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Thread: Tuning Gaggia OPV?

  1. #1
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    Tuning Gaggia OPV?

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi guys,
    Hope this is the right place in this forum to post a question regarding a modification of the OPV of a Gaggia. Sorry if it is not, but please continue to read, maybe you can help me :-)
    I have seen a post on this website some time ago which mentioned that by default, machines may have a factory setting that makes them use >9 bar for espresso brewing and that it is possible to adjust the OPV accordingly. I just bought a Gaggia Baby Nero (live in Europe, not sure if it is sold in Australia already) and already used a Gaggia MDF grinder for a while with my old (cheap) espresso machine. Currently I need to grind espresso beans (fresh ones) at the finest setting (1 or 2) to get a 25sec flow which leads me to the assumption that pressure may be too high. Gaggia mentioned that this models uses a Ulcer Reciprocating piston pump with 18 bar but honestly, that didnt tell me a lot since my technical skills are basically zero!
    Just would like to know if anybody has experience in modifying the OPV in this model and where to find a how-to?
    Thanks guys. Sorry for the long text but after I got the Gaggia machine, I noticed that still have a looong way to go before knowing how to brew a good espresso and I hope this mod will help me with that.

    Cheers,
    Steve
    PS: Already ordered the Marzocco 7g and 14g baskets since I read that they are more suitable than the original Gaggia ones.

  2. #2
    Member
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    Oct 2006
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    Re: Tuning Gaggia OPV?

    Hi Frosty,

    Welcome to CS!

    Have a look at this post, gives a pretty detailed guide to adjusting the OPV.

    http://coffeesnobs.com.au/YaBB.pl?num=1175171794/0

    As noted in this post, most Gaggias seem to run at 11bar ex factory, so it is worth playing around to get circa 9bar.

    Hope this helps.

    Cheers,

    Michael

  3. #3
    Sleep is overrated Thundergod's Avatar
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    Re: Tuning Gaggia OPV?

    I have a MDF and use 3 or 2 for espresso grind.

  4. #4
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    Re: Tuning Gaggia OPV?

    Behmor Brazen - $249 - Free Freight
    Thanks for the quick reply guys.
    I hope to have the chance to adjust the OPV setting over the weekend. I will keep you posted on how it went.
    Cheers and have a great weekend ahead,
    Steve



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