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Richard S

Front Caliper Upgrade

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I know we have discussed the caliper upgrade using the Aurora Caliper. While wandering the wrecking yard, I happened on a 1999 Chev Malibu which appears to have light weight finned aluminum calipers. They appear to be similar in size to the Aurora [actually I was looking at an Intrigue which I think has the same caliper/rotor]. One would have to use the Do you think they will fit the Reatta, and if so, would they be preferable to the Aurora caliper because they reduce unsprung weight? I think the Malibu also uses a 5 X 115 bolt pattern like our cars.

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We need someone that has access to a Hollander manual to do some research on what cars used the same rotors and calipers and the 1997 and later Aurora.

So far all we have are a couple of people that have done the conversion but have yet supplied any real details.

We need (1) a list of donor cars so you can either get the parts from wrecks or go to the auto parts store and picke them up. (2) More details on the conversion, particulary the areas that are not "plug and play" ie, can you use the Reatta brake hose, or must you have the Aurora, or something else. (3) there was some posting about making sure you got the caliper adaptor....what is this, how about a picture, etc.

I would consider doing the conversion, but don't want to

stumble around when others have already done the initial work. We just need good detailed instructions.

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I can add more information, but we need a complete list in one place.......Example

Just checking 2001 models, the Impala, Lesabre (16"wheels) Regal, Pontiac bonneville, Cadillac Eldorado, Seville, and Deville all use the same rotors and calipers as the 1998 Aurora.

I still have the question about the caliper "adaptor"

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What is the advantage of the Camaro/Firebird calipers? Larger? 2 pistons?. I was taken by the Malibu set up because they are so light. I had meant to suggest in my original post that if the Malibu calipers fit, the Malibu rotors should also fit our cars because they have the same stud pattern. I will be running 17" rims so size of the caliper should not be a problem.

Barney makes a good point about the hoses. One would probably want to use the Malibu flex hose to the Reatta metal line.

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No adapter is needed with the "Aurora" calipers. The mounting holes have to be slightly drilled out with a 14mm or similar bit. I used a 14.3, I forgot the SAE equivelent.

You do not have to change brake lines. Your stockers will reach just fine, though maybe an extra inch would help. though stainless hoses would give better performance, and it wouldn't hurt to replace your old hoses.

Would upsprung weight be much of an issue?

I haven't looked into it much but late model F-body calipers would work a little better since they have two pistons. As far as I've researched, C5 calipers would work with an F body adapter, but rotors would be an issue...Vettes have a larger bolt pattern, though you could probably have them redrilled.

The front Aurora calipers, as mentioned, are used in most large/midsize GM cars from the late 90s to early 2ks. If you use the Advance catalog online you can click to see what else it fits. The rears are more specific though.

I'd find some shytti calipers from a yard then use those to exchange. I bought some from Shroyer's (remember to also get the bracket, probably another $20). Remanned Cardone loaded calipers from Advance are slightly cheaper than buying used calipers and brackets and getting Wearever Gold pads, and they're not all rusty and junk.

Fronts (I picked a '98, which is what I'm using):

BUICK

1997 - 2004 CENTURY

1997 - 2004 REGAL

2000 - 2005 LESABRE

1997 - 1999 RIVIERA

1997 - 2005 PARK AVENUE

CADILLAC back to top

1997 - 2005 DEVILLE

1997 SEVILLE

1997 - 2002 ELDORADO

2003 - 2004 SEVILLE

CHEVROLET back to top

2000 - 2005 IMPALA

1997 - 2005 VENTURE

2000 - 2004 MONTE CARLO

OLDSMOBILE back to top

1996 - 1999 AURORA

1998 - 2002 INTRIGUE

2001 - 2003 AURORA

1997 - 2004 SILHOUETTE

PONTIAC back to top

2000 - 2005 BONNEVILLE

2005 MONTANA

1997 - 2003 GRAND PRIX

1997 - 1998 TRANS SPORT

1999 - 2003 MONTANA

And rears:

BUICK

1997 - 1998 PARK AVENUE

1995 - 1998 RIVIERA

OLDSMOBILE back to top

1995 - 1998 AURORA

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Some people suggest not to get the Wearever rotors from Advance, but I've pushed em pretty hard and haven't warped em yet.

