How-to; DIY 2 pot brakeupgrade

[KAinjection]

^ My 98 ES-V6 had 15" Rims. The rear disc is 273mm=10.75"

[Mazda_Powered]

So what rear spindle/hub setup are you using in the rear Ryan?? The GD chassis disks?

[FE3-323]

theres a fitment problem when using "XX" chassis discs on BG's *hat depth*

its largely up for grabs what i'll do right now....... i have slightly larger fronts with the F2T brakes. i know i need slightly more in the rear as the bias is already weak from factory

[steeb]

5x114.3

not sure if you guys already found rotors for the 5 lugs in 15" wheels but here are a some possible options for diameters you guys are looking for. looks like the mounting depths are fairly close...

93+ mr2 came with 15's
93-95 turbo mr2 came with 15's and had 10.83" (275mm) x 1.102 (29.845mm) front and 11.06" (281mm) x1.575" (21mm) rear rotors.
front

http://www.theautopartsshop.com/search/LargeImage.aspx?imgPath=BR/25566.jpg

rear

http://www.theautopartsshop.com/search/LargeImage.aspx?imgPath=BR/25567.jpg

what calipers are you guys using on the rears??

[steeb]

bg/ec chassis rotor

http://www.theautopartsshop.com/search/LargeImage.aspx?imgPath=BR/25437.JPG

So i figured, might as well do a comparison of the hat depth.

so the bg rotor is 10.1 or 257mm has a hat depth of 39mm or 1.535" with .87" or 22.1mm

the 10.83" or 275mm front mr2 rotor has a hat depth of 1.610" or 40.894mm for a dept difference of of 0.379" or 9.636mm... quite a bit

the 11.06" 281mm rear mr2 rotor has a hat depth of 1.575" or 40.05mm for a dept difference of of 0.040" or 1.05mm... i think this one should be pretty good if it clears the caliper

[FE3-323]

1mm is sustainable by all means. 2-5mm is more practical if you have to shift the OE caliper. depending on rotor thickness of course & or if your switching to another type of caliper.

PS "mm" are so much easier to understand

[steeb]

what do you mean by sustainable?

im used to dealing with inches and mm's at the same time with wheel specs and such so it didnt really bother me figuring out measurements. what i thought was weird was how brembo uses either inches or mm's for their measurements instead of choosing one or showing both

i edited the posts and added some more rotor dimensional information for clarification.

[russian239]

BA VS BG
only pic i have http://img245.imageshack.us/img245/5...27smallge0.jpg

It is 2011 and the link does not work now Does anyone have still have it?

I am sorry if that's a dumb question - are we looking for BA V6 spindles (the piece which is connected to the arms/tie rod etc) or BA V6 bearing hubs (the part which the wheel is attached to?)
So I guess - what is special about BA V6 whatever? Is is different caliper mount pattern or different diameter of some part? I do have a way to grab BA V6 parts from Europe, just need to confirm which part I need

[300BHPZE]

The spindle is the steering knuckle. The large cast iron part which connects the strut to the lower control arm. That is the part you need because it has a different caliper mount spacing which allows other caliper brackets to be used. The BA bearing hub is a 5 bolt hub so unless you want to convert to 5 lug wheels you need to push them out and push in the BG hubs with new bearings.

[russian239]

The spindle is the steering knuckle. The large cast iron part which connects the strut to the lower control arm. That is the part you need because it has a different caliper mount spacing which allows other caliper brackets to be used. The BA bearing hub is a 5 bolt hub so unless you want to convert to 5 lug wheels you need to push them out and push in the BG hubs with new bearings.

Thank you 300BHPZE, this clarifies a lot!

So, BG has different distance between caliper mounting holes. Is there any known DIY bracket design for BG spindles? Do not like used parts prices in Europe, two places have quoted around $100 per each spindle without delivery...

[300BHPZE]

the problem with the BG spindle is that is uses a different design than other cars for the brake calipers. A BG caliper bolts directly to the mounting tabs and the pads slide down snugly between the tabs. Other cars like the Subaru, Gen1 626 and Millenia the calipers mount to a bracket which is bolted to the spindle. This allows for a lot more interchangeability. Because of the shape and position of the stock BG tabs they wind up being in the way when you try to mount any other caliper with anythign smaller than like a 12" rotor. A couple of other guys out there have modified their stock spindles to accept a bracket or whatever. that's up to you.

[russian239]

A couple of other guys out there have modified their stock spindles to accept a bracket or whatever. that's up to you.

Any links to BG spindles mod reports? What are the keywords - I have failed to locate any info so far

[MX2GS]

Ok, so I've read this thread, and the various 5-lug threada, and I have a few questions for an idea. From reading this and cross referencing info from Probetalk, I've gathered that the entire front spindle/hub/brake setup from a 2nd gen MX-6/Probe will bolt into the front of a BG car. From here I've gathered that the entire rear spinde/hub/brake setup of a 1st gen MX6/Probe/626 will bolt into the rear of a BG car. The rear I'd gladly do as it is just to get rear discs. My question is, can the 1st gen MX6/Probe/626 setup use the Subaru 2-pot calipers? I'm seeing that you guys are using the 1st gen MX6/Probe/626 brake bracket for the Subaru calipers, but are there other factors that keep this from working on the GD spindle?

I don't really care about 5-lug, but I already have the 2nd gen probe's complete front setup, so it'd reduce my costs a lot if I could use those parts for the 2-pot swap, which I feel is a good idea(along with bigger rotors). I plan to buy some aftermarket wheels anyway and they're the same price for 4 or 5-lug. If no one knows, I guess I'll be the first to figure it out!

[300BHPZE]

An MX-3.com member named jaydog5678 had worked out a way to modify the existing spindles and add a small bracket to attach a Willwood Dynalite 4 piston caliper. Scroll down this page about 3/4 and you'll see a picture.

http://www.mx-3.com/phpBB3/viewtopic.php?f=39&t=63328&hilit=brakes&start=30

[300BHPZE]

Ok, so I've read this thread, and the various 5-lug threada, and I have a few questions for an idea. From reading this and cross referencing info from Probetalk, I've gathered that the entire front spindle/hub/brake setup from a 2nd gen MX-6/Probe will bolt into the front of a BG car. From here I've gathered that the entire rear spinde/hub/brake setup of a 1st gen MX6/Probe/626 will bolt into the rear of a BG car. The rear I'd gladly do as it is just to get rear discs. My question is, can the 1st gen MX6/Probe/626 setup use the Subaru 2-pot calipers? I'm seeing that you guys are using the 1st gen MX6/Probe/626 brake bracket for the Subaru calipers, but are there other factors that keep this from working on the GD spindle?

I don't really care about 5-lug, but I already have the 2nd gen probe's complete front setup, so it'd reduce my costs a lot if I could use those parts for the 2-pot swap, which I feel is a good idea(along with bigger rotors). I plan to buy some aftermarket wheels anyway and they're the same price for 4 or 5-lug. If no one knows, I guess I'll be the first to figure it out!

I'm not convinced of the swapability of the Probe/MX-6 front assembly. It's definitely not the same as the BA spindle, but I suppose it could work. Looking at the pics that were posted in this thread, the balljoint is offset from where it is on the stock spindle so that's going to significantly affect the castor. Having said all that, the 2 piston Subaru caliper will bolt straight into the MX-6 bracket. Not sure how the spacing will be affected but at the most you would just need a couple of washers to center the rotor in the caliper.