Brake Bias Adjuster

[stouty]

Hi all

I have recently gone to hilux calipers, peugot front discs and have used a starion MC. Im looking at putting a brake bias adjuster in so i can dial in my brakes. It is a T-18, i was wondering what is the best to buy? and where i need to run the lines to. Do i just interupt the line running to the rear and put the adjuster in??

Thanks

[Tim.duncan]

i have just bought a wilwood bias valve, seems so be pretty good. keep in mind they have imperial threads so you will need to takle this some how

i spent 60 bucks and got new lines made up with the correct fittings

Yes it just goes in the line that heads to the back brakes, also remove the oem bias valve all to gether.

[Cerby86]

i just had a look at the "tilton" bias adjuster today and i have to say MUCH smaller and VERY MUCH sexier than the wilwood one.
But then it was $167!

[stouty]

i have just bought a wilwood bias valve, seems so be pretty good. keep in mind they have imperial threads so you will need to takle this some how

i spent 60 bucks and got new lines made up with the correct fittings

Yes it just goes in the line that heads to the back brakes, also remove the oem bias valve all to gether.

Im not sure about AE86 oem bias valve but the t-18 one is all joined, so all front lines and rear lines go into it.

Do i just block of the ports that are used for the rear lines and leave the front lines in the oem bias valve?

Looking on ebay can pick up a wilwood for under 100 so will probally go with one of them.

[Andy San]

i just had a look at the "tilton" bias adjuster today and i have to say MUCH smaller and VERY MUCH sexier than the wilwood one.
But then it was $167!

Smaller is not Neccesseraly better when you want to be making small adjustments whilst driving.

I have a willwood adjuster and find it works very well.

[takai]

Yeah, Wilwood one here. Works a treat.

[cracker]

+1 for wilwood

[Cerby86]

yeah im sure the wilwood ones work just as well, i mean its hardly complicated. and size wise the knob is pretty much the same size but its anodized metal rather than plastic by smaller i meant it doesn't stick up as much.

[takai]

Ah, i was thinking you were meaning this type:
http://www.rorty-design.com/images/Tilton_proportioning_valve_01.jpg

But i do see what you mean, the Tilton screw type one is MUCH smaller:
http://www.pegasusautoracing.com/Images/L/TE90-2003.JPG

[Cerby86]

yeah its shorter north to south. the knob is a bit smaller, what i was worried about is the wilwood knob pokes up a fair way and i could see myself hooking it with something and snapping it off :P

[Jonny Rochester]

Im not sure about AE86 oem bias valve but the t-18 one is all joined, so all front lines and rear lines go into it.

Do i just block of the ports that are used for the rear lines and leave the front lines in the oem bias valve?

Looking on ebay can pick up a wilwood for under 100 so will probally go with one of them.


I am fairly certain the the front pipes are not connected to the rear ones in any way on the iron junction block. I got an AE86 one and cut it in half to prove this point.

However the early junction blocks (eg KE30 etc) have a sensor for a warning lamp in them, so there is some connection between front and rear.

[takai]

The AE86 ones definately dont, as for a fair while i was using one as a T-piece after the PBR brass one cracked.

[boh086]

I was once told by a bloke in a fairly well known brake store that the Wilwood bias valves aren't legal for road use in Australia (I'm in Victoria) as they use tapered pipe threads where only the last few threads actually hold the brake line into the bias adjuster. He said that he only used parts that used Metric or AN type threads, like the Tilton/AP bias valves.


Has anyone ever heard of this?

I have not been able to find any legal information about it and I don't really know whether to believe the guy as he probably just wanted to sell the more expensive part. I do understand where he was coming from but just don't whether to believe if its illegal or not.

[Delazy]

I was once told by a bloke in a fairly well known brake store that the Wilwood bias valves aren't legal for road use in Australia (I'm in Victoria) as they use tapered pipe threads where only the last few threads actually hold the brake line into the bias adjuster. He said that he only used parts that used Metric or AN type threads, like the Tilton/AP bias valves.

