Ok so I'd like to upgrade my brake calipers to a 2 piston caliper and don't know what my options are. I'd like to do this using the original brake rotors if at all possible since I just ordered a pair of C-Tek sport drilled/slotted rotors which are 21-22mm thick. I've done a little bit of research and found that possibly the caliper from a Land Crusier or maybe even the V-6 pickup or 4-Runner would work. I kinda think the camper had a 2 piston that might fit as well or the 4x4 pickup caliper!

 

I had planned to upgrade my calipers too until I swapped in a V6 4x4 1" master cylinder and double diaphragm booster with stainless braided lines. I have more than enough stopping power than the light little truck could ever need. I have a tendency to lock the fronts up a bit on the auto x course.

 

To prevent the rear lock up throw a adjustable proportioning valve in to the mix!

 

Yup! I haven't installed mine yet but I have an LSPV so I flipped the axle end of the arm over so I have a bit less braking until I get off my ass and do it right.

 

So you just swapped out the master cylinder and booster but kept your original single piston calipers? Was the booster also from the V6 4x4?

 

Is the booster necessary or can just the master be used? I already have power brakes in mine.

Also what years did the master come from?

 

On a quick glance at o Reilly's website it looks like the flange is potentially the same so just the master would work.

Our stock 2wd masters have a .817" bore and the 91 4wd I looked up is 1". $78.99
If you buy new you'll need to get a complete one with reservoir as that style looks slightly different.

I'll have to check the yard. They have lots of 4runners there

 

Yes the booster is also from a V6. If you only swap the master the pedal will be very hard since you are now pushing more fluid with the same boost pressure. The matching booster is a requirement.

 

Ah good to know! Does it all fit in there nicely?

 

On 89+ its a direct bolt on. Pre 89 you will have to tweak the edge of the booster a touch to clear the steering shaft.

Depending on model of master cylinder you may have to bend the brake lines.

 

Sounds easy enough. I'd be getting one from a 2nd gen 4runner.

So I've been thinking about this and I have to ask. Did you ever try the bigger master with the 2wd booster? Cause theory of hydraulics/leverage would prove that a larger bore on the master would require less pedal effort to move the same sized slave pistons. Even without power brakes it should be easier with the bigger one. In theory. I'm not trying to argue and I realize in practice things end up different sometimes but it had me wondering.

 

You are thinking 100% backwards. A larger master with a small booster would make the pedal very hard almost as if the booster isn't there at all.

A smaller master requires less effort to push but it also pushes less fluid. The bigger booster with the stock 13/16" master would make the brakes very touchy but they'd work well enough.

Using a larger master and booster together keeps the brake effort stock feeling but with a short pedal travel.

 

I thought there was a way to run Nissan calipers on the 4th gen?

 

Fair enough! Thanks for the thoughts. I have just added this mod to my list.