Rear 4 lug disk brake swap questions.

ajb4507 · November 18th, 2008, 03:45 PM

Im planning on starting taking out the drum brakes and swapping in a set of disks i picked up for free when i bought my motor. I believe that the parts i have came from a cobra or turbo coupe not sure which. Any way i have heard that you need the axles that the calipers and brakes came with, is this ture? Also if anynone has done this before some pointers or tips would ve greatly apreciated.

grnstang · November 18th, 2008, 03:49 PM

yeah I hope someone knows about this cause i'm looking to do the same

Haggis13 · November 18th, 2008, 08:58 PM

It is not true if you buy a set of offset brackets for FOX length axles.

North Racecars Brake Solutions

ajb4507 · November 19th, 2008, 11:55 AM

so if couldnt i just build a 3/4 inch spacer to do the same thing?

ajb4507 · November 19th, 2008, 02:16 PM

also i have the rotors the calipers and the mounting bracket. Is there anything else that i am missing.

1BADSTANG · November 19th, 2008, 03:36 PM

i did the rear disk brake conversion from ssbc, its a shitty set up. If you are doing it for free i have no advice but id put the money down and get that sweet wilwood rear conversion

Haggis13 · November 19th, 2008, 06:56 PM

Originally Posted by ajb4507

also i have the rotors the calipers and the mounting bracket. Is there anything else that i am missing.

You'll need new e-brake cables, adapter to fit the rear line to the hoses on the calipers, and adjustable proportioning valve and the plug to defeat the stock valve. A larger master cylinder helps (94-95 GT is good and cheap) I don't see a spacer working, as the bend in the bracket happens up over the axle shafts on the bracket - but I could be wrong and have been before.

old gray fox · November 19th, 2008, 07:53 PM

you'll need 5 lug axles to run 17 in wheels to clear the calipers and you'll have to change your booster, are your rotors 11 in

Haggis13 · November 19th, 2008, 08:15 PM

Originally Posted by old gray fox

you'll need 5 lug axles to run 17 in wheels to clear the calipers and you'll have to change your booster, are your rotors 11 in

No he won't - He's doing a 4 lug conversion. You need 17" rims to clear 13" cobra brakes.

3521 · November 19th, 2008, 10:14 PM

I thought 93 was when the cobra came back after a little break and they were 5 lug? I'd be curious in looking in to sn stuff. I've read they where based on the fox with a diff wrapper so if thats true then would that mean a disk rear from a 94,95 car bolt in since the spindles are the low buck way of 5 lugging? Kill two birds with one stone on that one. That could be some thing to look into.

txbkr · November 19th, 2008, 10:58 PM

North Racecars Cobra Replica and Mustang Parts Connection if you need anything, try these guys out. I got my set up from them and it worked out well. My only complaint is the quality of the rotor; made in china.

Arctic Fox · November 20th, 2008, 11:59 AM

Originally Posted by 3521

I thought 93 was when the cobra came back after a little break and they were 5 lug?

No, 93 Cobras were 4 lug, same size brakes as other V8s, but little different offset for disks.

93 Cobra R was 5 lug, 13" front 11.65" rear disk

ryans88gt · November 20th, 2008, 02:33 PM

You need offset brackets or cobra axles. One or the other.

16 inch wheels and 15 inch wheels will clear the 93 cobra style brakes (speaking from experience)

3521 · November 20th, 2008, 09:51 PM

Good to know, what about if a 94,95 rear axle as a whole will it bolt up?

ajb4507 · November 20th, 2008, 11:37 PM

Thanks for all of the info. I dont know alot about the braking system which is why i needed to ask. Im going to have my one friend help me out who is a mechanic so hopefully we can do it right. Im going to try to use the stock axles so we'll see how that goes.

