Master Cylinder upgrade?

[ToyFamily]

I have the FJ80 MC,V6 booster...FJ 60 Rotors,V6 calipers.

Nick

[YotaFun]

I have the FJ80 MC,V6 booster...FJ 60 Rotors,V6 calipers.

Nick

is that MC in your current 3rd Gen runner pictured?

[DHC6twinotter]

Found this thread over on pirate that may help:

http://www.pirate4x4.com/forum/showthread.php?t=251887

[DHC6twinotter]

We have a spell check? When did that happen?

This is a good thread. My brakes haven't been that good, so maybe it's time to upgrade the MS. Going to slap on some rotors and pads first though.

[ToyFamily]

I have the FJ80 MC,V6 booster...FJ 60 Rotors,V6 calipers.

Nick

is that MC in your current 3rd Gen runner pictured?

No, though it needs some upgrades because the 3rd. gen 4runner brakes suck...at least on a 3rd gen. For that 4Runner I was looking into Tundra braking parts which the calipers are a bolt on upgrade..

The setup I described is on this with 37's and Tacoma TRD rear end...still not on the road yet
[img width=800 height=533]http://i457.photobucket.com/albums/qq300/toyfamily2/IMG_1957.jpg[/img]
But I had the FJ 80 MC on this which I DD'd for 3yrs. with 35's, the stock 85 booster, stock 85 rotors and a V6 rear end and I was happy with it.



Nick

[corax]

Here's the one I decided to go with - new for $50 w/ free shipping from ebay


and the supposed cross reference:

Brake Master Cylinder for the following 1 TON Models:

1994 Toyota T100 Pickup : 4-2694 2.7L DOHC
1994 Toyota T100 Pickup : V6-2958 3.0L SOHC
1995 Toyota T100 Pickup : 4-2694 2.7L DOHC - Notes: w/o ABS
1995 Toyota T100 Pickup : V6-3378 3.4L DOHC - Notes: w/o ABS
1996 Toyota T100 Pickup : 4-2694 2.7L DOHC - Notes: w/o ABS
1996 Toyota T100 Pickup : V6-3378 3.4L DOHC - Notes: w/o ABS
1997 Toyota T100 Pickup : 4-2694 2.7L DOHC - Notes: w/o ABS
1997 Toyota T100 Pickup : V6-3378 3.4L DOHC - Notes: w/o ABS
1998 Toyota T100 Pickup : 4-2694 2.7L DOHC - Notes: w/o ABS
1998 Toyota T100 Pickup : V6-3378 3.4L DOHC - Notes: w/o ABS

[CJM]

Let us know how it turns out!

[corax]

time to upgrade the Master Cylinder in preparation for my T100 caliper swap - the bigger pistons on the T100 calipers need a slightly bigger MC bore. The '90s T100 1 tons have a 1-1/16" MC bore vs the popular 1" bore found in many mid 90's 4runners and LandCruisers - bigger isn't necessarily better when it comes to the MC bore. A bigger bore moves more fluid, but produces less hydraulic pressure with the same amount of force on the pedal. In this case, I wanted to match what was available on the T100.

here's my $50 ebay master cylinder, brand new - note the 1-1/16" cast on the side

out with the old 7/8" bore MC

in with the new (and the aluminum looks much prettier than rust )


it was a simple bolt on swap, no drama. The front brake line needed to be bent a bit to match up with the T100 MC port. I didn't bother to bench bleed it, prefering to do it on the vehicle with a rag under the lines. Initial driving impressions are good with pressure building and the pedal firm very near the top of it's travel, though when I get the T100 calipers on it should soften up a bit. I would not recommend this size MC with the stock 1st gen calipers as it could get tiring to drive with the extra firm pedal. On a 2nd gen with the "S13WB" calipers though, it might be a nice upgrade that would give a better pedal feel.

[slosurfer]

Keith, we already have S13WB's and I believe that same size MC.

[corax]

What level/brand DOT fluid did you choose? I almost pulled for the cool blue ATE DOT4. I still may goto stainless lines.

I just went with DOT3, but I flush it out every 1-2 years to prevent any boiling from moisture absorption (hygroscopic action)

Keith, we already have S13WB's and I believe that same size MC.

Yeah, you already have the calipers, but your OEM master cylinder should be the 1"
bore
From napaonline.com, using a 3.0 '93 4runner:
Attributes:
Features & Benefits:100% OE Quality New Seals Are Installed On Every Unit. OE Performance And Reliability.
# of Line Ports:2
Brake Cylinder Bore Size:1.00000
Finish:Rust-preventative Finish.
Line Thread Size:M10-1.0
m10-1.0