D52 Caliper Rear Disc Brake Brackets

[csbatey]

do you have to run a proportion valve! thanks

[Captainfab]

Yes, you have to run a proportioning valve of some sort. Some guys run the disc/drum proportioning valve with an adjustable on the rear line. Others run just a disc/disc proportioning valve.

Originally Posted by csbatey

do you have to run a proportion valve! thanks

[joeelutz]

Were there any GM vehicles made that used a D52 style caliper on a rear disc brake with a drum style parking brake inside the rotor?

[Captainfab]

No, none that I know of. By the time GM went to the e-brake shoes inside the rotor, they had gone to a different style of caliper.

Originally Posted by joeelutz

Were there any GM vehicles made that used a D52 style caliper on a rear disc brake with a drum style parking brake inside the rotor?

[68 TT]

Originally Posted by joeelutz

Were there any GM vehicles made that used a D52 style caliper on a rear disc brake with a drum style parking brake inside the rotor?

There is something close that can work with the D52 calipers as well as any other caliper designed for 1.25" thick rotors like the LS1 Camaro & C4/C5 Vette PBR front calipers. The 65-82 Corvette rear rotors are 11.75x1.25 and use a drum brake parking brake inside the rotors. Only down side is they are 5 on 4-3/4" bolt pattern but they can be drilled for a second 5 on 5 pattern to work on our trucks.

They fit with 15" rally wheels and you can get all the e-brake parts made from stainless steel from the Vette restoration places pretty cheap.

You can get the backing plate parts from a JL-8 optioned 4-wheel disc 69 Camaro application that fit up easier to a straight rear axle vs. the Vette parts designed for their IRS but the parts are pretty pricey. I have been tinkering around with some inexpensive ways of using the parking brake parts with a fabricated backing plate for the standard rear axle but haven't had the time to test it out and I don't have all the e-brake parts to make it functional.

NAPA sells the American made Vette rotors for under $40 too.

[68 TT]

I have seen some newer AWD Astro vans with six lug wheels (the same wheels that came on my 03 Tahoe) so I am assuming they are a 2003 model year or so. Have you looked into using the D52 brackets with these rotors on a 4x4 application?

http://www.napaonline.com/Search/Det...+50014+2014004

They are 1.14" thick and 12" diameter so I don't know if the D52 caliper can handle that for sure. You would think that 1/10th of an inch smaller would be OK.

[Captainfab]

I guess I haven't paid much attention to the newer Astros. I'll have to check into those and see what style of parts are used. I do already have something in mind for a 6 lug rear disc, but I'm reluctant as I'm not sure how well they would sell. Thanks for the info....

Originally Posted by 68 TT

I have seen some newer AWD Astro vans with six lug wheels (the same wheels that came on my 03 Tahoe) so I am assuming they are a 2003 model year or so. Have you looked into using the D52 brackets with these rotors on a 4x4 application?

http://www.napaonline.com/Search/Det...+50014+2014004

They are 1.14" thick and 12" diameter so I don't know if the D52 caliper can handle that for sure. You would think that 1/10th of an inch smaller would be OK.

[68 TT]

Originally Posted by Captainfab

I guess I haven't paid much attention to the newer Astros. I'll have to check into those and see what style of parts are used. I do already have something in mind for a 6 lug rear disc, but I'm reluctant as I'm not sure how well they would sell. Thanks for the info....

I will be your guinea pig on the 6-lug rear disc if you want.

My 67 is sitting on a square body 4x4 half ton chassis so it is 6-lug and I have a set of the El Dorado rear calipers.

I was thinking that the 88-98 new body style 4x4 slip on front rotors might work for this. I keep meaning to grab a set from Pull & Save to test out but always run out of time when I am out there. I will look them up on NAPA's site and get some idea of the offset and thickness to see if it is even worth picking up a set to test out.

[joeelutz]

Originally Posted by 68 TT

There is something close that can work with the D52 calipers as well as any other caliper designed for 1.25" thick rotors like the LS1 Camaro & C4/C5 Vette PBR front calipers. The 65-82 Corvette rear rotors are 11.75x1.25 and use a drum brake parking brake inside the rotors. Only down side is they are 5 on 4-3/4" bolt pattern but they can be drilled for a second 5 on 5 pattern to work on our trucks.

They fit with 15" rally wheels and you can get all the e-brake parts made from stainless steel from the Vette restoration places pretty cheap.

You can get the backing plate parts from a JL-8 optioned 4-wheel disc 69 Camaro application that fit up easier to a straight rear axle vs. the Vette parts designed for their IRS but the parts are pretty pricey. I have been tinkering around with some inexpensive ways of using the parking brake parts with a fabricated backing plate for the standard rear axle but haven't had the time to test it out and I don't have all the e-brake parts to make it functional.

NAPA sells the American made Vette rotors for under $40 too.

Interesting.
Great info. Thanks.

[lts70]

I am going to get wilwood D52 calipers front and back. I have stock 5 lug 72 frontend brakes and have captinfabs bracket and astro rotors in the back. What size calipers (pistons)should I use on front and back. part numbers would help. Thanks, dont want to make an expensive mistake.

[Captainfab]

Wilwood recommends to run the dual 2" diameter pistons on the front, and the dual 1.250 diameter pistons on the rear. Both will be for the 1.28" thick rotors. You want your front to do the majority of the braking. Of course you can tune this to your liking with an adjustable proportioning valve in the rear line.

Originally Posted by lts70

I am going to get wilwood D52 calipers front and back. I have stock 5 lug 72 frontend brakes and have captinfabs bracket and astro rotors in the back. What size calipers (pistons)should I use on front and back. part numbers would help. Thanks, dont want to make an expensive mistake.