Chromoloy Adjustable rear control arms front and rear

[arizonazcar]

arizonazcar.com has been making Chromoloy Adjustable control arms for the Z for almost 20 years , they're 100% tig welded and jig built to blueprint specs. They are a complete bolt on. The fronts feature adjustable caster and track, the rears feature on the car adjustable toe as well as track adjustment.

Please see

http://www.arizonazcar.com/lowarms.html

 

Dave

[jgkurz]

the rears feature on the car adjustable toe as well as track adjustment.

 

Dave, Can you explain what track adjustment is as it relates to your control arms?

 

Also, other than many years of road experience, have your arms undergone any type stress testing? In your experience how have they held up on track cars? There has been some previous discussion on this board about how chromoly arms hold up to repeated track time.

 

Thanks much for your input.

[arizonazcar]

The center rod end on the rear arm is threaded into an adjuster that can be turned to set toe (on the car),

the rearward rod end can be screwed in and out to adjust track.

On the front A-arm the ball joint can be screwed in and out to set track and the T/C rod (hex aluminum) is threaded RH/LH to adjust caster on the car.

 

Unfortunately I had the expierience of crash testing a set of them into a concrete barrier on the roadcourse at 60+ MPH without failure (bent every last piece of the car including the driver). The oldest arms we made are now about 18 years old, longevity isnt an issue.

Stress analysis would be fine if you could duplicate the infinite variety of conditions they could be exposed to.......even if they were made of billet titamium they're still bolted to a 30 year old uni-body car. All critical parts on any race car need to be regularly inspected for damage / corrsion / fatigue etc. Chromoly tubing holds up fine but I have seen many home-made parts poorly (amateur) constucted that I wouldn't drive to the grocery store with ..... you get what you pay for.

I have a professional master fabricator (artist) that does the actual production...the tubing is cut and coped to bluprint specs and then 100%

tig welded in a jig.....the adjuster is made on a CNC lathe, the finished arms are gold zinc plated for corrosion resistance. The rod ends I use are either heat treated chromoly or 3pc. precision with teflon, the bolts are all grade 8.

Please take a look at the other quality parts we do at http://www.arizonazcar.com

 

Dave

[preith]

I bought Dave's control arms (both front and rear) a few years ago, and am very pleased with them. As he said, the rears are "on the car" adjustable.

 

IMHO, the rears are still the best design that I've seen. It seems most people think of his older designs when they hear about them, but the newer ones are much better.

 

I was not bribed to write this, but hey Dave, how about a discount on my next purchase.

 

Phil

[jgkurz]

Thanks for the thorough response Dave. I'm saving my pennies!

 

Just curious, for a street car do the chromoly arms add significant road noise and ride harshness? I know they are meant for the serious competition car, but most of us drive our car on the street part of the time.

 

Thanks again.

[arizonazcar]

Surprisingly very little additional harshness is added, however I didn't intend them for gravel roads either.

Dave