Rear disc swap issues

[Dmf274]

So basically put a brake bias valve in or go bigger with front brakes

 

[Supercharged111]

So basically put a brake bias valve in or go bigger with front brakes

I'd start with the free solution of swapping front and rear calipers.

 

[Dmf274]

I will try that and get back to you guys thanks for the help/input much appreciated

 

[Malibu795]

D154 in and of itself could mean more than 1 thing. For example:

Wilwood Disc Brakes - D154 Front Caliper Kit

Wilwood bolt-on front brake conversion kits are designed to provide superior braking performance and a highly detailed appearance over a wide range of domestic and import applications. D154 Front Caliper Kit

www.wilwood.com

If the stock caliper piston was 2.5" then a stock piston has an area of 4.9 sq/in. OP replaced that with calipers with an area of 4.12 sq/in and thus downgraded.

Not necessarily, also have to factor in area of the pad engagement into the equation.
Basically 1 point of contact vs 2/3/4etc per pad which gives a more even pad force.

Definitely try swapping calipers front to rear.

Next step would be bias valve, after that might find some 12" disc up front.. common is C5 12.9(13") fronts which need 17"

 

[Streetbu]

Even in a properly working system, those are not the correct size calipers to use on the rear. This has been discussed at length on multiple forums.
Long story short, no matter what you do, it won't function the way you want it to 100%

 

[Dmf274]

Swapped the calipers it was better but still locks rears on hard braking swapped the masters again and it was the same. Looks like the valve is the way to go until I can afford a better front upgrade or look for smaller rear rotors?