November 18th, 2008, 03:45 PM	#1
ajb4507 Regular 1990 Mustang GT Join Date: Feb 2008 Location: Bethlehem, PA Posts: 59	Rear 4 lug disk brake swap questions. Im planning on starting taking out the drum brakes and swapping in a set of disks i picked up for free when i bought my motor. I believe that the parts i have came from a cobra or turbo coupe not sure which. Any way i have heard that you need the axles that the calipers and brakes came with, is this ture? Also if anynone has done this before some pointers or tips would ve greatly apreciated. __________________ Sticks and stones may break my bones, but a Chevy will never pass me

November 18th, 2008, 03:49 PM	#2
grnstang Hardcore Enthusiast 91 LX 13.7@101 Join Date: Oct 2008 Location: Norwalk OH Posts: 1,390	yeah I hope someone knows about this cause i'm looking to do the same __________________

November 18th, 2008, 08:58 PM	#3
Haggis13 Enthusiast 1993 Mustang GT Join Date: Sep 2006 Location: Ottawa, Ontario, Canada Posts: 589	It is not true if you buy a set of offset brackets for FOX length axles. North Racecars Brake Solutions __________________ Bart 93 Black on Black GT Kenne Bell S/C GIVE 'ER!

November 19th, 2008, 11:55 AM	#4
ajb4507 Regular 1990 Mustang GT Join Date: Feb 2008 Location: Bethlehem, PA Posts: 59	so if couldnt i just build a 3/4 inch spacer to do the same thing? __________________ Sticks and stones may break my bones, but a Chevy will never pass me

November 19th, 2008, 02:16 PM	#5
ajb4507 Regular 1990 Mustang GT Join Date: Feb 2008 Location: Bethlehem, PA Posts: 59	also i have the rotors the calipers and the mounting bracket. Is there anything else that i am missing. __________________ Sticks and stones may break my bones, but a Chevy will never pass me

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November 19th, 2008, 03:36 PM	#6
1BADSTANG Hardcore Enthusiast Join Date: Sep 2007 Location: long island Posts: 1,517	i did the rear disk brake conversion from ssbc, its a shitty set up. If you are doing it for free i have no advice but id put the money down and get that sweet wilwood rear conversion

November 19th, 2008, 07:53 PM	#8
old gray fox Newbie 89lx,93lx & 88gt Join Date: Jan 2008 Location: brandon,fl Posts: 18	you'll need 5 lug axles to run 17 in wheels to clear the calipers and you'll have to change your booster, are your rotors 11 in

November 19th, 2008, 10:14 PM	#10
3521 Regular 1988 Gt Cali car Join Date: Nov 2008 Location: 29 Palms Posts: 124	I thought 93 was when the cobra came back after a little break and they were 5 lug? I'd be curious in looking in to sn stuff. I've read they where based on the fox with a diff wrapper so if thats true then would that mean a disk rear from a 94,95 car bolt in since the spindles are the low buck way of 5 lugging? Kill two birds with one stone on that one. That could be some thing to look into.

November 19th, 2008, 10:58 PM	#11
txbkr Regular 08 GT-92 lx Join Date: Dec 2007 Location: AZ Posts: 54	North Racecars Cobra Replica and Mustang Parts Connection if you need anything, try these guys out. I got my set up from them and it worked out well. My only complaint is the quality of the rotor; made in china.

November 20th, 2008, 02:33 PM	#13
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,210	You need offset brackets or cobra axles. One or the other. 16 inch wheels and 15 inch wheels will clear the 93 cobra style brakes (speaking from experience) __________________ 88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it 04 Mach 1 12.7 @ 109 mostly stock - sold it 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

November 20th, 2008, 09:51 PM	#14
3521 Regular 1988 Gt Cali car Join Date: Nov 2008 Location: 29 Palms Posts: 124	Good to know, what about if a 94,95 rear axle as a whole will it bolt up?

November 20th, 2008, 11:37 PM	#15
ajb4507 Regular 1990 Mustang GT Join Date: Feb 2008 Location: Bethlehem, PA Posts: 59	Thanks for all of the info. I dont know alot about the braking system which is why i needed to ask. Im going to have my one friend help me out who is a mechanic so hopefully we can do it right. Im going to try to use the stock axles so we'll see how that goes. __________________ Sticks and stones may break my bones, but a Chevy will never pass me

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