s14 300zx brake conversion need help ?

[rx7ls6]

Well i been trying to find out why my brakes still sink. I have brand new front z32 calipers,new pads,all new rotors around,steel braided lines , new booster from a abs unit. i have changed the master cylinder 3 times and now have a brand new one z32 unit. My pedal still sinks when going to a stop than returns at idle. i have to slam on it and it delays to stop. What is the correct bleeding seqeunce to this conversion anyone please let me know thanks.

also this is no leaks anywhere fluid always stays the same and alos tefloned all thread to insure no leaks. Will not bleeding in the correct sequence cause this?

[compactfean]

First off I'm not trying to dog anyone but there are too many people that do this swap and put the calipers on backwards (wrong side) witch puts the bleeder at the bottom. You will never be able to bleed the brakes properly because the air always rises to the top of the caliper. If your caliper is correctly installed your other issue is the abs. On a lot of abs systems if the pedal goes to the floor when bleeding The abs won't work properly because its sensing a broken line. If either one of those bleeding procedures don't work get the self bleeders from your local csk or autozone or whatever.

[compactfean]

Also when bleeding, always bleed furthest caliper to closest from the master cylinder.. So for our Nissan's I will go passenger rear, driver rear, passenger front,driver front.

[rx7ls6]

i have no abs and the bleeders are on top. i bled them a couple of time and on the last bled the pedal wasnt as firm

[rx7ls6]

does it matter with wheels on or off

[allenms240]

No.

[compactfean]

Well the only thing I can think of is do a gravity bleed. If that doesn't work take it to a shop with a brake flush machine. I have worked at many shops that have these and I swear it is impossible to get any air in the system. Or just buy the self bleeders.

i have no abs and the bleeders are on top. i bled them a couple of time and on the last bled the pedal wasnt as firm

[compactfean]

It sounds like the only thing you haven't messed with is the power brake booster. Is it good?

[rx7ls6]

i have changed the booster out but with a old junk yard one not sure if its any good though. i put it when its off and it holds hard. it siks when i turn the car on liek it should i just feel to much pedal effort is needed to stop. it doesnt sink to the floor anymore or at least not as much. i drove it down the street and it locks the wheels up when i slam on it but the pedal feels hard to to push. could it be a boost or do i need to brake in the new rotors and pads

[compactfean]

I would brake in the pads, fyi your supposed to take it easy on new brakes for the 1st 500 miles. Also I've heard if you don't upgrade to the z32 in the rear you have to use some bad a** pads in the back and possibly better rotors to help with the fronts locking up. Besides using z32 master cylinder which you've already done.

[rx7ls6]

im using cross drilled rotors in the front and rear. maybe i need to brake in the pads also but im getting a new booster jsut incase its the only thing i havent upgraded thanks

[compactfean]

Well Keep us posted cuz. I'm about to do the same swap.

[upsdude]

take your booster to a brake shop and have them test it. i pulled 2 z32 booster from the junkyard and it turned out one of them was bad and had to be rebuilt...but you wouldn't be able to tell from just looking.