What front brake setup to go with? Options

[Coomer]

I'm unsure of what brake setup to go with for the front of my car. I'm putting rear discs from a fifth gen. ST184 in the rear, but for the front I have these options:

1. ST185 Single Piston Calipers and 10.9" Rotors - Bigger rotors, but a single piston caliper.

2. ST165 Dual Piston Calipers and 10.0" Rotors - Smaller rotors, but a dual piston caliper.

I've read both ways on this, so I'm not sure which would provide better braking performance...what do you brake gurus suggest?

Oh, by the way, both are pretty much free to me at this point. I'm getting some ST185 single piston calipers and pads and rotors in exchange for some spare parts, and I have stock AT200 rotors which work for the ST165 calipers, and ST165 calipers and pads.

[boosted_K2]

what are the piston diameters? the whole reason for dual piston is for more piston surface area to increase force over the pad (force = pressure * area) by increasing the area you are able to apply more force to a brake pad using the same brake line pressure.

id assume to go with the 185 brakes just because i couldnt see toyota going to a lesser ability brake on a faster and heavier vehicle, to be honest i dont see either being much of a performance gain, id focus more on stainless brake lines and upgraded pads. also see about putting in an adjustable brake bias. if you are going to hodgepodge parts togeather in a braking system you are going to need to have the ability to adjust the bias so they will work in unicen rather than one end or the other locking up before you are using the full ability of the other end.