85Gen1

hey all. so last year before all my turbo mods I had great brakes. now I have none. the pedal pressure is very weak. and when I'm moving I have none. ( other than the ebreak). the vacumn assist is takn out of the car due to my blow through system. I replaced the master cylinder in the car because I thought it was bad but that did no help. I can't find any air in the lines either. last year the car got new pads, rotors and wheel cylinders.someone Please help. I'm in blairsville PA at wyotech for refinishing and I need to get it to class to paint. any info would help. thanks guys

j9fd3s

iTrader: (3)

well if you took the power booster out, isn't that the problem?

85Gen1

possibly. but I thought regardless if I have it or not I would have brakes it would run like older vehicle that didn't have power assisted brakes but I could be wrong in my statement

clykins

iTrader: (1)

I believe that removing the power booster will only remove its assistance meaning the brake pedal will just be more firm, not "very weak".

I would check the proportional bypass.

rxtasy3

iTrader: (2)

that's the whole idea behind "vacuum assist". without it u will have to press much harder on the pedal to stop.

85Gen1

I do understand that but it goes right to the floor. I've tired to pump them while breaking and you cannot feel the difference

Redliner223

iTrader: (6)

As a person without a break booster for a while I can help with this situation.
The break booster has a line leading into is from the engine. when stepping on the brake pedal there is a small metal vacuum connection that opens drawing in air to help force the brake fluid to stop you.
SUPER old cars did not have this technology and were designed to compensate this (Rx7's were designed to have it).
Pump all you want it won't do a thing.

1badFB

iTrader: (1)

Just because you have a turbo doesnt mean you cant use the booster...

This is obviously a problem elsewhere though.


I have been running my drift beater without a booster for years.
Yes, the pedal is stiffer, but it doesnt make the brakes any less effective.

Redliner223

iTrader: (6)

Have you disconnected your vacuum line at all?

85Gen1

ya rats nest is taken out air pump is gone with all the lines