bigger rear disc in rear than front a problem I assume?

newguy said

Only reason four piston calipers was a thought was to account for the rear disc being larger 11.2 rotors on the explorer 8.8.

If I could keep the disc brakes that came on the car, I would, but the extra room in the engine bay the hdk gives me is worth swapping brakes, even if I need to go to 17's, but am asking these questions to see if I can keep the cop wheels

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Yeah again, the number of pistons by itself doesn’t necessarily mean better braking.

Obviously you won’t be able to use the Mopar disks, my point was just that you don’t necessarily need 4 piston brakes with that wheel set up.

And yeah, just because the rear rotor diameter is slightly larger doesn’t mean they’ll have more stopping power either, as it depends on piston size, swept area, etc. And even if the rear did have more stopping power, that’s easily solvable with an adjustable prop valve.

You should definitely get the part numbers on the brake kits you’re considering, Wilwood publishes all their dimensions. And Denny probably knows if any of his customers are running stock Mopar wheels.