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September 19, 2020, 01:08:32 PM

Brake Residual Pressure Valves

This is a discussion for the topic Brake Residual Pressure Valves on the board Beach Buggy Rolling Chassis Help.

Author Topic: Brake Residual Pressure Valves  (Read 629 times)

this user is offline gasaxe

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on: September 18, 2019, 05:20:23 PM
Hi all, any one ever played with these valves. Just wondering if anyone's got any pictures of them fitted, in there braking system.....????


this user is offline PhillipM

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Reply #1 on: September 18, 2019, 05:22:06 PM
Yes, I run them, in my road cars too - mine are plumbed in straight after the master cylinders.
One of them mucky ones. Sorry.


this user is offline gasaxe

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Reply #2 on: September 18, 2019, 05:27:05 PM

cool what psiÖ.. ??? ? hope your going to say 2 psi
Do they give you a better brake pedal with less pedal travel
« Last Edit: September 18, 2019, 05:56:31 PM by gasaxe »


this user is offline apmaman

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Reply #3 on: September 18, 2019, 08:02:16 PM
Are you using Disc brake kit?

Didn't change the "feel" but made the travel much less when I added the valves. The pedal would go to the floor but stop well. It just didn't seem right when comparing to a normal car there isn't that much travel.

Don't have any pics too hand, but I added them as close as I could to the master cylinder.
Arran
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this user is offline Buggybaggy

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Reply #4 on: September 18, 2019, 09:41:51 PM
I was going to fit them, but couldn't find any with the correct fitment.
Ended up running without them and have had no issues without them.


this user is offline PhillipM

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Reply #5 on: September 19, 2019, 04:48:22 AM
Yep, 2psi, they do reduce the pedal travel a little, brakes feel slightly sharper as a result, but the main thing is you don't get as much knock-off and a soft pedal after hard cornering or off roading.
One of them mucky ones. Sorry.


this user is offline Roadrunner

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Reply #6 on: September 19, 2019, 09:10:08 AM
I run discs all round and have a 2psi RPV on the rear circuit.  This means the rears come on slightly quicker.  As that's where all the weight and rubber is, seemed to make sense.


this user is offline PhillipM

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Reply #7 on: September 19, 2019, 02:57:45 PM
Won't really make any difference to that, they're to reduce any slack in the system and help with pad/fluid knockback, but brakeline pressures under braking are so much higher than that - and the circuit being hydraulic means your pressures are balanced as soon as they get over the 2psi - they won't make any difference to the brake bias in practical use.

The only difference you might really feel would be with the car jacked up you'd have slightly more drag on the rear wheels when spinning them by hand.
One of them mucky ones. Sorry.


this user is offline gasaxe

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Reply #8 on: September 19, 2019, 05:53:31 PM
Hi all thanks for the input. I ordered two yesterday and they have come today (great service), but the good lady wife, will not let me play cars today, so will be fitting them tomorrow


this user is offline gasaxe

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Reply #9 on: September 22, 2019, 01:50:23 PM
Fitted pressure valves today and tested . all good, giving me a better brake pedal (less travel)


this user is offline pepsi81

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Reply #10 on: September 22, 2019, 03:25:17 PM

Good you are sorted. Iíve some but never fitted. Did you have any trouble bleeding the system :-\
Paul


this user is offline gasaxe

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Reply #11 on: September 22, 2019, 05:01:36 PM
I had no problems


this user is offline pepsi81

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Reply #12 on: September 22, 2019, 10:19:22 PM

Ok. Ta