forum Jump


All times are GMT -5. The time now is 06:54 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Class Racer.com. All Rights Reserved. Designated trademarks and brands are the property of their respective owners.Ad Management plugin by RedTyger