6G Celicas Forums

the part number has to be different as you are looking at a RHD designed master cylinder and it mounts on the opposite side compare to ours but

look here

Toyota celica 1997 GT

04493 CYLINDER KIT, BRAKE MASTER
04493‑20270 W(ABS) (09/1993 - 05/1997) 1 $106.54
04493‑2B010 W(ABS) (06/1997 - ) 1 $101.21
04493‑2B020 $106.54


Toyota Celica 1997 GT4

04493 CYLINDER KIT, BRAKE MASTER
04493‑2B020 1 $106.54
04493‑33060 ｱﾘ(ABS) 1 $106.00


so by simple logic we can deduct that if the rebuild kits are the same ( internals ) the brake master cylinders have the same bore / travel / pressure etc etc

Nice one less thing to worry about.. now that this is solved.. when people swap their brakes to gt4 brakes do they change the proportinal valve as well to gt4 PV?

ya dude or an adjustable proportioning valve. If you can find a original gt4 pv then great. But your not going to get the rear brakes so I'm not sure how that will work out.

the links I posted are from 1999 SS-III Celica and 1999 GT4 Celica. Both RHD Cars. I input the parts database from the Japanese Celica.

Toyota Celica 1997 GT4

04493 CYLINDER KIT, BRAKE MASTER
04493‑2B020 1 $106.54
04493‑33060 ｱﾘ(ABS) 1 $106.00

do you have the link to the above info you posted??

This post has been edited by BonzaiCelica: Sep 28, 2011 - 6:54 PM

Can we talk about pv? The pv is just to divide the % of how much fluid it is sending to the front and rear. Idk exactly ho much % the regular gt pv senda to the front and rear. But lets say it sends 75% to the.front and 25% to thr back... The gt4 pv would send more to the front and less to the rear? The gt pv should send the same amount of % as the gt4 pv to the front and rear?? It its the same master cylinder and the pv is just dividing the amount. Of fluid. Do i make sense?

This post has been edited by diegohiga: Sep 28, 2011 - 7:12 PM

Bonzai, I see the info you posted and you are correct on the difference there, but since I have a USDM celica and was installing GT4 parts those are the 2 I compared and found to be the same.


now on to proportioning valve.

the GT4 proportioning valve is a temporary safety measure on MY setup since I'll have rear gt4 system as well, on your front upgraded - stock rear setup it wont be any better than your stock one, an adjustable valve will be needed to fine tune the system.

a proportioning valve doesn't really work controlling the pressure in proportions as the name would imply, what it does it, allows the brake pressure to be at 50 / 50 front and rear on mild loads ) this is good at low loads ) but then on high loads it caps the rear brakes pressure to a set max, thus avoiding the rear tires to lock up before the front.

on a stock car, when you brake there is a point where you will lock your front tires and if you keep applying more pressure eventually your rears will lock as well. to fine tuning your brakes you want to bring this as close as possible but keeping your front locking first ALWAYS, this will maximize the use of all 4 tires / brake pads more evenly and more consistently also improve your braking distance as you will have the traction of 4 tires trying to stop a car instead of your front ones doing most of the work.



some mild read !!!!

just spoke to a guy who's been in the racing/tuning cars for the past 15+ years. He said adjustable proportioning valves are not recommended at all to the average joe. It takes hours of fine tuning to set in the right adjustment for the valve. Just stick with a gt4. He also mentioned to keep my original master brake cylinder and that it should compensate pretty well with the larger calipers and rotors.