brake question

[306lx]

i just finished up my 5-lug conversion and drove the car for the first time about an hour ago. I went with front and brakes off a 2000 gt. everything is together and working, but i know something is not right. i used a 94-95 m/c and the 2-3 port conversion with a wilwood prop valve and gutted the stock one. the problem is the pedal is way too hard, its like i dont have enough vacuum for the brakes and the pedal gets hard. i know guys get away with running the stock booster with great results, i dont mind swapping in the larger unit, but i think i have another problem to fix first. any help would be awesome. also, i sure vacuum isnt the problem, because the pedal feels the same at idle or reved-up. thanks!!

 

[dragnazz5.0]

is it always hard or it gets harder the longer you drive it

are the brakes dragging at all?

 

[Mustang5L5]

WHat brakes are out back? Drums or disk?

 

[Shakerhood]

Sounds like you should go for the 93 Cobra Brake Booster.

 

[306lx]

sorry, i re-read my post and i didnt finish my sentence, front and rear brakes are off the 2000 gt, so its disc all around. the 94-95 m/c has a larger bore than the 93 cobra unit so it should work just fine. i know the larger the bore on the m/c the stiffer the pedal is, but its not a matter of a stiff pedal as much as it gets hard and just doesnt stop. thanks for the replies!!

 

[306lx]

the pedal feel is consistant no matter how long the car is driven. the initial touch of the pedal feels normal, then it gets hard and doesnt want to stop. i know upgrading the booster will help, but i dont think that is the problem. i could be wrong though.

 

[Shakerhood]

Sure sounds like the Booster, a 93 Cobra unit will sure cure the stiff pedal. Do you have the adjustable prop valve set correct?