24 replies to this topic

[marko1au]

does it matter if you mount the booster 180 degrees from original ........ vacum inlet on the left hand side of the firewall 

 

                      Mark

[Uncle Chop Chop]

As in, mount it upside down?

[marko1au]

yes mount it upside down

[UCSLE]

got the same idea and dont see a problem with it , better for hiding the vacuum line  

 

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[marko1au]

UCSLE ................... i cant see what differance it would make .......... to be sure  to be sure

i have a 1976 lx 4 door ....... was originally 6 cylinder .......... im assuming from factory it woul;d have single brake booster..

 

mark

sorry single diaphram

[dattoman]

Makes no difference to its operation

Just make sure if its a later one with corresponding pedal the angled end bit points down.

[marko1au]

dattoman ........................ thankyou

[marko1au]

how do you work out the difference between a single or dual diaphram brake booster please ........ can i assume a lx four door 6 cylinder from factory would have a stock single diaphram booster

 

 

                  Mark

[Uncle Chop Chop]

The dual one is physically much larger.

[dattoman]

https://www.gmh-tora...dels-and-types/

[marko1au]

dattoman

.......... it is the earlier straight one ....... thankyou for pointing that out 

 

                      Mark

[marko1au]

is there a abs booster that suits .......... finding a vh 329 is like looking for hens teeth ......

 

Mark

[dattoman]

is there a abs booster that suits .......... finding a vh 329 is like looking for hens teeth ......

 

Mark

 

A what ?

[marko1au]

A what ?mmmmmmmmmmmmmmm .......... sorry my bad i thought that abs was a manufacturer but they used to be a brake repair place here in SA

[dattoman]

A what ?mmmmmmmmmmmmmmm .......... sorry my bad i thought that abs was a manufacturer but they used to be a brake repair place here in SA

 

ABS was a manufacturer in SA .. .usually Hydraulics

About 35+ years ago

[claysummers]

Adelaide brake service I thought it was. Supplied after market replacement master cylinders.


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[marko1au]

another question ....... is ve vf commodore vacuum pump running stand alone or inline with engine vacuum .............. im using one as stand alone but would like to know if im pushing my luck using it this way

 

                  Mark 

[rexy]

another question ....... is ve vf commodore vacuum pump running stand alone or inline with engine vacuum .............. im using one as stand alone but would like to know if im pushing my luck using it this way

 

                  Mark 

 

 

It needs to be in a closed system to make vacuum or it will run continuously and not make any vacuum.

Do not connect to any other piping.

[UCSLE]

It needs to be in a closed system to make vacuum or it will run continuously and not make any vacuum.

Do not connect to any other piping.

it is a vacuum assist pump and it needs to be connected to engine vacuum by a one way valve

thats what it is made for

 

you can maybe try running two of them pumps , going to try it on one of my cars but still its a weak pump

Edited by UCSLE, 24 September 2023 - 12:13 PM.

[Uncle Chop Chop]

Hella make one:

 

https://www.hella.co...umpumpen-10082/

[rexy]

it is a vacuum assist pump and it needs to be connected to engine vacuum by a one way valve

thats what it is made for

 

you can maybe try running two of them pumps , going to try it on one of my cars but still its a weak pump

 

Are you talking about the UP28 Hella pump as fitted to the VE VVT V6?

 

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This and similar pumps are in every wreckers yard and can be had very cheaply. They are designed to work in a closed system and will pull 20 inches of vacuum with ease. Some come with a useable vacuum control switch like the Volvo one I used in my yellow LJ.

[claysummers]

Might have to fit one of these to my landcruiser. Quoted $800 for a new one 8(


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[UCSLE]

Are you certain it was a closed system in the volvo ?

 

All the cars i have seen the UP28 in its been a assist pump

 

It is not about how much vacuum the pump can pull in total but more the length of time it takes  

 

Hella States it as "Typical for support applications" and also has less than half the service life compared to a UP50

 

You may get away with one if your car has a small booster but the test i did with a LH V8 booster it took longer to reach its vacuum 

 

https://www.hella.co...069076a_AM0.pdf

 

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This picture is how a Holden cruze with a UP28 is , stock from factory 

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[Uncle Chop Chop]

I was looking through a Hella  brochure and stumbled across it. I know nothing else, just thought I'd mention it.

[marko1au]

sorry to ask ............... what hg of vacuum is needed to maintain a lx dual diaphragm booster ................ was thinking 17 - 22 ............ but happy to be corrected ...............