Suspension TECH Including Brakes, Wheels and tires

          
Reply
 
Thread Tools Display Modes
  #1  
Old 07-14-2026, 05:29 PM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Katy,TX USA
Posts: 21,706
Default Borgeson PS boxes -stops

Since F body and A body boxes have different internal stops how do the Borgeson boxes get by without them?

__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
  #2  
Old 07-14-2026, 05:53 PM
JLMounce JLMounce is offline
Ultimate Warrior
 
Join Date: Sep 2005
Location: Greeley, Colorado
Posts: 4,540
Send a message via AIM to JLMounce
Default

Later first gen F-bodies relied on a positive stop from the steering arm that would contact the lower control arm. I believe all A-bodies had that same design where the stop was built into the steering arms.

I have a box without an internal stop and also don't have steering arms with a positive stop on them. It's never been an issue for me. You can tell pretty easily when the tire contacts the frame. If you're traveling at any real rate of speed and find yourself in that situation, something has gone terribly wrong and a tire contacting a flat frame would be the least of your worries.

__________________
-Jason
1969 Pontiac Firebird
  #3  
Old 07-14-2026, 06:16 PM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Katy,TX USA
Posts: 21,706
Default

I had just heard the F body with internal stops on an A body really shortens turning radius. Fat tires hitting sway bar also limits it on F bodies

__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
  #4  
Old 07-14-2026, 07:43 PM
RocktimusPryme's Avatar
RocktimusPryme RocktimusPryme is offline
Ultimate Warrior
 
Join Date: Jul 2014
Location: Bedford, IN
Posts: 2,590
Default

Quote:
Originally Posted by Skip Fix View Post
I had just heard the F body with internal stops on an A body really shortens turning radius. Fat tires hitting sway bar also limits it on F bodies
I think thats pretty much it. Though mine with 235s in front actually contacts the frame before any steering components. And mine is a 67 so it has stops on the control arms/spindles similar to an A body. I cant count the amount of times I'm actually at full stop on the wheel per year on one hand. I have a GTA box Ive been meaning to swap it, but you have to remove the header and Im lazy.

I havent checked this, but Im assuming the borgeson unit would have A body like radius.

With the Fbodies I think they continually got a narrower radius as tires got more aggresive. Cullminating with like the IROC cars that are down to like 64 degrees or something like that. Then again, an IROC definetely handles better than a 1970 Chevelle. So is the extra 5 degrees of turning radius really worth anything?

__________________
1967 Firebird 462 580hp/590ftlbs
1962 Pontiac Catalina Safari Swapped in Turd of an Olds 455
Owner/Creator Catfish Motorsports
https://www.youtube.com/@CatfishMotorsports
  #5  
Old 07-15-2026, 02:37 AM
Scarebird's Avatar
Scarebird Scarebird is offline
Ultimate Warrior
 
Join Date: Nov 2002
Location: Moita, Portugal
Posts: 5,386
Default

Quote:
Originally Posted by RocktimusPryme View Post
...So is the extra 5 degrees of turning radius really worth anything?
In short, yes.

In places here you need the tightest turning radius possible - even some of the parking lots demand it.

  #6  
Old 07-15-2026, 09:10 AM
vertigto's Avatar
vertigto vertigto is offline
Chief Ponti-yacker
 
Join Date: Dec 2005
Posts: 891
Default

I have the Borgeson 800130 on my 70 GTO and don't notice any issues.

__________________

1970 GTO (Granada Gold) - 400 / TH400
  #7  
Old 07-15-2026, 11:29 AM
RocktimusPryme's Avatar
RocktimusPryme RocktimusPryme is offline
Ultimate Warrior
 
Join Date: Jul 2014
Location: Bedford, IN
Posts: 2,590
Default

Quote:
Originally Posted by vertigto View Post
I have the Borgeson 800130 on my 70 GTO and don't notice any issues.

I would bet the aftermarket box is a carbon copy replacement for a ln a body/JGC box.

It’s 68-later f bodies that are meant to have internal stops that might have issues.


I almost caveats my previous statement to say “except for tight parking situations”. I can see how that would be a problem in Europe with roads designed around horses. I think people swap a 3rd gen box in their early 2nd gen and notice the difference because it’s a direct AB comparison. But if it was born that way I don’t know that you would notice.

Again has anyone gotten into a 1988 IROC and say “man I can’t park this thing!”

__________________
1967 Firebird 462 580hp/590ftlbs
1962 Pontiac Catalina Safari Swapped in Turd of an Olds 455
Owner/Creator Catfish Motorsports
https://www.youtube.com/@CatfishMotorsports
  #8  
Old 07-15-2026, 02:31 PM
JLMounce JLMounce is offline
Ultimate Warrior
 
Join Date: Sep 2005
Location: Greeley, Colorado
Posts: 4,540
Send a message via AIM to JLMounce
Default

Quote:
Originally Posted by RocktimusPryme View Post
I would bet the aftermarket box is a carbon copy replacement for a ln a body/JGC box.

It’s 68-later f bodies that are meant to have internal stops that might have issues.


I almost caveats my previous statement to say “except for tight parking situations”. I can see how that would be a problem in Europe with roads designed around horses. I think people swap a 3rd gen box in their early 2nd gen and notice the difference because it’s a direct AB comparison. But if it was born that way I don’t know that you would notice.

Again has anyone gotten into a 1988 IROC and say “man I can’t park this thing!”
Related but unrelated, my wife's C6 GS is horrendous in it's turn radius. My Firebird easily bests it in this regard. But again, the only time you actually notice it is in parking lots.

__________________
-Jason
1969 Pontiac Firebird
  #9  
Old 07-15-2026, 09:59 PM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
Ultimate Warrior
 
Join Date: Dec 1999
Location: Katy,TX USA
Posts: 21,706
Default

My 1985 Full sized Bronco could almost do a U turn in 2 lanes!

__________________
Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
  #10  
Old 07-15-2026, 10:59 PM
RocktimusPryme's Avatar
RocktimusPryme RocktimusPryme is offline
Ultimate Warrior
 
Join Date: Jul 2014
Location: Bedford, IN
Posts: 2,590
Default

Quote:
Originally Posted by JLMounce View Post
Related but unrelated, my wife's C6 GS is horrendous in it's turn radius. My Firebird easily bests it in this regard. But again, the only time you actually notice it is in parking lots.
I had one of the 2012 turbo Buick Regals, that were basically just rebadged Opels. Fun little car, cool to have a Buick with a 6 speed. I couldnt park that thing worth a damn. I always assumed it was just a factor of having a manual trans that you have to work the clutch at low speed. But now I wonder if that thing had a weak turning radius now that you say that.

__________________
1967 Firebird 462 580hp/590ftlbs
1962 Pontiac Catalina Safari Swapped in Turd of an Olds 455
Owner/Creator Catfish Motorsports
https://www.youtube.com/@CatfishMotorsports
Reply


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 -4. The time now is 10:52 AM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017