And also, with the pads that came with the front remanned calipers, they seem to make quite a bit less dust than the stock/normal Reatta setup. I'm thinking this could be because less effort is needed

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with the Camaro calipiers there is not drilling or having to use a sleeve. Use F-body mounting braket and caliper. OH and they are extremely light.

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According to the W-body board, I'd actually have to use bushings with the F-body calipers, because front Aurora calipers are the same as W body calipers, and they had to use them grin.gif

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Just from the looks of the parts, the ideal caliper is the 99-02 Camaro aluminum dual piston. It certainly is not the same as the Aurora, which is a cast iron single piston affair. We could not, however, use the Camaro rotor because the bolt pattern is different. So if we used the Camaro caliper, which seems to require a bushing to fit our cars, which rotor would we use?

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F-14, looking at your brake post I found you did have to drill your holes out. When the GTP guys do there F-body upgrade they must use a 14 mm spacer. So for us there is no drilling for this upgrade, we already have 14mm holes.

GTP brake link:

http://www.clubgp.com/newforum/tm.asp?m=2434239&p=7&tmode=1&smode=1

F-14's brake link: http://forums.aaca.org/ubbthreads.php/ubb/showflat/Main/88008/Number/374111#Post374111

I also double checked. The 97 Aurora and the 98-2002 camaro have the same part number for the front calipiers:

Part Number: 56641RGS

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Yup, according to my calculations, we would not have to drill for F-body calipers but would need bushings.

How about the C5 upgrade?

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bushings? which ones?

I am not too interested in the C-5 upgrade. Too expensive and hard too find if you like the junkyard route. I just do not think the benifit would out wiegh the costs to do it and maintain it. You would probably pick up a tiny bit of wieght and they may not fit under a 17" rim. But I will research and see what I can come up with.

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I don't think that the 97 Aurora and the 2000 Camaro have the same caliper. For example, the AC Delco number for the Olds is 172-1634/35 at $125. The Camaro is 172-1603/04 at about the same price. The Olds, as I've said is single piston cast iron. The Camaro is dual piston cast aluminum.

As to rotors, the Camaro bolt pattern is 5 X 120mm while the Olds and Reatta are 5 X 114.3. I am not sure about the thickness of the rotors.

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The calipiers are not the same. The rotors are sold under the same part number from partsamerica.com (aka schucks, checkers, advanced)

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I agree that the rotor number for the 2000 Camaro and the 1997-99 Aurora are the same, though I thought the Camaro and Aurora had different bolt patterns. Guess not.

As Barney sagely pointed out, if this is going to become an accepted upgrade, we need to collect all the relevant materials and instructions in one place. This means deciding on the best choices for upgrades that are readily available at reasonable cost, that do not involve major modifications.

1. So far, if the mount does not require any extensive modifications, the Camaro dual piston aluminum caliper seems like the best choice. A remanufactured caliper with the mounting bracket [unloaded] runs $38 + core from Rockauto.com.

2. Have we decided whether the Camaro caliper will require that we bush or drill the Reatta?

3. Since it appears the numbers are the same, either the Aurora or Camaro rotors should fit the Camaro and should fit our hubs?

4. The Camaro upgrade would require at least 16" wheels.

5. What about brake lines. I don't think the Reatta brake line will mate to the Camaro caliper. Do we know if the Camaro brake line will work with our suspension setup?

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When I get out of Iraq and back to the states I will do the whole upgrade. I have already purchased most of the parts, I just ran out of time before leaving for here. I will be back state side by Nov 1st. I will make this part of my Reatta upgrade my first priority

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I'll probably do mine well before Nic gets back since the pads are already pretty low. I need to find a pair of Camaro calipers in the yard so I can make sure they will fit before I order them and the rotors. F-14, what is your feeling about using these versus the Aurora caliper?

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I am curious as to why the big interest in the different calipers/rotors. In my opinion those of us with the Teves brake system should not be changing rotors and calipers. These are specialized systems. What's to say the master cylinder will keep up with a dual plunger caliper? I think the brakes are fine and extreme caution should be used with a brake system change. Please explain this to me. Thanks

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That is one of the risk, one person makes a change (upgrade) and others think they have a better idea. Time will tell.

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Though we dont know of anyone that has tried F body calipers with a Teves system, I'd try the experiment. I'm certain that two pistons would provide better performance but I don't know to wat extent...braking systems aren't my specialty.

Keep in mind though that thw W body guys have used the F body calipers without any trouble

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