'83 for 50 MPG, big brakes,and more
#28
Full Member
Thread Starter
Join Date: Oct 2014
Location: Smithfield, UT
Posts: 207
Likes: 0
Received 0 Likes
on
0 Posts
It was easier to figure out an affordable and easy brake upgrade for the '83 front end than for my FC subframe swap. I know that some 12" brakes can fit in some 15" wheels, and since I'm now forced into using the 4-lug 15" wheels, 12" is what I'm working on. Sure, I was going to go 11" before, but now finding a wrecked FC with the optional 11" 4-piston 5-lug fronts isn't realistic.
#29
Full Member
Thread Starter
Join Date: Oct 2014
Location: Smithfield, UT
Posts: 207
Likes: 0
Received 0 Likes
on
0 Posts
Between sanding Bondo, spraying primer, and dying the interior parts, I've been studying Napaonline.
If I want to use Mazda calipers, the NB4886041 is 11.88" x 0.87", and $ 42 ea. But I think I want more. I think the next step, playing it safe, is NB4886777, which is just 11.7", but is 1.03" thick, for using the Camaro calipers I have. That's $ 46 per rotor. Either of those are likely to require having their center holes enlarged. And they're both 5 on 4.5, so I'd have to drill 3 new holes in each to make them 4-lug. That's not difficult.
If the 11.7s prove an easy fit, there are NB48880014, also 1.03", but 12.02" and $ 53 ea. Or if I want Mazda calipers and 4-lug without drilling, UP880192 is 12.01" x 0.87" for $ 49 ea.
But then we come to the other spec of cast rotors. The height. Napa gives these specs also, but if you have to make caliper brackets anyway, all that matters is if the height is too shallow for your calipers and your wheels.
If I like what I end up with, I'll offer copies of my brackets.
If I just wanted the biggest cheapest rotors, I found some 12.72" x 1.18" for $ 36 ea. Dunno what low-cost calipers they'd like.
Anyway, that's where my mind is while I'm nearing the deadline for Maaco.
If I want to use Mazda calipers, the NB4886041 is 11.88" x 0.87", and $ 42 ea. But I think I want more. I think the next step, playing it safe, is NB4886777, which is just 11.7", but is 1.03" thick, for using the Camaro calipers I have. That's $ 46 per rotor. Either of those are likely to require having their center holes enlarged. And they're both 5 on 4.5, so I'd have to drill 3 new holes in each to make them 4-lug. That's not difficult.
If the 11.7s prove an easy fit, there are NB48880014, also 1.03", but 12.02" and $ 53 ea. Or if I want Mazda calipers and 4-lug without drilling, UP880192 is 12.01" x 0.87" for $ 49 ea.
But then we come to the other spec of cast rotors. The height. Napa gives these specs also, but if you have to make caliper brackets anyway, all that matters is if the height is too shallow for your calipers and your wheels.
If I like what I end up with, I'll offer copies of my brackets.
If I just wanted the biggest cheapest rotors, I found some 12.72" x 1.18" for $ 36 ea. Dunno what low-cost calipers they'd like.
Anyway, that's where my mind is while I'm nearing the deadline for Maaco.
#32
Full Member
Thread Starter
Join Date: Oct 2014
Location: Smithfield, UT
Posts: 207
Likes: 0
Received 0 Likes
on
0 Posts
The wheels and muffler are scrap, there's no paint on the dash, the dash is out of the car, and the steering wheel is masked. The side of the metal underdash bracing gets hidden by the dash endcaps, and everything I sprayed will get oversprayed at Maaco anyway. So wait until you see the outcome before posting what can look like unwarranted criticism.
#33
Junior Member
Join Date: Oct 2014
Location: Hot places
Posts: 13
Likes: 0
Received 0 Likes
on
0 Posts
The wheels and muffler are scrap, there's no paint on the dash, the dash is out of the car, and the steering wheel is masked. The side of the metal underdash bracing gets hidden by the dash endcaps, and everything I sprayed will get oversprayed at Maaco anyway. So wait until you see the outcome before posting what can look like unwarranted criticism.
#37
Full Member
Thread Starter
Join Date: Oct 2014
Location: Smithfield, UT
Posts: 207
Likes: 0
Received 0 Likes
on
0 Posts
#38
Full Member
Thread Starter
Join Date: Oct 2014
Location: Smithfield, UT
Posts: 207
Likes: 0
Received 0 Likes
on
0 Posts
#41
Full Member
Thread Starter
Join Date: Oct 2014
Location: Smithfield, UT
Posts: 207
Likes: 0
Received 0 Likes
on
0 Posts
I'm suffering an injury, the junction of my left shoulder and neck. Surprisingly bad, even hurts to stand from a backless chair. Anyway, I'll be back when I can, with that paint code.
#43
Full Member
Thread Starter
Join Date: Oct 2014
Location: Smithfield, UT
Posts: 207
Likes: 0
Received 0 Likes
on
0 Posts
I put a 0.045" cutting disc on my angle grinder, and started correcting the FC crossmember. In no particular order, here are the pics so far. BTW, if you copy this, you need to establish a baseline, do plenty of careful measuring and figuring, and keep track of your reference points. I'll give my exact measurements once my results are acceptable. If you do copy me, it is at your own risk, et cetera.
#50
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,780
Received 2,565 Likes
on
1,824 Posts
i like! raising the inner A arm pivot in the chassis is good.