AE86 proportional valves (brakes n shizno)

[rthy]

So thats the spring from the bottom of the adm pv that goes to the rear brakes?

[Hen may possibly be a nut]

I can't remember, it was years ago. Bottom rings a bell, but I just pulled it apart and investigated.

Hen

[rthy]

kool thanks, will check it out tomorrow

[rthy]

ok took apart the adm pv and jdm rear pv


ADM PV (rear side), spring, piston, spring seat and nut

in side the rear half of the adm pv


JDM rear pv, spring, piston, spring seat and nut

inside the rear jdm pv


so it looks like some fluid from the front half of the adm pv goes to the rear as well.
so not sure how removing the rear sping will help?

ADM PV (front), spring and nut


inside the front half of the adm pv

(note the thing in the middle is not a hole)

was thinking of a way to block fluid from the front half going to the rear, maybe cutting it someplace and welding that hole

[rthy]

This is how i think the PV is working

since the jdm disk is a 2piece the additional passage for more fluid to the rear isnt required.
so maybe cutting and welding up the hole will be the pov workaround to get the rear disks working the way they should?

[LittleRedSpirit]

I found some terrific links while researching some brake concepts a while back. Here they are. They have some sort of explanations about proportioning valves in there I believe.

[rthy]

thanks, but im looking for into on the ae86 pv's
i would buy the jdm front half pv but they are no longer available from toyota (or so says the parts guy at essendon toyota)

[LittleRedSpirit]

Yeah you're right, fuck learning anything, its much easier to put your bib on, open your mouth, and here comes the aeroplane. Just hang around until Johnny Rochester shows up and tells you everything.

Ill spare you the 10 or so explanatory links I just found then, since you're not willing to read shit.

What a waste of 15 minutes.

[rthy]

i already have read up on how shit works along time ago before asking this questions

i guess what im really after is the factory specs of the adm and jdm PV

Not all PV's are the same, and the ae86 came with a few different designs for drums and disk brakes.
As we all know the drums require more fluid as they use wheel cylinders.

So how does this ADM PV put more pressure to the rear wheel cylinders?
As mentioned above, there is an additional passage from the top part (that controls the front brakes) of the ADM PV connects to rear half of the PV.
By eliminating this extra pressure from the front half, will this reduce the pressure to the rear brakes to act like a factory disk end? i assume so?
i dont think removing the spring from the rear half of the adm PV will work, as it will allow more pressure to the rear?

OR are the JDM and ADM Master cylinders also different?
as for the removing the spring from the master cylinder on the rear half so less pressue is applied to the rear, that seems to work but not correctly.
as the pressure to the rear is being applied via that additional passage and not the proportional section of the rear half of the adm pv. i assume so too?

so removing a spring doesnt seem logical, unless proven.


Also: anyone got pics of the front section of the JDM PV or part number?
JDM Rear Prop Vavle: T47150-22050

[n00bvak]

This seems like a lot of screwing around when an adjustable PV only costs $70 and bending a bit of bundy around a screwdriver.

It does the same as all the stuff you are trying to workout here, its lighter and fully adjustable for those sick burnouts with the rear lines locked .


Especially if you may get on in the future