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Old 10-23-2014, 12:40 PM   #1
HandOverFist
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Default Re: Fox and SN95 Mustang rear control arms

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Originally Posted by 7423 View Post
Probably not a good idea. Visions of a very narrow minded tech inspector in a bad mood signing your card in red ink instead of black. The rulebook does use the term non adjustable. The jury is out on the factory sway. Not real sure if it is of any value. I have always used the factory bar and have no experience without one.
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.
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Old 10-23-2014, 01:33 PM   #2
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Default Re: Fox and SN95 Mustang rear control arms

I have UPR upper and lower on my car. None are adjustable.
Eibach drag springs, no sway bar.
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Old 10-23-2014, 01:35 PM   #3
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Default Re: Fox and SN95 Mustang rear control arms

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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?
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Old 10-23-2014, 01:52 PM   #4
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Default Re: Fox and SN95 Mustang rear control arms

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Originally Posted by HandOverFist View Post
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...
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Old 10-23-2014, 02:01 PM   #5
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Default 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 ...
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Old 10-23-2014, 02:48 PM   #6
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Default 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...
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Old 10-23-2014, 03:39 PM   #7
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Default Re: Fox and SN95 Mustang rear control arms

Quote:
Originally Posted by ALMACK View Post
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.
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Old 10-23-2014, 05:29 PM   #8
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Default Re: Fox and SN95 Mustang rear control arms

Quote:
Originally Posted by HandOverFist View Post
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.
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