Info inside on stock rims & brake weight vs Centerline rims & Aerospace 12" brakes

[GNVYUS 1]

Here is some weight info from my 87 GN and the Aerospace 12 inch billet brake kit and Centerline rim upgrade I have done. Drum info is also included for those who are looking to shed even more weight.

Stock rims (with cap): 29 lbs
Center line auto drags 15x10: 19 lbs
Center line auto drags 15x8: 17 lbs
Stock brake drum: 10 lbs
Aluminum brake drum: 5 lbs
Stock rotor: 17 1/2 lbs
Aerospace 12 inch billet rotor and hub: 9 1/2lbs
Stock caliper: 6 3/4 lbs
Aerospace 4 piston billet caliper: 3 1/4 lbs

TOTALS

Stock rims = 116 lbs
Centerline rims = 72 lbs (save 42lbs)

Stock drums = 20 lbs
Aluminum drums = 10 lbs (save 10lbs)

Stock rotors = 35 lbs
Aerospace rotors = 19 lbs (save 16lbs)

Stock calipers = 13 1/2 lbs
Aerospace calipers = 6 1/2 lbs (save 7lbs)

Total weight savings = 75lbs!!!!
68lbs of it is rotating mass!!!!

http://www.aerospacecomponents.com/page7a.htm#p7a
I have photos of the aerospace brake install process
email me at

gnvyus1@hotmail.com

Hope this helps

 

[galoush]

Now these can be used with stock upper and lower arms ? also ive got the stock vacume brake system from and 85 on my car , would the master cyl need to be changed . This may be my next upgrade.

 

[GNVYUS 1]

Yep, I still have the stock control arms and spindle. The spindle needed to get the caliper ear sawsawed off, part of the spindle nearest the bumper sawsawed off, a 5 minute drumel to level off a spot for the caliper bracket, and 3 taps of the exsisting dust shield holes for the caliper bracket.

It might sound involved, but its really not. I am by no means a very skilled craftsman, but I sure do like the sawsaw now.
Sawsaw took about 5 minutes tops and the drumel the same. I was more afraid of screwing up the taps than anything else.

I am going to vacuum brakes on my 87 soon. The 1 1/8th master cylinder is plenty and has done just fine. No proportioning valve on this set up.

I have this same kit on my 69 GTO. That was even easier to install and man did that make a difference. I feel much safer in both cars now.

I have pics

 

[galoush]

Hey Dr. if you could send the pics id like to checkem out . Thanks Galoush@hotmail.com

 

[lazaris]

I would to see the pics too. Thanks

 

[jsta6]

I would like pics also.

I thought you were originally using the 10 3/4" rotor?

I thought you couldn't use 12" rotors with the stock a-arms?

I have four kids, and two are twins (9 mos), so I need something I can quickly and easily install myself. I don't want to mess with the 1LE or b-body a-arms and spindles if I don't have to.

 

[TRFanatic]

pics

I would appreciate some pictures as well. You bought the front or rears rotors? Cost??

Thanks alot

Ravi

 

[GNVYUS 1]

Shoot me an email guys and I will gladly send you the 6 or 7 pics I have of the set up. gnvyus1@hotmail.com
I will probably do a page soon as I am getting my ride back next month.

I originally had 11 3/4 inch rotors but the kit uses a 1/2 spacer. So, my 265/50's were sticking out to much and I had to buy a new rim with a 5 inch backspacing. Then, the darn caliper barely hit the inside of the rim because of the larger backspacing so I had to send it back for the 10 3/4 rotors. The 11 3/4's looked great in there and would of helped on those frantic highway stops a few more feet.

The 11 3/4 kit did fit with the 15x8 (4" bs) and my photo shows it. But my greed for more traction and handling killed that kit from staying on my car.

 

[jsta6]

OK, so,

The confusion lies within the title of the thread, "12" brakes".

You are now using 10 3/4" rotors, correct?

With the 10 3/4" rotors and four piston billet calipers from Aerospace, you just bolt them on and go, right?

No need for swapping out the a-arms and spindles?

Please advise-

 

[GNVYUS 1]

Aerospace calls their kits 12" or 11", but really the rotors are 1/4 smaller than whatever size they are talking about.

My original kit (all the photos) are of the 12" (or really a 11 3/4) but I had to change to the 11" kit (or really the 10 3/4)kit. Ya I know, the numbers game.

They just bolt on with no new arms or spindles. They do use a spacer, and that might be a problem for someone with larger rim/tire combos or track guys. Some tracks might not like a spacer on the front tires.

 

[jsta6]

Thanks.

I sent you an email for some pics.

I would like to see this "spacer". My wheels stick out a bit much already...