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Thread: DIY swapping altitude compensator for boost compensator Bosch VE

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  1. #1
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    DIY swapping altitude compensator for boost compensator Bosch VE

    All,

    After much deliberation I have decided to upgrade the 1HZ and fit a hair dryer.

    I will do as much of it myself as possible, all of it if only the heavens allow.

    It will be a complete do over-

    • turbo kit
    • exhaust
    • intercooler
    • boost compensator
    • EGT and PSI gauges


    question - has anyone here swapped their altitude compensator for a boost compensator? I spoke with a couple of pump mechanics and they are happy to do it for me (at a premium of course). I would like to purchase the parts and do it myself. I see a very handy sticky from SmithW on this site with detailed photos and descriptions for pump overhaul, which will go a very long way for me.

    the rest is all pretty basic, its just this one bit I need some more info on.

    any help / advice is appreciated.

    thanks again guys!
    Regards,

    Cade.

    2002 100 series Landcruiser
    240,000 Km and counting on B100, 330,000km total on car.
    Naturally aspirated, Walbro Pusher pump just upstream of tank switch valves, Cav filter with reversed fuel flow direction.
    At 160,000 km Rebuilt pump, Reconditioned head and manifolds, glow plugs. Injectors all good after 160,000 km on B100.

  2. #2
    Join Date
    Sep 2005
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    4,130

    Re: DIY swapping altitude compensator for boost compensator Bosch VE

    Isn't an altitude compensator the same thing as a boost compensator?
    They do the same thing. Surely, at most, you may need to adjust the max fuel at full boost.
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  3. #3
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    Sep 2009
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    Brisbane (North Side)
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    Re: DIY swapping altitude compensator for boost compensator Bosch VE

    Quote Originally Posted by Tony From West Oz View Post
    Isn't an altitude compensator the same thing as a boost compensator?
    They do the same thing. Surely, at most, you may need to adjust the max fuel at full boost.
    Hi Tony,

    they operate very similar, but the altitude compensator doesn't have any where near the range of fuel regulation the boost compensator does

    i was very impressed with the ability to make fine adjustment to fuel flow before boost, low boost, on boost and overall flow. My Mazda has one and once I understood how to make the adjustments the adjustability is excellent.

    You can acheive no smoke at all through the entire range and not overfuel or worry about cooking it. My wife drives it 90% of the time so I need it to be smokeless and reliable as she won't be watching temps or boost pressures.
    Regards,

    Cade.

    2002 100 series Landcruiser
    240,000 Km and counting on B100, 330,000km total on car.
    Naturally aspirated, Walbro Pusher pump just upstream of tank switch valves, Cav filter with reversed fuel flow direction.
    At 160,000 km Rebuilt pump, Reconditioned head and manifolds, glow plugs. Injectors all good after 160,000 km on B100.

  4. #4
    Join Date
    Jan 2006
    Location
    In the sunshine state.
    Posts
    857

    Re: DIY swapping altitude compensator for boost compensator Bosch VE

    What boost levels? 1 Hz is not good for high levels keep them low for longevity, Having said that my 1 HDFT is good for 30 PSIm the 1Hz I would conservatively do 7-8 PSI. If you need it I have a HDFTE intercooler, small but useful for nix? I know of another too so two for nil?
    Biodiesel Bandit

    Landcruiser '98 80 series B100.

  5. #5
    Join Date
    Sep 2009
    Location
    Brisbane (North Side)
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    703

    Re: DIY swapping altitude compensator for boost compensator Bosch VE

    Quote Originally Posted by Matt View Post
    What boost levels? 1 Hz is not good for high levels keep them low for longevity, Having said that my 1 HDFT is good for 30 PSIm the 1Hz I would conservatively do 7-8 PSI. If you need it I have a HDFTE intercooler, small but useful for nix? I know of another too so two for nil?
    Hey Matt,

    I would be crazy to say no that offer! thanks heaps. I will PM you.

    I don't want it to break records or anything, just need some extra go up the hills and towing. I think it would make a big difference to driveability around town in traffic too.

    I had in my mind 7 Psi as a minimum and around 10 as a max too. this is based on a few good reads on the net and forums etc.

    I really want to do it all myself, don't want to pay a thief to work on it. I have had a bad run in paying people to work on my fuel pumps over time.

    Still missing some info though (I will probably just have a crack it if don't find the info, it can't be that hard if I take my time and document it as I go along). Would like to know how to change the compensators over and also what a rule of thumb for turning up the fuel is to achieve between 7 and 10 psi before I start doing some runs to fine tune it.

    if there are any experienced turbo installers reading this, I would love to hear from you.
    Regards,

    Cade.

    2002 100 series Landcruiser
    240,000 Km and counting on B100, 330,000km total on car.
    Naturally aspirated, Walbro Pusher pump just upstream of tank switch valves, Cav filter with reversed fuel flow direction.
    At 160,000 km Rebuilt pump, Reconditioned head and manifolds, glow plugs. Injectors all good after 160,000 km on B100.

  6. #6
    Join Date
    Jan 2006
    Location
    In the sunshine state.
    Posts
    857

    Re: DIY swapping altitude compensator for boost compensator Bosch VE

    The biggest issue with the 1Hz turbo is cracked pistons, they are simply not up to much boost, I would make 7 the max personally, there is a risk even there. Definately add an intercooler to lower thermal stress, water injection would not hrt either to lower combustion temps by latent heat of evaporation of H2O. Turbo will hurt a little $ !

    Just about to put a better turbo in my beast, 25psi is quite possible which will liven it up, But it is a factory turbo, known to be good for this.
    Biodiesel Bandit

    Landcruiser '98 80 series B100.

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