Brake balance controller/adjustment

[MarkCup]

Anyone have any experience of these?

Can one be fitted to a 172 Cup?

Id be looking for adjustment NS to OS on the fronts only...

 

[Friction]

why would you be looking for adjustment across an axle?

 

[MarkM]

Brake balance adjustment is used to adjust a % of the brake force front to rear or vice versa. Used in racing applications if the driver was locking the fronts he would adjust more to the rear.

To adjust across front wheels would be very dangerous the car would pull under braking to which ever side had the most braking force

 

[16v_jon]

bias valve under the car near the rear swingarm get a pro to adjust it as it can be dangerous

 

[Fred@BTM]

Quote: Originally posted by 16v_jon on 14 August 2005
bias valve under the car near the rear swingarm get a pro to adjust it as it can be dangerous

thats the headlight adjuster dude (for the auto leveling xenons)

AFAIK RSclios dont have a bias valve

 

[16v_jon]

if cups dont have a bias valve how do the brakes work on a split as they dont have abs

 

[Fred@BTM]

its either controlled from the master cylinder or i guess there must be some kind of inline valve somewhere, ill have a look at yozzas cup on monday and report back!!!

TBH i havent got a clue, but the crappy little thingy on the rear beam is for the headlights (cups dont have it)

 

[EVOgone]

Quote: Originally posted by Fred2001Dynamic on 14 August 2005

its either controlled from the master cylinder or i guess there must be some kind of inline valve somewhere, ill have a look at yozzas cup on monday and report back!!!

TBH i havent got a clue, but the crappy little thingy on the rear beam is for the headlights (cups dont have it)

Be careful with it in the wet..

 

[Fred@BTM]

ba dum dum tish!!! funny chap

 

[BenR]

Quote: Originally posted by 16v_jon on 14 August 2005

if cups dont have a bias valve how do the brakes work on a split as they dont have abs

its set and left.

 

[MarkCup]

Why do I want/need adjustment across the front axle?

My car runs empty i.e. no sh*t in it at all, all the time, the back is stripped out, and its rare that I drive with a passenger.

When braking hard solo, I consistently get the front left locking, way before the right does. When two up, they both lock together.

So Im working on the basis that having just me (75kgs) on one side of the car is unbalancing it when it comes to maximum braking force on the front axle.

This became apparent two days ago when some 90yr old with a death wish in a Morris 1000 pulled out in front of me after some rain. I pulled up in good time, but it was cadence braking that saved me as the front left kept locking over and over again. If they were properly balanced Id have been able to apply heavier pressure as both tyres would be working as hard as each other...wouldnt I?

So Id like to be able to adjust the balance depending on if its just me, or me +1.

Possible? Not possible? No-ones done this then?

 

[Fred@BTM]

thats what corner weighting is for chap

what pressures you running???
what suspension??

 

[MarkCup]

Corner weighting? Anyone have a set of corner scales?

So I need take 37kgs from the right side of the car...and move it to the passenger footwell? Or is that a bit simplistic?

Standard suspension, 539s (as always), 29F/33R...

 

[Tom]

but the clio has over 600kg over the front end anyway?

You being on your own should not affect braking at all, id say theres more something wrong with your car/brakes than with the cups std brake setup.

 

[Fred@BTM]

ok standard suspension aint helping

tyre pressures would be the easier way to sort it

front left 30psi, front right 32psi

rears both at 28psi

experiment a bit

 

[Fred@BTM]

also is tracking correct???? are the brakes (discs and pads) wearing the same???

 

[MarkCup]

Quote: Originally posted by Tom on 15 August 2005


but the clio has over 600kg over the front end anyway?

You being on your own should not affect braking at all, id say theres more something wrong with your car/brakes than with the cups std brake setup.

I look at it this way...

Weight distribution is approx. 65% front / 35% rear
Total weight is approx 1,000 kgs - so thats 650kg on the front...

...or 325kgs each side unladen.

Stick me in the drivers seat and you get NS 325kgs / OS 400kgs - that would explain why it locks NSF when solo, but doesnt two-up...wouldnt it? I mean, the OS tyre has nearly 25% more mass bearing down onto it.

The above assumes that the car is even NS/OS when static, and I know that the F/R split will change under braking as weight transfers from rear to front, but how could you work that into these figures?



[Edited by MarkCup on 15 August 2005 at 4:39pm]

Yup, tracking is OK, and discs pads are wearing evenly.

 

[Fred@BTM]

ah ha, but which side of the car does the engine sit on???

 

[MarkCup]

^^^ errr...OS?

Not really getting anywhere with this am I LOL

Am I resigned to having to take 3 crates of beer with me to each trackday, so that I can stuff them in my passenger footwell to get the corner weights right?

TBH, Im so comfortable/dialled into my tyre pressures et al, that I wouldnt want to start altering them.

 

[Tom]

Battery in the boot job.

 

[MarkCup]

Its already where Id need it though...NSF...

I think Ill give up on this...

 

[Tom]

LHD?

 

[blink172]

Bag of cement in the footwell?

 

[MarkCup]

Cant heel & toe comfortably from the passengers side

 

[Fred@BTM]

without playing with suspension, tyre pressure is the only way to counter act