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Thread: Silvia - Rotary Pump?

  1. #1
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    Silvia - Rotary Pump?

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Anyone ever fit a rotary pump to a Silvia?

    Sounds like fitting an aftermarket turbo to my diesel landcruiser.

    Actually they have a lot in common, the Silvia and the Standard Landcruiser - basic, solid, easily serviced and functional.

    Shakin Stevens
    Bargara Beach, Qld.

  2. #2
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    Re: Silvia - Rotary Pump?

    Quote Originally Posted by 3C3F2A212C2E3D3D4F0 link=1263180243/0#0 date=1263180243
    Anyone ever fit a rotary pump to a Silvia?

    Sounds like fitting an aftermarket turbo to my diesel landcruiser.

    Actually they have a lot in common, the Silvia and the Standard Landcruiser - basic, solid, easily serviced and functional.

    Shakin Stevens
    Bargara Beach, Qld.
    Hi ss,

    In my opinion a complete waste of time for very little result (if any) in the cup.

    If you want rotary, I reckon buy a machine with one!

  3. #3
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    Re: Silvia - Rotary Pump?

    http://www.youtube.com/watch?v=t0D-qiPxCG4

    its been done to a gaggia "baby" ??

    looks the bomb and user friendly......

  4. #4
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    Re: Silvia - Rotary Pump?

    Wow, Olsmokey, cant believe you had that response waiting up your sleeve!

    I wonder if there is there anything that is Not on youtube?

  5. #5
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    Re: Silvia - Rotary Pump?

    olsmokey is my "rating"?? or something not my name, but thats cool

    the noise in that VID is hard to forget BZZZZZZZZZZZZZZZZ gotta be the OPV valve???

    imagine that at 6am, not sure the coffee would be worth the hearing loss I had a laugh

    there is not any sure cure from upgraditis either IMO

  6. #6
    Mal Dimal's Avatar
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    Re: Silvia - Rotary Pump?

    Personally, I wouldnt bother.... All that added complexity for no identifiable return?

    Not practical from any number of standpoints and as 2mcm says, you wont notice any difference in the cup, where it counts. Of course, yes, you could do it just as a technical exercise but there are much better things you could do with the money and time expended.....

    Mal.

  7. #7
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    Procon on Pump in a Silvia is totally doable. Iíve already done it.

    Quote Originally Posted by Dimal View Post
    Personally, I wouldnt bother.... All that added complexity for no identifiable return?

    Not practical from any number of standpoints and as 2mcm says, you wont notice any difference in the cup, where it counts. Of course, yes, you could do it just as a technical exercise but there are much better things you could do with the money and time expended.....

    Mal.
    In case anyone is still interested (I know that this post is really old), I successfully modified a Silvia, with a GE 1/3 HP motor and Procon rotary vein pump. It took a fair while, but the footprint has not been altered one bit. The machine must run from mains water though, and a PID is not absolutely necessary, but is certainly beneficial.
    I did this over 3 years ago and the machine runs fantastically. It has had every day use, since the mod.

    Iím not really into coffee that much. I did this project as a birthday present for my mother. I havenít given it much thought since, till I was talking to my mother and she asked me for some more photos of her machine, from various stages of the build (I always keep photos of my projects).
    Apparently, she was talking to a coffee shop store owner or manager, while picking up some coffee from a place that also sells high end coffee machines. She mentioned what I built for her, and he couldnít believe it (Iím not sure he even really believed her at this point). She ended up showing him a picture that she had on her phone that displays the machine without the back on it. She said that the look on his face spoke volumes and he is very keen to get some more photos. I had some trouble finding these photos, but I finally found them. I havenít told many people before. Recently however, I spoke to 2 people who who tried to convince me that it was technically impossible (not enough real estate to work with). I had to burst their bubble by 100% confirming that it is not only possible, but has been done. I proved it by organising a cup of coffee be made for them with the Silvia...Pictures too...of course.
    If anyone is interested, I can explain exactly what is required to make one. It is pretty involved, with a couple of things that could easily be overlooked.
    The cost to do this project, was about $250. I got the pump and motor secondhand from the states for $150. The machine already belonged to my mother, which had a burnt out vibe motor at the time. It doesnít have to cost a fortune, but is fairly time consuming. That being said, it would be a whole lot quicker if I was to do it again.

    Cheers...
    Javaphile, inorog and level3ninja like this.

  8. #8
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    By the way, I’m not talking about a machine displayed in the YouTube clip. This is a totally enclosed pump & motor.
    Just in case there is any confusion.
    Javaphile likes this.

  9. #9
    Senior Member Jackster's Avatar
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    Absolutely want to see this build!

    Maybe start a dedicated thread on it. You need a few (10?) Before you can add pics.

    1/3hp is 250w, pretty big motor for under the hood.

  10. #10
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    Wow, thatís amazing! Definitely want to see some pics of it

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    Iím more than happy to show some pics. Probably start a new Thread.

    Quote Originally Posted by Jackster View Post
    Absolutely want to see this build!

    Maybe start a dedicated thread on it. You need a few (10?) Before you can add pics.

    1/3hp is 250w, pretty big motor for under the hood.

    Yeah, I want to add a few pics, but I was having trouble attaching them.
    So, I need to have more posts before I can add pics???

