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-   -   Fox and SN95 Mustang rear control arms (https://classracer.com/classforum/showthread.php?t=55389)

HandOverFist 10-23-2014 01:35 PM
Re: Fox and SN95 Mustang rear control arms
 
Quote:
Originally Posted by Chris1529 (Post 450670)
I have UPR upper and lower on my car. None are adjustable.
Eibach drag springs, no sway bar.
What size slick you running Chris? Got a side pic of the car?

Dave Gantz 10-23-2014 01:52 PM
Re: Fox and SN95 Mustang rear control arms
 
Quote:
Originally Posted by HandOverFist (Post 450665)
How about a set of adjustable lowers once set then welded up solid? No longer adjustable, right? I'm always digging... ;) I've noticed that most of the aftermarket lowers are still using poly bushings instead of solids.
I think the idea is, that they don't want you messing with the wheelbase. If all 4 are adjustable, how does the tech guy know what you've done? He could measure the wheelbase, yes, but you may have moved the front wheels to compensate for the rear change.
I'll bet no one ever moved their wheelbase around...

ALMACK 10-23-2014 02:01 PM
Re: Fox and SN95 Mustang rear control arms
 
Here is a copy-n-paste from the 2014 NHRA rulebook:


SUSPENSION, Rear
Must remain as produced, except for the following: Leaves may be
changed (added or subtracted) as long as overall length and
mounting points are used. Coils may be changed (clamped or
spaced) as long as stock mounting points are maintained. Solid
bushings in rear suspension permitted. Cars with rear coil springs
may relocate the upper control arm at rear-end attachment point.
Rear trailing arms may be replaced with NHRA-accepted OEM-type
aftermarket units. Aftermarket lower unit must be non-adjustable
and have bushed ends (no heims). Aftermarket upper unit may be
adjustable and use heim ends instead of bushings. Sway bar(s)
optional. OEM or aftermarket torque arm permitted only on vehicles
OEM-equipped with a torque arm. OEM torque-arm attachment
points at rear end must be retained. See General Regulations 3:4.



As Charlie stated above, if a racer showed up with lowers that have an adjustable spring height , a tech guy might take it all wrong and ...

HandOverFist 10-23-2014 02:48 PM
Re: Fox and SN95 Mustang rear control arms
 
My guess is then any lower control arm with solid bushings will do...the cheaper the better. On the hunt for the cheaper now...

west coast 10-23-2014 03:23 PM
Re: Fox and SN95 Mustang rear control arms
 
Here is my take on this subject. For rear suspension double adjustable uppers everybody makes them, both upper and lower needs to have spherical in all joints, this will make your rear suspension very free when this happens you will need to do some thing like a sway bar or others use air bags to help this. Finding lower arms with spherical bearing in both ends is rare I think BMR makes some.

HandOverFist 10-23-2014 03:27 PM
Re: Fox and SN95 Mustang rear control arms
 
Quote:
Originally Posted by west coast (Post 450693)
Here is my take on this subject. For rear suspension double adjustable uppers everybody makes them, both upper and lower needs to have spherical in all joints, this will make your rear suspension very free when this happens you will need to do some thing like a sway bar or others use air bags to help this. Finding lower arms with spherical bearing in both ends is rare I think BMR makes some.
Pricey, but very nice... http://www.cjponyparts.com/bmr-rear-...-1998/p/LCA39/

HandOverFist 10-23-2014 03:39 PM
Re: Fox and SN95 Mustang rear control arms
 
Quote:
Originally Posted by ALMACK (Post 450677)
Here is a copy-n-paste from the 2014 NHRA rulebook:


SUSPENSION, Rear
Must remain as produced, except for the following: Leaves may be
changed (added or subtracted) as long as overall length and
mounting points are used. Coils may be changed (clamped or
spaced) as long as stock mounting points are maintained. Solid
bushings in rear suspension permitted. Cars with rear coil springs
may relocate the upper control arm at rear-end attachment point.
Rear trailing arms may be replaced with NHRA-accepted OEM-type
aftermarket units. Aftermarket lower unit must be non-adjustable
and have bushed ends (no heims). Aftermarket upper unit may be
adjustable and use heim ends instead of bushings. Sway bar(s)
optional. OEM or aftermarket torque arm permitted only on vehicles
OEM-equipped with a torque arm. OEM torque-arm attachment
points at rear end must be retained. See General Regulations 3:4.



As Charlie stated above, if a racer showed up with lowers that have an adjustable spring height , a tech guy might take it all wrong and ...
Are the old Southside Machine bars considered legal? I don't see where any of these suspension parts are NHRA accepted in writing.

ALMACK 10-23-2014 05:29 PM
Re: Fox and SN95 Mustang rear control arms
 
Quote:
Originally Posted by HandOverFist (Post 450697)
Are the old Southside Machine bars considered legal? I don't see where any of these suspension parts are NHRA accepted in writing.
I see no reason why they would not be legal.
Those arms are not adjustable.

7423 10-23-2014 09:28 PM
Re: Fox and SN95 Mustang rear control arms
 
Quote:
Originally Posted by west coast (Post 450693)
Here is my take on this subject. For rear suspension double adjustable uppers everybody makes them, both upper and lower needs to have spherical in all joints, this will make your rear suspension very free when this happens you will need to do some thing like a sway bar or others use air bags to help this. Finding lower arms with spherical bearing in both ends is rare I think BMR makes some.
I would love to spherical bearing on the lowers, but once again, if you get a tech guy with a stiffy, you will wish you had bushings and a grease gun.

Mark Yacavone 10-23-2014 10:50 PM
Re: Fox and SN95 Mustang rear control arms
 
Quote:
Originally Posted by 7423 (Post 450738)
I would love to spherical bearing on the lowers, but once again, if you get a tech guy with a stiffy, you will wish you had bushings and a grease gun.
A couple of rings of soft rubber on the outside and ..ah never mind...I didn't say it.


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