Yet another possible brake upgrade solution

[belize1334]

The problem is that prop-valves always have a knee point. And so adding a second one would give you two knee points and be very difficult to tune.

But, this has me thinking about the '04 Outlander rotors. 11.55" and bolt on for 5-lug DSM. I wonder if they'd fit inside camaro calipers/brackets. The 300zx rotors are 11.02". Is there an extra 1/4" of clearance between the rotor and the caliper? If so, you could be running 11.5" front (close to 20% better dissipation)with the smallest (38.1mm) PBR pistons which would shift the for aft ratio from 2.9 to 2.6 for a brake bias of 72% compared to factory 74% (which is actually significant). Then you get the backs doing more work (they're lazy in stock form) which further relieves the demand up front. I'm into it!

 

[toybreaker]

Quoting abc123:
In all honesty, I've not run into a master cylinder issue that would be fixed be having a larger bore. A bigger bore just means more pedal travel, right?


Quoting belize1334:
^^ More pedal travel and more clamping force for a given input pressure.









Increasing master cylinder bore size decreases system pressure (for a given pedal pressure) and will result in reduced clamping force, as well as decreased pedal travel.

 

[89Mirageman]

Quoting belize1334:
The problem is that prop-valves always have a knee point. And so adding a second one would give you two knee points and be very difficult to tune.

But, this has me thinking about the '04 Outlander rotors. 11.55" and bolt on for 5-lug DSM. I wonder if they'd fit inside camaro calipers/brackets. The 300zx rotors are 11.02". Is there an extra 1/4" of clearance between the rotor and the caliper? If so, you could be running 11.5" front (close to 20% better dissipation)with the smallest (38.1mm) PBR pistons which would shift the for aft ratio from 2.9 to 2.6 for a brake bias of 72% compared to factory 74% (which is actually significant). Then you get the backs doing more work (they're lazy in stock form) which further relieves the demand up front. I'm into it!



When I look up an 04 outlander on autozone's site it says the front brakes are 276mm, 2wd and 4wd models.

 

[belize1334]

@ Toybreaker... er right. Sorry, my head was on backwards. The bore of the MC gives the effective area to get from pressure to force. For the same force you need less fluid pressure if you have a bigger area. So increasing bore will shorten pedal travel and also decrease fluid pressure. Both good things if you're increasing the caliper piston diameter.

@ 89Mirageman... I guess it's '05,'06 Outlanders. click

 

[BrandonEchols]

Quoting JSchleim18:
3rd Gen Eclipse master cylinder are 1 1/16" bore direct bolt on



Direct replacement for ours?
No bending of lines like with the Q45 unit?
Have you done this mod, or can anyone confirm?
Part number?

 

[RedTwo]

Evo's are the same size (17/16") but they have one extra outlet (for the clutch) that needs to be plug up before you can use it. Straight swap for VR4 unit.

 

[89Mirageman]

Quick update on the Outlander 294mm rotors which I believe are also the same ones that come on the 08+ Lancers. I went to advance and bought one for a mockup with my Ford PBR twin piston calipers. The good news is that they barely clear the inside of my 16 x 8 oem 3000GT wheels. The bad news is that the bracket on the caliper hits the two mounting points on the knuckle. The only way that I see it working is to clock the caliper at a different angle and trim one of the mounting holes on the knuckle and drill a new one a little closer to the center to allow more clearance. I'll run out and take some pics in a bit, maybe you guys can come up with a better idea for me. I really would like to make this work since I have these perfect calipers just laying around.

 

[89Mirageman]

Here are the pics. You can see that the caliper bracket is too big for the 294mm rotor and there is no room to make a mounting bracket.




In this pic you can see that I clocked the knuckle a bit and one ear will clear. I was thinking of trimming the other ear on the sharpie line and drilling a new hole where the dot is. Not sure that I like this idea but it should work. Anybody got a better idea?




Here are some pics of how close the clearance is on my 16" wheel.

 

[curtis]

Ok the reason the Cobra rotors work is because of the depth of the hat. Its not that much my it being thinner this moves the caliper and bracket outward and gives space between the ears on the spindle and the ears on the bracket to offset and mount up with the bracket Ron designed. Maybe you can find a rotor the same dia but with a thinner hat and it will work with a stud in one hole and a bolt for the mounting.

 

[pagosadsm]

I had success with installing Mustang PBR calipers with Crown Vic 12X1.18 rotors.
The rear I fabbed 96 Corvette PBR calipers with 96 Corvette 12X 3/4" rotors. I also have a factory hand brake. I don't have any problems with the balance of the proportion valve.Everthing fits in a 3000gt 16" rims. You can see some photos in my gallery on www.dsmtuners.com. I am pagosa dsm there.
Rick

 

[89Mirageman]

Stumbled across another possible option, I grabbed these 4 piston calipers from an 87 Toyota 4WD pickup. They have two large pistons and two slightly smaller, plus they have the quick change pads. Here they are mocked up with a 276mm rotor from a 92.5-94 AWD DSM. Looks like a simple adapter is all that is needed.

 

[Okayplayer]

That's funny because I stumbled on a set just like these, let me know what you figured out for a mounting solution!

 

[Okayplayer]

Thread from the dead... Have you gotten anywhere with this? I'm looking at this now for a second option instead of the stealth rt brakes. I'm going to start digging on this in a few. More to come...

 

[89Mirageman]

Still haven't messed with them. All you have to do is get a rotor and caliper for mockup, use some mdf board or something to cut a few brackets out of. Get the dimensions right and then transfer it over to mild steel or aluminum plate and you're done.

 

[maxpain]

I installed today to my gf:s evo1 "outlander" front brakes.

Drilled 4 * 114.3 offset bolt holes to brake disks and bended little bit brake disk shield. Then it was bolt on!
I havent tried yet those on track. 15" wheels dont fit anymore with those brakes.I think ff you are installing those on galant you need change brakeline fittings to banjo type.