ABS Delete

[Thunderstruck95]

My 95 Thunderbird has factory ABS and I want to remove the system to lose weight and simplify things. My master cylinder has two lines coming off it and a hose bringing fluid down to the pump.
Can I simply put T's on both lines and find a suitable plug for the fluid line? (I would plan on using the factory pressure regulators/ restrictors that are behind the drivers tire and run to the back)
Is there a pressure switch anywhere that is needed to run taillights or signal the EEC?

 

[theterminator93]

I know someone else out there will chime in with more details, but IIRC you need the non-ABS master cylinder and the correct proportioning valve to do the setup properly. The brake on/off switch at the top of the pedal is already set up for the taillights and cruise control deactivation.

 

[Grog6]

The inline devices in the drivers wheelwell are 'residual pressure valves.' They would keep the master from draining out a wheel line if there was a break in the line. The proportioning valve is the block at the drivers' front frame rail. The brakes are split rt front, and left rear on the primary master section, and the other two are the secondary master; primary is toward the booster, sec is at the end of the master.

 

[XR7-4.6]

You don't need to change the master cylinder, but you do need to either change the reservior to the non-abs type or add a plug to the bottom to block off the pump return. I'm doing the same thing but I'm using the OEM proportioning valve in front of the battery.

 

[supergordo]

I'd find a donor car at the junkyard. Get the proportioning valve and the lines you need. Then it would be straightforward.

 

[Zep5.0]

Are non ABS cars all the same 89-97? What about rear drum vs disk?

 

[Grog6]

The proportioning valves would be different. Drum cylinders move more volume of fluid, at lower pressure.

 

[XR7-4.6]

Are non ABS cars all the same 89-97? What about rear drum vs disk?

Drum vs disc has a different proportioning valve. V6 vs V8 after 1993 had 4 port vs 2 port master cylinders, up to 96, after that they all used 2 port masters.

Edit: Oh and the 4 porters didn't use the same proportioning valve as the 2 porters, they were right off the master cylinder rather than remote like on ABS cars with them at the wheelwell fittings and 2 porters with it in front of the battery

IIRC

An ABS 93+ can be directly converted no non ABS just swapping the V8 engine compartment lines(two from master to prop valve, two from prop valve to each front caliper, two from prop valve to rear lines at the fittings in the wheelwell) and adding the proportioning valve ideally from a 96-97 rear disc car. That's what I'm doing and @supergordo is suggesting.

4 port V6 non-ABS




2 port V8 non-ABS




2 port prop valve



And this is what you’d need to convert a ABS system to non-ABS using factory components(minus the springs lol)

 

[Kenz]

Are the non ABS V8 parts hard to come by? I was looking for a 2 port non ABS master few years ago because I thought mine was bad, but it ended up being something else. I couldn't find one either new or rebuild.

 

[Thunderstruck95]

Thanks for all the info guys.
I just ordered a non ABS prop valve setup from TBSC. I’ll try making my own lines and plugging my existing master cylinder reservoir.

 

[XR7-4.6]

Are the non ABS V8 parts hard to come by? I was looking for a 2 port non ABS master few years ago because I thought mine was bad, but it ended up being something else. I couldn't find one either new or rebuild.

The two port masters are the same regardless of ABS, the 4 port ones use a 1" bore, 2 port are 1-1/16" The only real difference between the ABS ones is the reservoir which just swaps over

 

[Chandar8]

The two port masters are the same regardless of ABS, the 4 port ones use a 1" bore, 2 port are 1-1/16" The only real difference between the ABS ones is the reservoir which just swaps over

Necro time! So if I have abs can I just plug the reservoir return and take out the rest of the ABS as long as i have the 2 port? Do you happen to have a maintenance diagram that I could take a look at? I just haven't seen enough to wholly understand what I'm looking at, and for.

 

[XR7-4.6]

Necro time! So if I have abs can I just plug the reservoir return and take out the rest of the ABS as long as i have the 2 port? Do you happen to have a maintenance diagram that I could take a look at? I just haven't seen enough to wholly understand what I'm looking at, and for.

You can but if you’re using the rest of the lines and metering block from a doner MN12 just grab the reservoir too and take away a potential leak point IMO. The reservoir aspect is by far the least of the conversion.

My diagrams are in my head, sorry

 

[Chandar8]

You can but if you’re using the rest of the lines and metering block from a doner MN12 just grab the reservoir too and take away a potential leak point IMO. The reservoir aspect is by far the least of the conversion.

My diagrams are in my head, sorry

Yeah unfortunately there really isn't many donor cars here last I've looked so I'm trying to grab a bunch of soft brake line they use in the trophy trucks and whatnot to build a system lol

 

[Grog6]

Runs fine with my ecu, havent driven yet, trying to get the dumb ass block plate to stop rubbing on the flywheel. OD light flashing, all ive noticed so far.

Yeah unfortunately there really isn't many donor cars here last I've looked so I'm trying to grab a bunch of soft brake line they use in the trophy trucks and whatnot to build a system lol

You need to buy a roll of nickel copper metal hard line, and use that to make a set. rubber line will fail randomly during a panic stop. Please don't run over kids because you can't stop.

 

[Chandar8]

You need to buy a roll of nickel copper metal hard line, and use that to make a set. rubber line will fail randomly during a panic stop. Please don't run over kids because you can't stop.

It's hydraulic line used in trophy trucks rated for 3000psi no bulge. If it works for race trucks it'll work for me