jza80 master cyl bore dia?

[ed]

as in title... does anyone know the bore dia?

it is cast onto the thing, but the casting is way underneath and i cant read it. id need a dental mirro to even try and get down there to see... which i will if noone happens to know/find out in an easier fashion...

cheers
ed

[grotty100]

It is either 25.4mm or 26.9mm.
If it is the 16" wheel model then it is definitely 25.4mm.

[ed]

does the TT version/bigger brakes have a 1 1/16" master? interesting

ive only got the smaller wheel/brake package (originally) but have upgraded the calipers etc. seems that the dia of the master is currently insufficient.

was considering boring/resleeving or even going a new master setup altogether, but might sus out the TT master cyl first

[grotty100]

Check out this link.....

http://mkiv.supras.org.nz/specs.htm

The brake section is down near the bottom of the page.

Cheers.

[grotty100]

There is more info on JZA80 brakes, gear ratios, diffs etc here:

http://www.j-garage.com/toyota/supra/a80spec.htm

[Soarer21]

If I recall correctly the 4 piston version has 1 1/8th master cylinder
2 piston version has 1 1/16th

I have a brand new 1 1/16th unit sitting under my desk, ordered accidentally

[ed]

thats different to the above posted data, and i cant find reference to toyota EVER making a 1 1/8" master cyl... biggest is the 1 1/16"

that said, dont let me talk you out of selling me your 1 1/16" item

[Soarer21]

Hrmm, ok. I think maybe I was misled then on the 4 pot master cylinder dimensions

I would need to cross check numbers from a 4 pot equipped jza80 chassis code I have with the master to see.
Not sure you'd like to see the invoice from Toyota for that new master cylinder
I think it was around $400 but I have it with the cylinder at work where I tossed it in disgust to see it was same as I had already.
When I put the JZA80 4 piston/2 piston calipers onto my car I found it had a rather long brake pedal travel. Its possible it was pedal ratio that created it though. I havent seen a JZA80 pedal to compare.

If you desire 1 1/16th master new then Im happy to cut a deal on a cylinder I wont ever be using