Has anyone ever heard of this?

I have not been able to find any legal information about it and I don't really know whether to believe the guy as he probably just wanted to sell the more expensive part. I do understand where he was coming from but just don't whether to believe if its illegal or not.

i wouldnt be stressing too much about it...

99.9% of modified cars are illegal one way or another...

if ur car is to the point that it needs a bias adjustor...that fair chance ur car is well beyond being a legal road car anyways...

[Andy San]

I'm pretty sure having adjustable bias is illegal anyway

[boh086]

I'm pretty sure having adjustable bias is illegal anyway

I thought it was only illegal if you could adjust it from the driving position?

[Andy San]

Probably, I'm pretty sure 90% of the rules are debatable anyway

[s14seriesII]

technically anything other than standard parts is illegal, caliper brackets, and all the other aftermarket manufatured stuff is far from legal

[Tim.duncan]

just mount it where no one can see it..... then it will be legal. thats how it works right?

[ke70dave]

"legal" is a grey word

i was under the impression that you couldn't have adjustment from inside the car?

essentially you should only need to adjust it once anyway. unless its a proper racecar and you need to compensate for fuel and tyre wear over 30laps (which i think andy san you race yours?)

[Nic19]

Should I be using a bias adjuster as I'm running vs commo rear calipers on r31 rotors and ajps fc rc7 front setup? I havnt felt it to be bad at all.

[stouty]

Spoke to a Brake Shop yesterday they said put a T piece to join the 3 front lines (one from MC, one from left front, one from right front) run a line from front of MC to Bias Adjuster then to rear brakes. So was what i was thinking but good to actual have it confirmed by the guys who know. Cheers

[Jonny Rochester]

This is wrong. You need to run the line from the rear of the MC to the bias adjuster, then to the rear brakes.

[stouty]

I dont see why though as the rear line (line closest to the fire wall) on the MC connects to the top of the OEM bias valve which is linked to the front breaks and the front line (line closest to the front of car) on the MC connects the bottom section of the OEM bias valve, then a line runs to the rear brakes.

[Jonny Rochester]

Your master cyl is a duel master cylinder. It has 2 outlet ports. One for the front brakes, one for the rear brakes. Typically you use the front outlet for the front brakes, and the rear outlet for the rear brakes.

The front outlet should go to a T piece, then to each front brake left and right.

The rear outlet on the MC should go to the bias valve, then to the rear brakes.

This is how the stock AE86 works.

[stouty]

Ok just checked again mine is in a T-18 and front line goes to rear. Thought the AE86 and T-18 would be the same but yeh there u go.

[s14seriesII]

This is wrong. You need to run the line from the rear of the MC to the bias adjuster, then to the rear brakes.

common mistake.. front of the bmc goes to the rear

[Dom86]

Should I be using a bias adjuster as I'm running vs commo rear calipers on r31 rotors and ajps fc rc7 front setup? I havnt felt it to be bad at all.

If it aint broke don't fix it.
I hope you have tested in all conditions though.
Wet/dry light braking/heavy emergency braking?

Basically if your brakes are gonna lock-up, you want them to lock front and back together, not only rears or only fronts.

[Jonny Rochester]

common mistake.. front of the bmc goes to the rear


On a AE86 or TE72, the front of the bmc goes to the front brakes, via the T piece. The MC even has F and R written on it.

[stouty]

Well on my T-18 front goes to the rear lol. Does anyone know If front goes to front or front goes to rear on a Starion MC?

[Andy San]

They usually have a f and r next to the ports. All the ones I have had in my car so far have.

[stouty]

didnt even think to look for that lol cheers

[n00bvak]

BTW, heaps of this stuff has already been covered. SEARCH and you shal find:

http://www.ae86drivingclub.com.au/forums/showthread.php?t=2759&highlight=brake

This one is about hydro hanbrake setup but proporioning valve covered too
http://www.ae86drivingclub.com.au/forums/showthread.php?t=7141&highlight=brake