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05-17-2011, 06:01 PM | #1 |
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Join Date: May 2011
Location: Fort Worth, Texas
Posts: 468
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Re: D52 Caliper Rear Disc Brake Brackets
Thanks Capt'n! Any idea of a front brake improvement for the early '80s C30 duallys?
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05-17-2011, 11:19 PM | #2 |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: D52 Caliper Rear Disc Brake Brackets
I haven't really dealt with the C30's, so I'm not sure. It is possible that you may have the smaller of the brakes available for the C30's. I do know that there were bigger drums available on some of the dually's in the rear, so maybe there is a bigger caliper available? Does your truck already have hydroboost?
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE Last edited by Captainfab; 05-17-2011 at 11:20 PM. |
05-18-2011, 07:02 AM | #3 |
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Join Date: Jun 2009
Location: Fort Erie , Ontario
Posts: 525
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Re: D52 Caliper Rear Disc Brake Brackets
Yes my truck allready has hydroboost. I have a 76 cc dually which I am converting to 4wd. I have read before about possible clearance issues with d-52 calipers with smaller wheels. Just trying to clear it up hopefully with someone with experience. I have heard about using a 2003 chevy express van rotors on the c30's instead of the 3/4 ton front rotors, with 1/4" spacers. I have a dana 70HD.
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05-18-2011, 11:17 PM | #4 | |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: D52 Caliper Rear Disc Brake Brackets
When converting to rear disc on any of the 8 hole differentials, you need to run at least 16" wheels. Otherwise you will need to do a bunch of grinding on the outside of the caliper. I'm only familar with the conversion using the '73+ K20 rotors. What is the advantage to the Express/Savana rotors? Are they a larger diameter?
Quote:
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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05-19-2011, 07:03 AM | #5 |
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Join Date: Jun 2009
Location: Fort Erie , Ontario
Posts: 525
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Re: D52 Caliper Rear Disc Brake Brackets
I do not have the facts but they appear to be altleast 8" deep, that would get the caliper away from the wheel, as appose to the 3/4 ton rotor which is probebly only 2" deep.
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05-19-2011, 11:02 PM | #6 |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
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Re: D52 Caliper Rear Disc Brake Brackets
The '71-'86 K20 front rotors are 12.50" diameter, 1.29" thick, and 2.81" in overall height. The '99-'10 Express/Savana front rotors are 12.79" diameter, 1.50 thick, and 3.51" in overall height.
So yes they are a bit deeper, .70" to be exact. And they are slightly larger in diameter, and thicker as well. However you won't be able to use a D52 caliper on these, as they are just too thick. You would likely have to use the Express/Savana rear calipers, which may not be a bad thing, since I believe they are a dual piston caliper. You might also be able to use the rear rotors and calipers for the Express/Sanvana. The rotors are 13.0" diameter, 1.40 thick and 3.42" in overall height. This is the first that I've heard of using these rotors for a rear disc conversion of this type, so I don't know for sure if you could run 15" wheels without grinding these calipers also. Where did you hear/read about this?
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
05-20-2011, 08:08 AM | #7 |
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Join Date: Jun 2009
Location: Fort Erie , Ontario
Posts: 525
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Re: D52 Caliper Rear Disc Brake Brackets
I seen another guy on pirate 4x4 experimenting with this set up but he was just using 3/4 ton caliper thou as it was strictly for off road -no need for the emergency brake. He is running the e4xpress van rotor with 1/4 spacers for caliper aligment with his 3/4 ton calipers.
Thanks for the specs it is greatly apprecited. I will be running 16" steel dual factory steel wheels with my dana 70hd. I am in the middle of a restoration converting a 1976 2wd CC crewcab to 4wd. |
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