View Full Version : pdq67 13" vette brakes question for you??!!


67firebird
Mar 25th, 01, 09:43 AM
You respondded to my 13" vette brakes post on the CBB board. And I already have 13" rotors and PBR calipers off a 96 corvette. Can I use the PBR calipers? or do I need to use those truck calipers? Also if I machine my top drum brake spindle boss down even with the lower and I make my bracket like on David Pozzis page (thanks David and Rich) out of 1/4 inch or 5/16 will everything line up? I was planning on using brackets from Baer but they didn't seem very supportive of anything other than buying their kit, which I understand, but they also said they wouldn't work. I don't mind making a bracket, but I just want it to work. So should I get the 1 piston truck calipers, I would like to use my glossy black PBR ones though. Thank you

davidpozzi
Mar 25th, 01, 12:13 PM
You can use the corvette calipers and they are easier to make a bracket for than the single piston calipers. Pdq is using the truck calipers which will be cheaper but a little heavier than the vette calipers.
The single piston calipers need ears on the bracket to guide the caliper, the vette calipers don't.

There is an E-Mail address for Rich that I put on the vette brake swap page, you can ask him what thickness he used for the bracket and any other questions.
David

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Check my web page for First Gen Camaro suspension info:
David's Motorsports page (http://ourworld.compuserve.com/homepages/David_Pozzi/)
First Gen Suspension Page (http://ourworld.compuserve.com/homepages/David_Pozzi/first_gen_suspension.htm)
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Can Am Vintage Racer

[This message has been edited by davidpozzi (edited 03-27-2001).]

Markus
Mar 26th, 01, 11:15 AM
I want to do the same conversion. Like my infos (see some weeks ago on this page) the conversion will run.
I installed the 13" rotors on the original disc brake spindles and made a plastic model of the bracket you need.
It seems that the bracket isn`t very complicated, but with disc brake spindles the bracket holes are 10 mm different so you have to do some milling.
You need an over all height about approx.27 mm to the Corvette brake caliber brackets (or you can do an exact bending work.)
More ? Send a mail !

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69`Camaro, 92`LT 1 / 4L60

Doug Harden, Pres CICC
Mar 26th, 01, 01:10 PM
Does anyone have a measured drawing or a template that I can create a measured drawing from for the bracket required for Dave's Vette brake conversion?
Or for that matter just a few of the actual dimensions between the holes.

I'm an Architect by trade and can create a dimensioned CAD drawing of this bracket for all to use.

I'm gonna' sell these Wilwoods and do the conversion.

BTW, I just put 4th gen Z rear brakes on my stock 8.2" 10 bolt and they fit great! Shock interference on the driver's side though...I got around it w/ a minor mod (anyone got any better ideas for relocating the lower shock mount?) and had to slightly shim the main bracket from side to side to get the caliper brackets perfectly centered on the rotors...no biggie.

[This message has been edited by Doug Harden, Pres CICC (edited 03-26-2001).]

67firebird
Mar 26th, 01, 03:12 PM
Doug that the same rear brake swap I'm planning. Did you hook up parking brakes. I'm thinking of installing a 4th Gen. center console and lever style parking brakes. Anyway I've done a bit a work on CAD and would draw one up after I make one, but I don't have the software on an accesable computer. But that would be nice to have something machined to make this an even easier bolt on.

Doug Harden, Pres CICC
Mar 26th, 01, 04:44 PM
No, I didn't use the parking brakes...in fact, I'm not sure they would have fit with them installed....due to the counter weights.

The driver's side shock needed to be threaded inbetween the axle tube and the piston on the caliper. This necessitated installing the lower shock mount on the front of the two ears that it used to be mounted in between of...I'd like to change this in the future for a slightly stronger mounting.

I welded the two flex line header brackets (w/ some trimming) to the spring perches.

They really work great and were basically free due to my extra parts from all the 4th gen work I do.

1969 RSSS; 1993 LT1, LT4 Hot Cam, 1.6 roller rockers, springs, etc..., Ported heads & intake, Hooker Super Comp headers, 24# injectors, Ed Wright Custom Chip, Airfoil, Custom intake, K&N cone filter, KB pistons, 11.25:1 compression, 425 fwhp, iAC, dual exhaust, 4L60 A4 tranny, TransGo Shift kit, external tranny cooler fed w/ Aeroquip hoses, correct console shift plate, SLP 2600 rpm stall converter, Full Autometer guage package, Auburn Pro posi & 3.73 GM Motive gears, 4th gen rear disc brakes, Urethane suspension bushings, Wilwood four piston caliper front brakes, proportioning valve, 17"X9" Chrome wheels w/ 275/40/17's in the rear and 255/45/17's in front, Gas shocks, New leaf springs, 550# front springs, 1 1/4" sway bar, Modified stock 3 core radiator, Custom PS hoses, Custom wiring harness.

69er
Mar 27th, 01, 12:28 PM
Hey david, can you check out this site (http://www.aa-mfg.com) part numbers #AA-113-A and #AA-049-A. You said that the Vette calipers don't need the ears on the brackets but the single pistons do. How do they mount calipers on these brackets. I was thinking of putting them on my rear wheels. But wondered about the ears. My buddy did it but didn't mention anything about that part of it.

69er

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69 Camaro 454
71 Nova 454

If your not living on the edge then your taking up too much space

davidpozzi
Mar 27th, 01, 01:00 PM
69er,
Let me see if I can paste this image in here-
http://www.aa-mfg.com/catalog/AA113CLMP.JPG

These are sold for racing without the bent over ears on them so I guess they work but suspect the calipers would rattle more and may wear the brake pads crooked.
I have no experience with these brackets but GM must have put the added support on theirs for a reason.
I'm not saying you couldn't use these brackets, but there may be noise or other problems if you do.
By the way Speedway sells brackets that have the bent over guide pieces.
I used these to adapt big brakes to a 47 Cadillac.
http://ourworld.compuserve.com/homepages/David_Pozzi/47_cad_brackets.jpg
David

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Check my web page for First Gen Camaro suspension info:
David's Motorsports page (http://ourworld.compuserve.com/homepages/David_Pozzi/)
First Gen Suspension Page (http://ourworld.compuserve.com/homepages/David_Pozzi/first_gen_suspension.htm)
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Can Am Vintage Racer

[This message has been edited by davidpozzi (edited 03-27-2001).]

69er
Mar 27th, 01, 05:06 PM
Damn your good.

69er

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69 Camaro 454
71 Nova 454

If your not living on the edge then your taking up too much space

treyman
Mar 29th, 01, 06:04 AM
One question, on the 13" brake info and pick's it says nothing of backing plated are they needed or not? I'm new to all these conversions so I wasn't quit sure. Thanks, Mike

pdq67
Mar 29th, 01, 08:01 AM
I assume the reason GM put the bent over "guide" tabs on the caliper brackets was to stiffen them to better resist the braking torque that has to transfer from the bracket through the bolts to the spindle or axle (front or rear designs) due to the offset of the mount to the rotor. IMHO. pdq67

PS, And, yes, A-A Mfg. was where I got my first template as a guide bolt pattern for my bracket for the 13" rotors.

davidpozzi
Mar 30th, 01, 08:10 AM
I wouldn't worry about shields, they are only needed when driving on muddy sloppy roads.
I don't think the aftermarket big brake kits have shields either.
David

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Check my web page for First Gen Camaro suspension info:
David's Motorsports page (http://ourworld.compuserve.com/homepages/David_Pozzi/)
First Gen Suspension Page (http://ourworld.compuserve.com/homepages/David_Pozzi/first_gen_suspension.htm)
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Can Am Vintage Racer