46 replies to this topic

[rexy]

Has anyone had experience with using an electric vacuum pump for their brakes?
It's for the HQ. Finally got around to checking how much vacuum it has and the answer is 7 inches at idle and 10 at 2000 rpm. No wonder the brakes are hard work.
Brands? Fitting tips?

[wot179]

How bout an alternator off a diesel with a built in vacume pump?

[Bigfella237]

They need a pressurised engine oil supply and return as well though don't they?

 

At least all the Toyota ones I've seen do.

[rodomo]

Yes, to lubricate and to push the vanes out.

 

Option 2 is a bigger vacuum reservoir.

Edited by rodomo, 20 August 2015 - 12:54 AM.

[gtrboyy]

ve v6 vacuum pump is one to use..works well,compact & fairly quiet compared to comp cans product.

Kinda like idea of using vacuum reservoir as well as back up,not really needed though.

[madtoranajzedded]

http://www.abspowerbrake.com/ehpm.html

Edited by madtoranajzedded, 20 August 2015 - 01:35 AM.

[madtoranajzedded]

http://www.abspowerbrake.com/ehpm.html

Damn tried to do a linky but couldnt do it..

[V-SLR5000-P]

I have a SSBC electric vacuum pump hooked up to an HK booster and it works well. The pump is reasonably compact and is mounted under the car. The noise is probably unacceptable to most, although if your engine is lumpy enough to make no vacuum its not so noticeable once the car is running. Unsuspecting passengers certainly have a WTF moment when the ignition is first switched on!

[dattoman]

Hydraboost it

[hatchssv8]

The VE V6 pump with its mounting bracket mounted to the engine works a treat and there is negligble noise and zero vibration

[mick_in_oz]

I've got a Hella UP28? pump on mine with an adjustable vacume switch to set the amount of vacume that can be pumped, works a treat, wish I had have does this years ago.

 

Mine is mounted on a custom bracket underneath the master cylinder, and using an inline Japanese car style check valve. You can hear it easily when the ignition is switched on but not once the engine is running.

 

I never got the reasoning behind a vac tank if the manifold vacume is very low, I mean why would you want to store lots more of not enough vacume, will just mean the rubbish power assist with work for another application of the brakes, but never be any good.

 

I'll see if I can get a pic soon.

[mick_in_oz]

Pics as mentioned.

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•  DSC01633-1.jpg   148.61K   59 downloads
•  DSC01637-1.jpg   146.45K   52 downloads
•  DSC01636-1.jpg   125.03K   45 downloads

[rexy]

That looks like a fantastic set up Mick.
Thanks everyone, I have much food for thought now.

[76lxhatch]

Hydraboost it

That would be the way, but all these drag racers throw the power steering away!

[rexy]

ve v6 vacuum pump is one to use..works well,compact & fairly quiet compared to comp cans product.
Kinda like idea of using vacuum reservoir as well as back up,not really needed though.

  

The VE V6 pump with its mounting bracket mounted to the engine works a treat and there is negligble noise and zero vibration

Out of interest, what did you use for a vacuum control switch in this install?

[Bigfella237]

Just for interest, I found this picture on the Commodore Forums of a Comp Cams vacuum pump on the left, VE Commodore V6 pump on the right...

 

 Comp Cams Vacuum Pump (left) - VE Commodore V6 Pump (right).jpg   193.21K   29 downloads

 

Anyone happen to have a part number?

 

[ls2lxhatch]

Looks like the pump LS1Hatch posted a link to.

 

ACDelco 20804130

http://www.amazon.co...ric vacuum pump

 

 

Switch and Canister from the Amazon frequently bought together list.

http://www.amazon.co...7HSQKDHY2J27ZZ3

 

http://www.amazon.co...bxgy_263_text_z

Edited by ls2lxhatch, 22 August 2015 - 01:14 AM.

[rexy]

92227002 is the Holden part number. Hold your breath though cause the pricing is $444 trade.
It seems to be likely the same hella pump that Mick has used.

 image.jpg   104.51K   30 downloads
 image.jpg   259.5K   26 downloads

[mick_in_oz]

That's pretty much my pump. The same/similar pump is used on lots of vehicles, there are a few versions of it, one that is rated for less duty as its more an assist pump than a supply all your vacume rated pump.

 

I got mine from summit, and think it was under $200 landed here.

 

The VE pump is the same and I've seen suggestions of getting one from the wreckers for next to nothing.

[gtrboyy]

Yeah wreckers is good bought one off a near new ve  for $80 I think ages ago...cousin flogged it to put on his big block valiant 'cos I haven't even touched gtr in ages.

 

Thought they only need one way check valve?

[mick_in_oz]

The Hella data sheet shows mine used with a vac switch, and a one way valve. It will only manage a bit over 20" vac anyways, but no point in running it 100% of the time and wearing it out.

[rexy]

They have a vacuum sense switch as part of the plastic bung that goes into the booster. I am going to see if this can be made to work as a retrofit.
My Melbourne ring around showed not too many available. Most were asking $100 -110.