300 Tdi electric vacuum pump retrofit - Page 2





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  1. #21
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    Default Re: 300 Tdi electric vacuum pump retrofit

    has anybody tried an isuzu 4jb1t alternator to work on a 300tdi ?

    those alternator have a built in vacum which connects to the brake booster

  2. #22
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    Default Re: 300 Tdi electric vacuum pump retrofit

    It will be extremely close to the turbo and you will have to plumb oil lines.
    '07 Land Rover Defender 110 TDI 300 Kalahari (Meisiekind˛)
    '84 Land Rover Defender 110 V8 4-speed Hardtop (Meisiekind) Sold after 12 years of fun and hard work.
    The only thing needed for evil to triumph is for a good man to do nothing.

  3. #23
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    Default Re: 300 Tdi electric vacuum pump retrofit

    Quote Originally Posted by antvz View Post
    Reviving my old thread as I begin thinking about how to do my electric vacuum pump mod.

    I've attached an Audi/VW document I found on the internet, explaining a bit of how their system works.

    From this, I think I'm going to do the following:
    - look in scrapyards (or at Goldwagen) for a vacuum pump and pressure sensor
    - get an inline vacuum reservoir somewhere
    - build a circuit to monitor the pressure and toggle the pump as necessary. This should include a warning light/buzzer if the requisite amount of vacuum cannot be maintained
    The pressure switch will control the pump, so I don't think it's necessary for you to toggle it.
    I also don't think it's necessary for a reservoir as the pump will continuously top up the system. You don't need that much vacuum in reserve.

    It will be nice to have a warning, bit remember you don't loose your brakes with loss of vacuum, you just loose a bit of assistance.
    '07 Land Rover Defender 110 TDI 300 Kalahari (Meisiekind˛)
    '84 Land Rover Defender 110 V8 4-speed Hardtop (Meisiekind) Sold after 12 years of fun and hard work.
    The only thing needed for evil to triumph is for a good man to do nothing.

  4. #24
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    Default Re: 300 Tdi electric vacuum pump retrofit

    Quote Originally Posted by jfh View Post
    The pressure switch will control the pump, so I don't think it's necessary for you to toggle it.
    I also don't think it's necessary for a reservoir as the pump will continuously top up the system. You don't need that much vacuum in reserve.

    It will be nice to have a warning, bit remember you don't loose your brakes with loss of vacuum, you just loose a bit of assistance.
    Yes, if you fit a mechanical pressure switch. The Audi system mentioned here uses a closed-loop setup with a pressure sensor which gives an output voltage which is a function of the pressure. The car's ECU then does the controlling.

    The reason I want to use the sensor rather is that I then set the upper and lower limits to ensure enough vacuum and that the system does not run unnecessarily. Same with the reservoir, but your point is very valid, perhaps it will not be necessary at all as there will be enough residual vacuum in the pipes.

    On a car with disc brakes all round such as the Disco, the power assistance makes a big difference. You have to lean on that pedal with everything you have, to stop the car without it. I would especially want another (unenlightened) driver not to get caught out unawares by an electrical failure.



  5. #25
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    Default Re: 300 Tdi electric vacuum pump retrofit

    Quote Originally Posted by AR155 View Post
    It is time for an update.

    Wingate in Johannesburg sells a vacuum pump kit for about R4600.

    I fitted the electric pump in December. The kit has everything you need included, and the pump is tested by Wingate before selling it.

    I added one relay as peace of mind.

    The electric pump is noisy for a few seconds until the desired vacuum is reached.

    The best part is the engine is running A LOT quieter than before.

    Some pics:

    Size wrt A4 page
    Attachment 474619

    Installation notes
    Attachment 474620

    The kit
    Attachment 474621

    Installed
    Attachment 474622


    Happy days!
    Check out this post from a few years ago.

    An all in one solution.
    Note that there is no reservoir and it's controlled by a pressure switch.

    Hope this helps.
    '07 Land Rover Defender 110 TDI 300 Kalahari (Meisiekind˛)
    '84 Land Rover Defender 110 V8 4-speed Hardtop (Meisiekind) Sold after 12 years of fun and hard work.
    The only thing needed for evil to triumph is for a good man to do nothing.

  6. The Following User Says Thank You to jfh For This Useful Post:


  7. #26
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    Default Re: 300 Tdi electric vacuum pump retrofit

    Quote Originally Posted by jfh View Post
    Check out this post from a few years ago.

    An all in one solution.
    Note that there is no reservoir and it's controlled by a pressure switch.

    Hope this helps.
    Ah, thanks jfh. I actually remember that post and made a half-hearted attempt to look for it a few days ago! Appreciate man.



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