  12. #12
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    I think there should be something like this on the market.
    All the available machines that have a rotary pump, need so much more bench space than a Silvia.
    As soon as I am able to, I will add pics.
    I’m glad to see that people are interested to see this build.
    I was careful not to let my mum see me walk out with her Silvia in one hand and an angle grinder in the other..
    Dimal likes this.

  13. #13
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    Also, Yeah, it is a big motor...heavy too. The machine is so much heavier now.
    I also had to make a new drip tray.
    Once I can add photos, I can explain everything a lot better.
    Don’t worry, it doesn’t look like a hacked up Silvia. It is totally neat and tidy...Inside and out.
    Dimal likes this.

  14. #14
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    Iím still amazed that itíll fit!

    (Also yes, you need a few posts to be able to add pictures)

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    Iím trying to get my post count up, so that i can post some pics.

    Quote Originally Posted by shauno View Post
    Iím still amazed that itíll fit!

    (Also yes, you need a few posts to be able to add pictures)
    GET READY TO BE AMAZED

    ITíS A SUPER TIGHT FIT, BUT I MANAGED.

    Do you know how many posts I need before I can post some pics???
    Iíll show various stages of the build, with pics. I already have a summary ready to go.
    Pity I canít show it yet. As soon as I am able, Itíll be posted for all to check out.

  16. #16
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    Dying to see this build. Well done.

  17. #17
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    RPP - Rotary Pump Pornography! Oh yeah!

  18. #18
    Senior Member Jackster's Avatar
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    You can host the pics on Imgur or similar and link to the pics
    level3ninja likes this.

  19. #19
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    I’ve sent a message to the forum administrator, asking if I can post this build with pics.
    I’ll see what he says.

  20. #20
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    Ha ha...Good call inorog.
    It shouldn’t be long now.

  21. #21
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    Yeah, I would prefer to post them on here, on a dedicated thread.
    I’m hoping 10 posts will allow me to do so. That would mean I only have 1 to go.

  22. #22
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    Thanks BobSac,
    I’m looking forward to showing it to you guys.

  23. #23
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    Iím still trying to work out how to add pics with descriptions properly.
    In the mean time I hope this couple of pics display ok.
    One is the completed Silvia (missing the drip tray cover, to display the custom drip tray that I made).
    The other couple show the complete machine, without the stainless steel rear cover plate.
    I will post a much more detailed, dedicated thread. I havenít got time at the moment.
    Hopefully this will be ok for now.
    bosco, Dimal, saeco_user and 4 others like this.

  24. #24
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    Let me know if you like this build.
    Would you like an in depth description of the build, from start to finish...With pics at various stages of the build?
    I hope that anyone that is wondering if a Silvia with a rotary vane pump is doable, now knows that it certainly is

  25. #25
    Mal Dimal's Avatar
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    Very nice work Sniper...
    Who'd have thought that it was even possible, or even practical.

    Great stuff,
    Mal.

  26. #26
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    Sniper that is fantastic. Now I'm wondering if I could do the same to my Expobar... As I have a motor and pump I pulled from a old 2 group machine. Did you have to do much with the electrical side or simply plug it in?

  27. #27
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    Wow; that's some bloody good work!
    Very tidy work there; especially like the push fit water inlet from the rear;
    Could you have used a 90 elbow on the back ? Might you some wall space

  28. #28
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    Quote Originally Posted by SNIPER762 View Post
    Let me know if you like this build.
    Would you like an in depth description of the build, from start to finish...With pics at various stages of the build?
    I hope that anyone that is wondering if a Silvia with a rotary vane pump is doable, now knows that it certainly is
    Yes Please Sniper!....We luv reno / rework / rebuild / hop up performance mod....story...
    post away pls

  29. #29
    Senior Member Jackster's Avatar
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    There is a heap of thought in this, and plenty of silver solder.
    Nice job!
    Looking forward to the build up details.

    Does look heavy!

  30. #30
    Senior Member artman's Avatar
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    Wow, awesome work!! Nothing like the satisfaction of a great DIY.

    Would love to see more details.

    Cheers

  31. #31
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    I did consider a 90 degree elbow on the back. However, after doing some research on rotary vane pumps in general, it is considered not good practice to have 90 degree bends that close to the pump. It creates too much water turbulence. In some cases, this will cause the pump to have a loud, high pitched sound. It can also make the pump wear out prematurely. The less cavitation or bubbles being introduced into the water, the better.
    So, where possible, I used slow progressive bends.
    When I have time, I’ll explain everything properly (as best as I can)
    Dimal and inorog like this.

  32. #32
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    Hi Hoggy42,
    Thank you very much.
    I’m not familiar with the Expobar, so I couldn’t say.
    As for the electrical side of things....Definitely Not just a plug and play. Also, I had to add a solenoid that would shut off the water during the steaming phase. Otherwise, the boiler would keep filing up with water (being connected to mains water).
    Dimal likes this.

  33. #33
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    Some of the early (Mid 60's) OMRE Quick Mill domestic machines came with a rotary pump. They are even smaller than a Silvia.
    here's a pic of one swiped from the internet
    Attached Images Attached Images
    Dimal and magnafunk like this.

  34. #34
    Super Moderator Javaphile's Avatar
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    To keep this thread on topic the rifle/cartridge posts have been moved to this thread: https://coffeesnobs.com.au/off-topic...cartridge.html


    Java ".460 Weatherby Mk. V" phile
    Dimal likes this.
    Toys! I must have new toys!!!

  35. #35
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    Wow Aaron. That is a small machine. I’d like to see under the hood.



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