Brake master cylinder differences - Current thread? (1 Viewer)

[Pin_Head]

I know it is counter intuitive, but a larger diameter master delivers more volume, but at a lower hydraulic pressure for the same amount of foot pressure. If your pedal travel is too long or if your brakes are too sensitive, then you may want a larger diameter master. If you need more pressure, get a smaller diameter master.

 

[Broski]

Most NA 93-94 have 4 wheel disk and ABS, some have rear drum and no ABS.

OK I am no expert but it makes since the 93's were the change year but go back to drum in 94 ?

 

[maxamillion2345]

Yeah. Everyone says for tons, in my case the giant chevy d60 single piston calipers and 14b drum brakes, that 1 1/4 chevy masters are perfect but I could not get the brakes to really stop. Stepping down to the 1 1/8 master worked perfect.

 

[Dynosoar]

15/16" master gives a perfect feel to a 60 with 4runner calipers.......Just sayin

Dyno

 

[nukegoat]

I'm running a 1 1/8 dodge w250 master with a skys off road adapter. I had to do some hole enlarging but everything else bolted up. That and you'd need adapters from m10x1.0 to the standard flare nuts it uses. Although, now I'm thinking of it, I'm not sure if it'd there'd be interference with the Toyota drivetrain or not. It's reservoir is much larger but I have a 6bt in place of OEM so dunno. For me, with tons, the 1 1/4 chevies were too big, I did not try a t100 1 1/16 but the 1" FJ master was too little. The 1 1/8 worked perfect. I could not get the 1 1/4 to lock up the brakes at all. 1.375 is hugeeeee Anyway... hope that helps some...

It does, thx. The rear discs and calipers I have are the 2007ish 2500hd style. Big pistons

 

[nukegoat]

Are you running oversized calipers? If not, the bigger master would make pedal way more sensative

Yes

 

[Douglas S]

Yes

Hydroboost and be done with it. Lots of sizes to choose from.

 

[nukegoat]

Hydroboost and be done with it. Lots of sizes to choose from.

Wouldnt I need to run another power steering pump or something?

 

[Tools R Us]

OK I am no expert but it makes since the 93's were the change year but go back to drum in 94 ?

IIRC, ABS was an option till '94.

 

[Tools R Us]

Wouldnt I need to run another power steering pump or something?

Upgrade to a Saginaw setup, attached to the chevy motor upgrade?

 

[nukegoat]

Upgrade to a Saginaw setup, attached to the chevy motor upgrade?

I see now. Good thinking and it also takes care of the head gasket worries

 

[Douglas S]

Wouldnt I need to run another power steering pump or something?

No. Hydroboost is used in many applications that have only one pump.

 

[nukegoat]

No. Hydroboost is used in many applications that have only one pump.

But with more output than the stock pump i assume? I am hanging hydro assist off it already and it isnt great

 

[jaymar]

But with more output than the stock pump i assume? I am hanging hydro assist off it already and it isnt great

Hydroboost not compatible with ABS; I wouldn't do it. It may work, or seem to, but... On top of potential safety issues, it may give an insurer reason to deny a claim, and anyone you hit reason to say you were at fault.

 

[jynx]

Ok, back to brake MCs, is the 93-94 non-ABS MC bigger than the 91-92 MC? Going to swap FF rear into a 92 and will be swapping to later FZJ front calipers as well. Need to make sure the MC is up to the new loading.

 

[cruiseroutfit]

Updated some info and added a few pics

 

[cruiseroutfit]

Updated the top post with an additional application. We're up to 11 OE variants for the 8x Series Master Cylinder, I have most here and will soon have one of each to compare side by side.

 

[Tapage]

Wouldnt I need to run another power steering pump or something?

I did have to do it in Tencha .. but Tencha PS pump was old and tired .. I also have ram assist to count that ..

 

[Stoshu]

Ok, back to brake MCs, is the 93-94 non-ABS MC bigger than the 91-92 MC? Going to swap FF rear into a 92 and will be swapping to later FZJ front calipers as well. Need to make sure the MC is up to the new loading.

I am in the same boat. I'm about to swap in factory 1996 FZJ80 ABS locker axles with discs front and rear into a 1991 FJ80 that came with disc front and drum rear - non ABS.

My questions is if the non - ABS master will properly support the disc/disc configuration, especially with the larger discs up front from the 1996 axles?

Thanks for any insight!

 

[cruiseroutfit]

I am in the same boat. I'm about to swap in factory 1996 FZJ80 ABS locker axles with discs front and rear into a 1991 FJ80 that came with disc front and drum rear - non ABS.

My questions is if the non - ABS master will properly support the disc/disc configuration, especially with the larger discs up front from the 1996 axles?

Thanks for any insight!

No, you will want to go with a disc/disc master that does not have a residual valve for the rear drums, our BKN60570N for example would be a great choice.