Load Sensing Proportioning Valve upgrade

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Load Sensing Proportioning Valve upgrade

Postby Alby on Tue, 11 Sep 2012 6:43 +0000

I have been trying a few different brake components over the last few years and tried a new setup about 1000 k's ago that seems to be the best so far
I have been running DBA slotted rotors for about 18 months with genuine pads, and have tried Bendix standard 4wd, HD 4 WD and lastly their Ultimate pads. Out of the the three the 4wd was probably the better ones

Anyway I was due for a replacement so have fitted the new DBA 5000? PawPrint rotors but have tried a new pad from the USA called Akabono which my mechanic has been trailing on half a dozen vehicles and getting good results.
The peddle feel is by far the best I have had, I am experiencing no brake fade, they work just as well cold (something the HD 4WD pads were bad for, they need a lot of heat to work) and minimal brake dust (ultimate pads are very dusty and sometimes squeal)
The supplier that my mechanic gets his brake parts through told him about a valve body upgrade that they have been doing to the LSPV that makes it more sensitive so activates better, cost was less than $100 so I thought I would give it a go.
I am not sure what they do but I had to send my valve to them for modification, I think they may drill out the valve port to increase the flow but I am only guessing
Anyway I am very happy the the outcome, I am not sure how much credit I should be giving to the valve body upgrade but I do feel like my rears are carrying more load now than previously ,(my rear was not touched apart from being cleaned and adjusted) and my peddle feel is great
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Re: Load Sensing Proportioning Valve upgrade

Postby StevenS on Tue, 11 Sep 2012 7:06 +0000

Sounds promising but more specific information would be great
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Re: Load Sensing Proportioning Valve upgrade

Postby Rocket55 on Tue, 11 Sep 2012 7:16 +0000

Nice stuff Alby. So many combinations. Keen to hear if you still like the set up after a couple of thousand kms when everything has settled down.

Have you already adjusted your load valve arm up to the top of the threaded bar and then given your load valve arm the big bend?
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Re: Load Sensing Proportioning Valve upgrade

Postby Alby on Tue, 11 Sep 2012 7:24 +0000

I have not bent my arm just extended it as far as it would go
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Re: Load Sensing Proportioning Valve upgrade

Postby Rocket55 on Tue, 11 Sep 2012 7:38 +0000

Ok. Keen to see how it settles in. DBA5000, some horny gear for a Hilux? :D
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Re: Load Sensing Proportioning Valve upgrade

Postby WinM70 on Wed, 12 Sep 2012 4:33 +0000

Keen to hear more also. I extended my LSPV arm by 50mm after I had the lift put in and keep the rears adjusted. I drove a mate's '08 SR5 dual cab with nothing on the back running 32" KM2s and the brakes were nearly non-existent :shock:


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Re: Load Sensing Proportioning Valve upgrade

Postby Jack S on Wed, 12 Sep 2012 4:44 +0000

Any one got a photo of what they have done to there LPV arm and how/what they have actually moved?
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Re: Load Sensing Proportioning Valve upgrade

Postby WinM70 on Wed, 12 Sep 2012 4:59 +0000

i'll put a pic up tomorrow, I can't remember the thread size but I found a coupling nut to suit aswell as a 3" long bolt of the same thread, screwed it all together and raised the arm up 40 odd mm to match the OME lift.
Got one here, excuse the huge photo, photobucket won't let me resize the last three photos I've uploaded for some reason :roll:

Image

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Re: Load Sensing Proportioning Valve upgrade

Postby Alby on Wed, 12 Sep 2012 5:48 +0000

I will get some more details on Friday and post them up

Rocket the 5000 are not much dearer than the slotted so thought why not.

Am heading off to the Simpson next week so will chalk up another 6000 odd k so will report back after that
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Re: Load Sensing Proportioning Valve upgrade

Postby Jack S on Wed, 12 Sep 2012 6:06 +0000

So the height of the lift is the ammount your suppose to move up on this thread?
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Re: Load Sensing Proportioning Valve upgrade

Postby WinM70 on Wed, 12 Sep 2012 6:22 +0000

Jack S wrote:So the height of the lift is the ammount your suppose to move up on this thread?

Pretty much. The valve is bolted to the chassis and the rod is bolted to the diff. By lifting the car you're basically activating the valve reducing braking preassure to the rear brakes.



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Re: Load Sensing Proportioning Valve upgrade

Postby Earl-mi on Thu, 13 Sep 2012 9:38 +0000

The thread is m8. I welded on a new length 100mm long of 8mm rod.

I jacked up the rear axle with stands underneath and started the engine let the clutch out all the way in second gear. Full brakes and there was nothing. I just adjusted the nuts and raised the arm about 50mm up the thread until I had a good pedal feel then went for a drive a thousand times better. I had brake then. Haha

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Re: Load Sensing Proportioning Valve upgrade

Postby Swinny on Thu, 13 Sep 2012 12:15 +0000

you can get a full rod that is extended from snakeracing fitted one aswell..
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Re: Load Sensing Proportioning Valve upgrade

Postby 06lux on Thu, 13 Sep 2012 12:52 +0000

Did any of you roughly measure what it was at standard height. Going to check mine later and I just want a base to start from as I'm not sure if the mechanic would of adjusted it or not.
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Re: Load Sensing Proportioning Valve upgrade

Postby WinM70 on Thu, 13 Sep 2012 3:09 +0000

Earl-mi wrote:The thread is m8. I welded on a new length 100mm long of 8mm rod.

Nice, I had a feeling it was but for some reason wasn't sure.
Sorry about the thread hijack, Alby. :oops:


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Re: Load Sensing Proportioning Valve upgrade

Postby Alby on Thu, 13 Sep 2012 4:06 +0000

WinM70 wrote:Sorry about the thread hijack, Alby. :oops:


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Mate no worries. I was just sharing a bit of info, add what you like, it is all relevant to improving brakes
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Re: Load Sensing Proportioning Valve upgrade

Postby 07luxyTD on Thu, 13 Sep 2012 4:17 +0000

I moved the valve its self down lower on the chassis, the holes are elongated, then wound the arm up higher and seemed enough for my lift didnt have to extend it, locks up all 4 wheels on the gravel with, and without a load now :D
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Re: Load Sensing Proportioning Valve upgrade

Postby Loosey on Thu, 13 Sep 2012 4:20 +0000

This should be stickied
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Re: Load Sensing Proportioning Valve upgrade

Postby Jack S on Thu, 13 Sep 2012 6:39 +0000

Yes i moved the vaalve down on the body itself, but i may move the arm up on the thread a fare bit and see how that goes...
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Re: Load Sensing Proportioning Valve upgrade

Postby glide3 on Fri, 14 Sep 2012 5:28 +0000

Does anyone have any idea how someone would go about completely removing the valve and replacing it with constant load one????
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