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Presenting the Ultimate Oscar Video
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thebaz
Senior Member


Joined: 27 Mar 2006
Posts: 79
Location: Victoria
Expertise: I like coffee

Espresso: NS Oscar LaCimbali Domus
Grinder: Rancilio md50
Posted Sat Jul 6, 2013, 3:44pm
Subject: Re: Presenting the Ultimate Oscar Video
 

Pete, I was also wondering about fitting an OPV into a plumbed machine where the relief from the pressure side is plumbed into the supply side of the pump with an existing pressure of 1.5 bar, would the pressure be raised on the supply side when using a blind filter and the pump is constantly blowing off at 10bar to the supply side?
I am no hydraulic engineer, so would appreciate some expertise so I know I am not going to blow my filters etc apart with 10 bar.
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plindy
Senior Member
plindy
Joined: 27 Nov 2002
Posts: 73
Location: Seattle
Expertise: Just starting

Espresso: NS Oscar
Grinder: SJ Pharos Lido HG-One
Posted Sun Jul 7, 2013, 2:41am
Subject: Re: Presenting the Ultimate Oscar Video
 

route the OPV excess the same as a tanked model , to the pump feed ?

had wondered the same thing , routed mine to the dishwasher breather

got a hard line push in T connecter clamped soft hose from the OPV to a hard line T
been working fine for the last week

WPR 1,5 bar

connection held for 5 min at 3,5 bar at the Water pressure regulator
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thebaz
Senior Member


Joined: 27 Mar 2006
Posts: 79
Location: Victoria
Expertise: I like coffee

Espresso: NS Oscar LaCimbali Domus
Grinder: Rancilio md50
Posted Mon Jul 8, 2013, 2:07am
Subject: Re: Presenting the Ultimate Oscar Video
 

Thanks Pete,
I am thinking the same thing. It would be easier to just let the OPV exhaust to the drip tray or into the sink than to try
and deal with keeping it in the system.
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thebaz
Senior Member


Joined: 27 Mar 2006
Posts: 79
Location: Victoria
Expertise: I like coffee

Espresso: NS Oscar LaCimbali Domus
Grinder: Rancilio md50
Posted Fri Jul 19, 2013, 5:55pm
Subject: Re: Presenting the Ultimate Oscar Video
 

Hi all.
Just thought I would give an update on my Oscar refurb/mod.
The " Ultimate Oscar Video" has been a huge help, and a big thanks to Plindy, Coffeenoobie, and Markarian, for such an informative video.
I did a complete tear-down and descale using a citric acid bath. I fitted the Musica restrictors, 5mm Silicone foam insulation using worm clamps, replaced the Campini with a Sirai pressurestat, anti vacuum valve, replaced all silicone 'o' rings, and faulty retaining valve. I purchased an OPV kit but haven't as yet installed it, and was also contemplating the Aurelia steam valve mod.
The Oscar now performs the best it ever has and there is no urgency to do any other mods as it is so easy to pull a good shot even with the single basket and even the milk steaming is easy now.
A big thanks also to Gianni from Elektro's http://www.elektros.it who has been more than helpful in supplying parts and good advice.
Thanks to CoffeeGeek for being a great resource hub for coffee enthusiasts worldwide.

Baz
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johnny4lsu
Senior Member
johnny4lsu
Joined: 27 May 2011
Posts: 86
Location: The Sticks
Expertise: I live coffee

Grinder: Baratza Encore
Drip: Clever, Chemex, v60, kalita...
Roaster: Huky 500
Posted Sat Aug 3, 2013, 10:22pm
Subject: Re: Presenting the Ultimate Oscar Video
 

FINALLY got around to tearing my Oscar down.

Decided to only do the complete descale and the gigleur flow restrictors.

WOW! What a difference this made. I'm pumped!!

I have the parts for the steam wand mod if anyone is interested in purchasing them from me for cheap.

It's not a mod that i really need. I'm more of a straight espresso guy and when I do make milk drinks I have no problem with the knob.

Thanks for all the help! I used the video and all of your work to do my stuff today. Couldn't be happier!

 
1 Corinthians 10:31 Therefore, whether you eat or drink, or whatever you do, do everything for the glory of God.
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Coffeenoobie
Senior Member
Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,023
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Sat Aug 3, 2013, 11:17pm
Subject: Re: Presenting the Ultimate Oscar Video
 

Great job, what do you like about the change.  I think you should do the steam mod so you can sell it for more later.  The steam mod is awesome.

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

My coffee treasure map...
Click Here (maps.google.com)

Oscar trick out: http://s156.photobucket.com/user/GandBteam/story/14231
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johnny4lsu
Senior Member
johnny4lsu
Joined: 27 May 2011
Posts: 86
Location: The Sticks
Expertise: I live coffee

Grinder: Baratza Encore
Drip: Clever, Chemex, v60, kalita...
Roaster: Huky 500
Posted Sun Aug 4, 2013, 7:56am
Subject: Re: Presenting the Ultimate Oscar Video
 

I may do it next time I tear the machine down.

I certainly think the Descale did a tremendous amount of good. I also love the fact that my water dance is light years easier to read now.

I'd say between the Descale and the flow restrictors, I'm really excited about my machine right now.

I didn't do the vacuum breaker because I didn't realize I needd a locking nut. I don't have an endless supply of parts like plindy. That's an easy fix whenever I get one in.

 
1 Corinthians 10:31 Therefore, whether you eat or drink, or whatever you do, do everything for the glory of God.
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iampivot
Senior Member


Joined: 17 Jul 2013
Posts: 1
Location: Brisbane, QLD, Aus
Expertise: I like coffee

Posted Tue Aug 13, 2013, 4:43am
Subject: Re: Presenting the Ultimate Oscar Video
 

Am wondering if someone would know when NS changed the insulation on their Oscar? Mine has a rockwool style insulation, but I'm not sure if it's actually just insulation changed during servicing or if it's original.

Picture here; Click Here (coffeesnobs.com.au)
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Coffeenoobie
Senior Member
Coffeenoobie
Joined: 11 Dec 2011
Posts: 3,023
Location: PNW
Expertise: I like coffee

Espresso: N S Oscar
Grinder: K30 & Vario W
Posted Tue Aug 13, 2013, 9:22am
Subject: Re: Presenting the Ultimate Oscar Video
 

When we did the upgrades Markarian had ordered new insulation from NS and it looked the same as my old one shown in the photos.  I guess yours is after market. That was less than a year ago.

 
Coffeenoobie

Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.

My coffee treasure map...
Click Here (maps.google.com)

Oscar trick out: http://s156.photobucket.com/user/GandBteam/story/14231
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marosmith
Senior Member
marosmith
Joined: 15 Dec 2013
Posts: 86
Location: Lafayette, Oregon
Expertise: I love coffee

Espresso: NS Oscar, Silvia V2
Grinder: NS MCF, Baratza Encore
Posted Sat Apr 26, 2014, 11:59pm
Subject: Re: Presenting the Ultimate Oscar Video
 

This is a great thread. I just picked up a used Oscar and will be replacing my Silvia with it.

I really like these mods, but I am not very mechanically inclined, so I will need to figure something out. I am very interested in the vaccum breaker as I have my Silvia on a timer, and the steam lever is also very interesting. I use an Aurelia in a coffee shop and love the steam lever!

Thanks you guys for all your hard work on this.
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