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Old 05-28-2007, 10:15 PM   #1
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Default dual piston calipers

Today I was looking at the brake calipers on a 92 cutlass supreme they are dual piston and the rotors maybe a little bigger than the ones on my 00 ssei. Has anyone tried to do a swap. I have 22" wheels and I want to fill up all that empty space without breaking the bank.
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Old 05-29-2007, 12:33 AM   #2
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With 22" rims, you NEED to upgrade your brakes.
Try finding some 1998+ F-body brakes, preferably upgraded units for them.

I have been actively researching the same sort of upgrade for us 92-99 owners for the past 2-3 weeks.... a little something else I want to add to my list of bolt on upgrades for the previous gen cars.
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Old 05-29-2007, 02:03 AM   #3
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Cutlass is a considerably lighter car. I'm thinking that the brakes might not be as powerful. If you really want two-piston brakes, take a look at the prices on a set of the Bonnie GXP brakes. It'* a guaranteed fit, and you can use all four corners, so your ABS won't get thrown off by differing braking force.
Also, the GXP brakes are 13" discs, IIRC. Park Avenue Ultra rotors after 97 are as well, and would fill out your wheels nicely, without having to change master cylinders, but they're single piston.
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Old 05-29-2007, 02:24 AM   #4
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The 98+ F-Bodies have larger dual-piston front calipers that is a direct bolt on for the 2000+ H-bodies and 97+ W and C-bodies.
I know the W-body guys and gals who have done the swap are more than impressed with the improved stopping..... which should be mandatory if going to even 18" wheels (GM no doubt went with the larger brakes because of the larger rims, or realized they could go larger with the rims if they had already planned on the larger brakes for the GXP).
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Old 05-30-2007, 11:57 AM   #5
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Quote:
Originally Posted by OLBlueEyesBonne
The 98+ F-Bodies have larger dual-piston front calipers that is a direct bolt on for the 2000+ H-bodies and 97+ W and C-bodies.
I know the W-body guys and gals who have done the swap are more than impressed with the improved stopping..... which should be mandatory if going to even 18" wheels (GM no doubt went with the larger brakes because of the larger rims, or realized they could go larger with the rims if they had already planned on the larger brakes for the GXP).
Not to steal this thread, but is there anymore info on this swap (using 98+ F-Body brakes)? P/N and maybe a short how to?
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Old 05-30-2007, 01:51 PM   #6
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Most of the info I've obtained was over at www.3800pro.com and www.clubgp.com -the 1997+ W and C bodies have the same brakes as 2000+ Bonneville'* and Lesabres so anything that is an upgrade for them is an upgrade for the Bonneville.
Also, I should point out that I am still trying to figure out if the Bonneville, Lesabre and Park Avenue came with the Impala cop car large brakes (would seem logical considering the difference in size of the two body styles)

I am also still researching a good cheap set of larger rotors for F-body'* that would work on cars here with extremely large rims (18" and over) for bother 92-99 and 2000-2005 generation H-bodies.
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Old 05-31-2007, 11:33 AM   #7
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Thanks to OLBlueEyesBonne for suggesting where to head for some info. I found these links with great info on doing the conversion. The first link provides P/N if you need to buy stuff new.

Go to the mods section and then F-body brakes for the below link.
http://www.scacgp.com/

Besides the first post, on page 3 Ridin on Chrome provides detail instructions on the install along with part numbers.
http://www.clubgp.com/newforum/tm.as...mode=1&smode=1
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Old 05-31-2007, 12:10 PM   #8
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There seems to be a further ability to then use C5 Z06 calipers and rotors with an added adaptor plate. This would allow for the use of the 12.8" rotors. Which would probably be the best bet for 22 rims.

http://www.speedspecialty.com/store/...=c5fbodybrakes
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Old 06-08-2007, 09:08 PM   #9
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I've been looking around the site, website, aftermarket, and car stores trying to find information on brakes on our cars and her'* what I've come up with.

1. Bonneville SLE'* & SSEi'* have 12" brakes on them single piston calipers.
2. Bonneville GXP'* have 12.8" rotors with dual piston calipers and considereably more pad surface area.
3. 98+ F-Body brakes are 12" with dual piston calipers that will fit on the Bonneville'* when the caliper mounting bracket'* are drilled and tapped to an M14.

Please correct any of the above if necessary I'm not preachin gospel here.

I've been trying to find larger brakes for our SSEi and not being a car popular for soupin up it'* been kinda tough but here'* what I THINK the options are in order of price

1. Find some 98+ F-Body calipers, mounting brackets, rotors, and pads. Modify mounting bracket and bolt up. More pad surface area but still 12" rotors. May fit 16" wheels?
2. Find some 04-05 GXP calipers, mounting brackets, rotors, and pads. Bolt up. More pad surface area and larger 12.8" rotors. 17" wheels required.
3. Baer makes an aftermarket kit for the W-body comprised of 12" rotors and dual piston calipers. The last version of the catalog said this would work on a H-Body too. Bolt up (I'd hope) Better looking caliper but still 12" rotor. Unknown clearance issues. 16" wheels may fit? Also make a kit for the back as well 12" rotor.
4. SSBrakes has a 13" kit for the fronts with a dual piston caliper setup. Unknown clearance issues. They say 18" wheels needed but usually with a 13" setup you can get away with 17'*. Dunno different caliper arangement maybe

Now some ideas that have been running though my head.

1. 2006-07 Impalas have a dual caliper setup on them (Same as GXP?). Guessing a 12" rotor but not sure. Given it'* not a performance car you can get calipers pretty cheap on e-bay. Also I'm not sure if this is on all trim levels. Would have to be looked into I guess.
2. Since you can bolt up F-Body calipers with minor modifications (drill & tap) does it not make sense that you may be able to get an aftermarket brake system for an F-Body and make similar modifications (drill & tap) and be able to bolt this up? Baer has a 13.15" GT+ front upgrade package 2 piston caliper 2 piece rotor for the 98+ F-Body. 17+ wheels are required but will have to verify fit with template to see if it will clear our 17" wheels. Price also unknown but I'm gonna check into it a little tonight. If I can be reasonbly sure this might work and find a store with a good return policy this is the route I'd like to go. I don't mind being a guinea pig.
3. Baer also makes a 14" 6 piston setup if you've got the moolah to blow. Gonna be expensive. Also 18" wheels a minimum and clearance a big factor on these puppies as they protrude quite a bit more from the rotor surface. Says these are for W-Body as well.

Just purchased a set of GXP calipers and mounting brackets today on e-bay so I'm not even sure what I'm gonna do.

Please if you have different information than this let me know I'm not saying all this is correct it'* just the puzzle pieces I've found that I've tried to put together.
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Old 07-07-2007, 09:28 PM   #10
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today I in stalled the dual piston calipers from a 98 trans am everything fit perfectly but my master cylinder just isn't strong enough to keep the pressure. the pedal goes to the floor as soon as I start the car. Will the master cylinder from the trans am work on my 2000 ssei. HELP PLEASE.
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